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| | [No title] |
 | | ADC Dataset: J/AJ/119/1824 -- CCD photometry of the globular cluster {omega} Centauri. | | | Dataset: J/MNRAS/250/314: CCD photometry of omega Cen (Noble+ 1991) | | | This data set includes 2 table, 0 image/graphic, and 0 text files. |
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http://archive.astro.umd.edu/archive/journals/AJ/119/1824
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| | A tale of two populations |
| | Luigi Bedin (ESO), another member of the team, suggests that the solution might be connected to supernovae: "The scenario we presently favour is one in which the high helium content originates from material ejected during the supernovae explosions of massive stars. | | | The research presented here appeared in the March 10 issue of the Astrophysical Journal, Vol. | | | In this sense, Omega Centauri is a very useful "laboratory" for better understanding the history of star formation. |
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http://www.eurekalert.org/pub_releases/2005-03/eso-at031505.php
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| | [7.18] A Search for Optical Counterparts of Chandra Sources in Omega Centauri using ACS |
| | [7.18] A Search for Optical Counterparts of Chandra Sources in Omega Centauri using ACS | | | Here we report preliminary findings of a search in these data for optical counterparts to more than 100 faint X-ray sources (L | | | The globular cluster Omega Centauri, with its high mass and large, moderate density core, is of interest both for its population of primordial binaries and for the large number of tidal-capture and/or exchange-collision binaries it may harbor. |
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http://www.aas.org/publications/baas/v34n4/aas201/18.htm
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| | NGC 5139 The Omega Centauri Star Cluster |
| | The images were taken using a Takahashi FS-128 refractor, an SBIG ST-8 CCD, and a Homeyer color filter wheel. | | | Omega Centauri contains more variable stars than any other known globular cluster, with the single exception of M3 in Canes Venatici. | | | However, it is so far south, that it is not easy to observe from most locations in the northern hemisphere. |
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http://members.cox.net/sidleach/ngc5139.htm
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| | RedOrbit - Reference Library |
| | The team who carried out this work speculates that this result may indicate that Omega Centauri might be the remnant of a nucleus of a small galaxy which has merged with our Milky Way. | | | Recent evidence indicates that Omega Centauri is by far the most massive of the about 150 known globular clusters in the Milky Way. | | | Halley was the first to document its nonstellar nature, and listed it as "luminous spot or patch in Centaurus" in his historical list of six such objects. |
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http://www.redorbit.com/education/reference_library?article_id=54
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| | Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations |
| | Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link. | | | Energy Citations Database (ECD) Document #5983584 - Eclipsing binary V78 Omega Centauri |
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http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=5983584
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| | [No title] |
| | It is a naked-eye object, looking rather fuzzy, but as bright as a 4th magnitude star. | | | Omega Centauri is not a recent discovery, either. | | | Omega Centauri belongs to the constellation Centaurus, well-known because of Alpha Centauri and one of its companions, Proxima Centauri, the closest star outside of our solar system. |
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http://www.dushkin.com/text-data/weekly/as10-22-01.mhtml
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| | Event Horizon Volume 3 6 The Hunt for Red Omega |
| | For our friends "down-under" will attest, Omega Centauri is normally a bright object of magnitude 3.7, but at only 1.5 degrees above the horizon, it will only shine at 6.3 (assuming the atmosphere is transparent and steady). | | | This month and next are optimal times to see the Great Omega Centauri, probably the finest globular cluster of all. | | | Further arrangements will be made as the dates approach. |
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http://amateurastronomy.org/Events/EH364.html
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| | Find in a Library: [Omega] Centauri : a unique window into astrophysics : proceedings of a conference held at the ... |
| | WorldCat is provided by OCLC Online Computer Library Center, Inc. on behalf of its member libraries. | | | [Omega] Centauri : a unique window into astrophysics : proceedings of a conference held at the Institute of Astronomy, Cambridge University, Cambridge, United Kingdom, 13-16 August 2001 | | | Find in a Library: [Omega] Centauri : a unique window into astrophysics : proceedings of a conference held at the Institute of Astronomy, Cambridge University, Cambridge, United Kingdom, 13-16 August 2001 |
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http://worldcatlibraries.org/wcpa/ow/dc24324b06b173bba19afeb4da09e526.html
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| | [No title] |
| | 343 (1997) Var stars in Omega Cen (RRL&BLHer) Kaluzny et al, ActaA 47 p.249 (1997) Contact binaries and SD stars in 47 Tuc Kaluzny et al, AJ 113 p.2219(1997)CCD phot - faint var stars in M4 field;12 new Kennedy, IrAJ 24 p. | | | 199 (1996) Detached binaries in Omega Centauri Piotto et al. | | | NGC 5139 (Omega Centauri) C1323-472 R.A. 13 23.8, Dec -47 13' ---------------------------------------------------------------------- NOTE: A catalog of the variable stars in Omega Centauri, based on B and V observations made in 1999-2000, has recently been published by J. Kaluzny and collaborators. |
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http://www.astro.utoronto.ca/~cclement/cat/C1323m472
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| | Omega Centauri, NGC 5139 |
| | For details of photographic exposure, search technical table by AAT reference number. | | | Like most galactic globular clusters, the stellar population of Omega Cen identifies it as one of the oldest objects associated with the Milky Way, indeed its age is comparable to that of the Universe itself. | | | One of the richest in the Milky Way, Omega Cen contains several million stars, but unlike its southern rival, 47 Tucanae, it has a relatively open structure. |
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http://www.aao.gov.au/images/captions/aat089.html
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| | Omega Centauri - Click image to close |
| | Processing : Film scanned at 2700 dpi with Nikon CoolScan LS30 scanner, enhanced with Adobe Photoshop 6.0 | | | Situated in the constellation of Centaurus, Omega Centauri is the largest and brightest of all Globular Clusters in our Milky Way. | | | It is a tipical Southern Hemisphere object and if observed through a telescope it shows an spectacular vision. |
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http://www.astro-physics.com/gallery/astroph/mcogo/omegamc.htm
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| | [No title] |
| | Click on File Name to review table fields and notes. | | | BVRI photometry and equatorial positions for stars in the centre of Omega Centauri | | | This is a four colour photometric study of stars in the central part of the globular cluster Omega Centauri. |
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http://archive.astro.umd.edu/archive/journals/A+AS/115/297
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| | [No title] |
| | "The pure non-collisional Blue Straggler population in the giant stellar system omega Centauri" | | | "New Evidence for the Complex Structure of the Red Giant Branch in Omega Centauri" | | | in "Omega Centauri: a Unique Window into Astrophysics", F. van Leeuwen, G. Piotto & J. Hughes eds. |
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http://www.bo.astro.it/~GC/personal/epancino/papers.html
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| | Best of AOP: NGC 5139: Omega Centauri |
| | SBIG ST10XME CCD camera with color filter wheel | | | Interestingly, Omega Cen is one of the few clusters that is currently passing directly through the plane of our galaxy. | | | Would you like to take images like this? |
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http://www.noao.edu/outreach/aop/observers/n5139.html
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| | Omega Centauri (NGC 4139) |
| | Omega Centauri was listed in Ptolemy's catalogue as a star and given a stellar designation by Bayer. | | | The team who carried out this work speculated that this result may indicate that Omega Centauri is the remnant of the nucleus of a small galaxy that merged with our Milky Way. | | | In the Local Group, it is outshone, among others of its type, only by G1 in the Andromeda Galaxy. |
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http://www.daviddarling.info/encyclopedia/O/OmegaCen.html
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| | pr-11-94.html |
| | Omega Centauri, as this object is called, is the brightest of its type in the sky. | | | In fact, because of its great size and mass, Omega Centauri now appears to be an object that is intermediate between the ordinary globular clusters in the Milky Way and the much larger dwarf spheroidal galaxies which move around our galaxy. | | | Despite the faintness of the stars in Omega Centauri, CORAVEL is able to measure their velocities with a typical uncertainty of only 0.7 km/sec. |
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http://www.eso.org/outreach/press-rel/pr-1994/pr-11-94_pf.html
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| | Hubble Omega Centauri Photo |
| | Omega Centauri is so large in our sky that only a small part of it fits within the field of view of the Wide Field and Planetary Camera 2 (WFPC2) on the Hubble Space Telescope. | | | Omega Centauri is the most luminous and massive globular star cluster in the Milky Way. | | | But the cluster is so old that many thousands of collisions have occurred. |
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http://www.spaceimages.com/omegacentauri.html
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| | Cosmic Voyage-The Online Resource for Amateur Astronomers |
| | Omega Centauri, NGC 5139, is simply one of the most stunning objects in the heavens. | | | Omega Centauri appears nearly one full degree in diameter. | | | No matter how many photographs you may have seen, you are not prepared for your first view of this magnificent king of the globular clusters. |
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http://members.aol.com/billferris/n5139.html
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| | The dynamical distance and intrinsic structure of the globular cluster Omega Centauri / Events & Calendar / CITA |
| | Finally, our dynamical models, which are based on an extension of Schwarzschild's orbit superposition method, allow us to investigate the intrinsic dynamical structure of omega Centauri. | | | This shows that omega Centauri is clearly not isotropic and reveals substructure in its distribution function. | | | For the first time, we have constructed anisotropic axisymmetric dynamical models for omega Centauri that simultaneously fit proper motion and line-of-sight velocity observations of its stars. |
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http://www.cita.utoronto.ca/index.php/events_calendar/the_dynamical_distance_and_intrinsic_structure_of_the_globular_cluster_omega_centauri
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| | Catalogue: J/AJ/119/1824/table5 |
| | J/AJ/119/1824 Caby photometry of {Omega} Centauri (Rey+, 2000) ================================================================================ CCD photometry of the globular cluster {omega} Centauri. | | | Objects: -------------------------------------------------------- RA (2000) DE Designation(s) -------------------------------------------------------- 13 26 45.9 -47 28 37 Omega Cen = NGC 5139 = HD 116790 -------------------------------------------------------- File Summary: | | | We covered {omega} Cen in a 3x3 grid and observed one sequence of this grid per each night. |
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http://vizier.u-strasbg.fr/cgi-bin/Cat?J/AJ/119/1824/table5
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| | Omega Centauri |
| | Omega is a ball of over one million stars and it is 13 billions years old, one of the oldest objects in the universe. |
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http://www.astrographics.com/GalleryPrintsIndex/GP3529.html
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| | VLT First Light |
| | When Omega Centauri is observed through a telescope, even a small one, it looks like a huge swarm of numerous stars, bound together by their mutual gravitational attraction. | | | Some of the ESO press releases which demonstrate the working of the VLT UT1 are reprinted here. | | | It is a 10-minute exposure of the center of Omega Centauri and it demonstrates that the telescope is able to track continuously with a very high precision and thus is able to take full advantage of the frequent, very good atmospheric conditions at Paranal. |
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http://ecf.hq.eso.org/instruments/nicmos/sardinia/node5.html
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| | NGC 5139 - Omega Centauri |
| | The team who carried out this work speculates that this result may indicate that Omega Centauri might be the remnant of a nucleus of a dwarf galaxy which has merged with our Milky Way. | | | This was the first time that multiple populations have been reported in a globular cluster. | | | Astronomy Page >> Some Southern Objects >> NGC 5139 – Omega Centauri |
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http://www.peripatus.gen.nz/Astronomy/objNGC5139.html
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| | RSAA - News - Media Releases |
| | Laura Stanford thinks that Omega Centauri may be the pitiful remnant of a once enormous galaxy that has been ripped to pieces by the gravity of our own galaxy, the Milky Way. | | | "For a few years now there have been hints that there was something very strange about Omega Centauri," Ms Stanford said. | | | Her research, in collaboration with ANU colleagues Dr Gary Da Costa and Professor John Norris, and Dr Russell Cannon from the Anglo-Australian Observatory, conclusively shows that some stars in Omega Centauri formed long after others. |
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http://msowww.anu.edu.au/news/media_releases/media_release_030716.php?p=1
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| | Multiwavelength Omega Centauri |
| | In other words, there is no substantial emission from Omega Centauri at these wavelengths, for similar reasons. | | | Omega Centauri, also known as NGC 5139, has a total mass of about five million Suns, or roughly ten times as large as other large globular clusters. | | | Like other globular clusters, the stars are gravitationally bound into a spherical configuration, with the highest density of stars at the center. |
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http://coolcosmos.ipac.caltech.edu/cosmic_classroom/multiwavelength_astronomy/multiwavelength_museum/omegacen.html
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| | DOC NGC 5139 Omega Centauri |
| | At 167 times magnification, individual members could be identified deep into the core of the cluster. | | | He wrote of it as "the noble globular cluster w Centauri, beyond all comparison the richest and largest object of its kind in the heavens. | | | This explanation of an appearance often noticed in the descriptions of such clusters, is corroborated in this instance by the distribution of these appearently larger stars in rings or mesh-like patterns, chiefly about the centre where the stars are most crowded. |
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http://www.saao.ac.za/assa/html/doc_ngc_5139_omega_centauri.html
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| | Open and Globular Clusters |
| | These are each, probably, the best known of its kind. | | | Spectral measurements of selected components of Omega Centauri show a peculiar distribution along the Hertzprung-Russell diagram: hot, blue-white stars seem rather scarce, with a large number of cluster components laying along the yellow-orange-red part of the spectral sequence. | | | M13, on the other side, has been found to have an overall or composite spectrum which is earlier than both 47 Tucanae and Omega Centauri. |
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http://www.armandocaussade.com/astronomy/open_and_globular.html
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| | OmegaCentauri |
| | This object resides within our own galaxy and is rather close at only around 5,000 light years distance. | | | Please note: Omega Centauri rises to a total of less than 9 degrees elevation above the southern horizon where this photo was taken. | | | This resulted in some odd star shapes due to atmospheric refraction. |
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http://www.homestead.com/sky4me/OmegaCentauri.html
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| | Rich Neuschaefer; From Coe, Omega Centauri and Centaurus A |
| | I suggest finding Omega Centauri with 8x42 or 10x50 binoculars. | | | I was using a 27mm Panoptic giving about 40x. | | | Last Saturday (Mar. 1st), at Coe, several of us were up late enough to see Omega Centauri and Centauarus A. I found Omega Centauri with my Orion 15x63 binocular and then found it with my AP 155EDFS. |
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http://observers.org/reports/2003.03.01.21.html
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| | Abundances in Three Heavy-Element Stars in $\omega$ Centauri |
| | We find no significant evidence for enhancements of Mg and K relative to other stars in $\omega$ Cen but do find evidence for enhancements of Al. | | | This result is in agreement with the interpretation of the positions of these three stars in the color-magni tude diagram of $\omega$ Cen made by Lloyd Evans (1983, MNRAS, 204, 975). | | | ROA 3812 and ROA 5293 are classified as S stars while ROA 371 is classified as a barium star. |
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http://www.aas.org/publications/baas/v25n2/aas182/abshtml/S5009.html
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| | Vol. 265 - Omega Centauri, a Unique Window into Astrophysics |
| | For more information about this publication and other ASP Conference Series Proceedings, click here (a new browser window will open). | | | 265 - Omega Centauri, a Unique Window into Astrophysics |
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http://www.astrosociety.org/online-store/scstore/p-CS265.html
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| | What Joanne is doing... |
| | "Omega Centauri: a Unique Window into Astrophysics" (2002), ASP Conf. | | | Hughes, J., and Wallerstein, G. (2000), "Age and Metallicity Effects in Omega Centauri: Stromgren Photometry at the Main Sequence Turn Off," Astronomical Journal, 119, 1225, astro-ph/9912291. | | | Wallerstein, G., and Hughes, J. "Age and Metallicity Effects in Omega Centauri: Stromgren Photometry at the Main Sequence Turn Off," in the Proceedings of the 35th Liège International Astrophysics Colloquium, "The Galactic Halo: From Globular Clusters to Field Stars," Eds. |
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http://www.astro.washington.edu/hughes
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| | Omega Centauri by Jeff Ball |
| | Comments: Well, I only had a brief window to shoot while Omega was above the mountain ridge, so I used CCD. | | | For more info on this object, please see the |
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http://www.astro-photography.com/omega_ccd.htm
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| | Chandra :: Photo Album :: Centaurus A :: See It For Yourself |
| | The distance between Omega Centauri and Epsilon Centauri is the same distance as between Epsilon Centauris and Centaurus A. Or, connect the imaginary line between Omega Centauri and Iota Centauri and aim your telescope at the middle. | | | To star-hop to this object, you can use Omega Centauri as a guide. | | | Through a telescope, this object is quite a sight, and it shares the same area of sky as the famous Omega Centauri globular cluster. |
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http://chandra.harvard.edu/photo/0157/seeit.html
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| | IceInSpace Forums - Omega Centauri test shot |
| | I reckon you are a bit of a whimp, not wanting to stir up this old debate, do it. | | | My opinion : Omega seems to have more depth. |
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http://www.iceinspace.com.au/forum/showthread.php?t=1376
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| | Omega Centauri concept from the Astronomy knowledge base |
| | Omega Centauri concept from the Astronomy knowledge base | | | physical object > natural object > celestial body > collection of stars > star cluster > globular cluster > unclassified globular cluster > Omega Centauri | | | Next unclassified globular cluster: 47 Tucanae Up: unclassified globular cluster |
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http://www.csi.uottawa.ca:4321/astronomy/OmegaCentauri.html
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| | Omega Centauri |
| | Even though the cluster is 17,000 light years distant from the sun, it is easily visible without a telescope as a 4th magnitude "star" in the southern constellation of Centaurus. | | | Just as historians study the past interactions of peoples and nations to arrive at an idea of how modern civilization came to be structured, astronomers can turn a study of star interactions into knowledge of how star clusters came to be shaped the way they are. | | | Patient and careful examination of the elliptical shape at different distances from Omega Centauri's center reveals the history of the way stars within it have gravitationally interacted with one another as they orbited the center of the cluster over billions of years. |
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http://www.strw.leidenuniv.nl/~reijns/local/omegacen.html
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| | Table of contents for August 1994 |
| | This work has also identified a previously unreported chromospherically active star with a very strong level of activity, HD 160934. | | | BVRI photometry is given for stars in the omega Centauri (=NGC 5139, = C1323-472) calibration field for the Wide Field/Planetary Camera of the Hubble Space Telescope. | | | ROA 3812 and ROA 5293 are classified as S stars while ROA 371 is classified as a K5 barium star. |
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http://pasp.phys.uvic.ca/content/contents_94_08.html
(3659 words)
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| | NGC 5139, Omega Cen |
| | Omega Centauri has been listed as a star by Ptolemy around 130 A.D., and consequently named by Bayer around 1600. | | | More on Omega Centauri (NGC 5139) (SEDS Messier Database) | | | Globular Cluster NGC 5139 (Omega Cen), class VIII, in Centaurus |
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http://www.seds.org/~spider/spider/MWGC/n5139.html
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| | Omega Centauri |
| | Levels and curves (final color balance) were adjusted in Photoshop. | | | Comments: Omega Centauri is the crown jewel of the the Texas Star Party and the biggest and brightest globular cluster (as seen from the Earth) at magnitude 3.7 and the size of the full moon. | | | For U.S. observers, this ball of ancient stars is only visible from the most southern states. |
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http://home.comcast.net/~dave.dockery/OmegaCentauri.html
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| | Omega Centauri |
| | My first time seeing this object much less shooting it on film! | | | Omega Centauri (NGC5139; C80) is the best and largest globular cluster. |
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http://home.earthlink.net/~stevelindsey/omegacentauri.htm
(85 words)
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| | May's Star of the Month: Spica |
| | Spica and Omega Centauri are highest around midnight in early May and ten o'clock at the month's end. | | | Unlike another southern treaure, the Southern Cross, Omega Centauri is far more accessible from temperate northern latitudes, if you know when and where to look. | | | Through a telescope, however, it's easy to picture the globular cluster as a dandelion flower gone to seed -- though it's really a sphere-shaped stellar city teeming with more than a million stars. |
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http://www.idialstars.com/spi.htm
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| | NGC 5139, Omega Centauri |
| | It is located about 17,000 light years away from our Sun and at 4th magnitude, is easily visible without a telescope as a "star" in the constellation of Centaurus. | | | At 36 arc minutes, Omega Centauri is larger than the full moon in apparent size. | | | NGC 5129 is the largest and most spectacular globular cluster in the entire night sky, and the largest in our galaxy. |
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http://www.astropix.com/HTML/C_SPRING/OMEGACEN.HTM
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