|
| |
| | Near-Infrared Galaxy Morphology Atlas |
 | | The Hubble sequence, at first glance, appears to be simply a qualitative "roadmap" giving convenient names to the wide variety of galaxies observed in the Universe. | | | Hubble and Humason (1931) understood that the morphological sequence was correlated to the galaxy density environment: galaxy clusters contain more lenticular and elliptical galaxies than the typical field density. | | | Plate 0.--The 2MASS near-infrared galaxy morphology sequence "trident," analogous to the Hubble sequence "tuning fork." The images were created by combining the J, H and K |
|
http://spider.ipac.caltech.edu/staff/jarrett/papers/morph/nir_morph.htm
(7144 words)
|
|
| |
| | EDWIN HUBBLE 1889-1953 By Allan Sandage (1989, JRASC Vol. 83, No.6) |
| | There is Hubble's zone of avoidance, the Hubble galaxy type, the Hubble sequence, the Hubble luminosity law for reflection nebulae, the Hubble luminosity profile for E galaxies, the Hubble constant, the Hubble time, the Hubble diagram, the Hubble redshift-distance relation, the Hubble radius for the universe, and now the Hubble Space Telescope. | | | As with Hubble's Cepheid paper 5 years before, and his space distribution paper to come 5 years in the future, Hubble's (1929b) discovery paper of the expansion was written so convincingly that it was believed almost immediately. | | | In perhaps the most important paper on the series, Hubble and Humason (1931) showed beyond doubt (a) the existence of the effect, (b) that it was linear with distance, and (c) that the brightest members of clusters are predominantly E galaxies (a major discovery related to galaxy and cluster formation). |
|
http://antwrp.gsfc.nasa.gov/diamond_jubilee/1996/sandage_hubble.html
(4767 words)
|
|
| |
| | EDWIN HUBBLE 1889-1953 By Allan Sandage (1989, JRASC Vol. 83, No.6) |
| | There is Hubble's zone of avoidance, the Hubble galaxy type, the Hubble sequence, the Hubble luminosity law for reflection nebulae, the Hubble luminosity profile for E galaxies, the Hubble constant, the Hubble time, the Hubble diagram, the Hubble redshift-distance relation, the Hubble radius for the universe, and now the Hubble Space Telescope. | | | As with Hubble's Cepheid paper 5 years before, and his space distribution paper to come 5 years in the future, Hubble's (1929b) discovery paper of the expansion was written so convincingly that it was believed almost immediately. | | | In perhaps the most important paper on the series, Hubble and Humason (1931) showed beyond doubt (a) the existence of the effect, (b) that it was linear with distance, and (c) that the brightest members of clusters are predominantly E galaxies (a major discovery related to galaxy and cluster formation). |
|
http://antwrp.gsfc.nasa.gov/diamond_jubilee/1996/sandage_hubble.html
(4767 words)
|
|
| |
| | EDWIN HUBBLE 1889-1953 By Allan Sandage (1989, JRASC Vol. 83, No.6) |
| | There is Hubble's zone of avoidance, the Hubble galaxy type, the Hubble sequence, the Hubble luminosity law for reflection nebulae, the Hubble luminosity profile for E galaxies, the Hubble constant, the Hubble time, the Hubble diagram, the Hubble redshift-distance relation, the Hubble radius for the universe, and now the Hubble Space Telescope. | | | Hubble concluded that his observed log N(m) distribution showed a large departure from Euclidean geometry, provided that the effect of redshifts on the apparent magnitudes was calculated as if the redshifts were due to a real expansion. | | | As with Hubble's Cepheid paper 5 years before, and his space distribution paper to come 5 years in the future, Hubble's (1929b) discovery paper of the expansion was written so convincingly that it was believed almost immediately. |
|
http://antwrp.gsfc.nasa.gov/diamond_jubilee/1996/sandage_hubble.html
(4767 words)
|
|
| |
| | EDWIN HUBBLE 1889-1953 By Allan Sandage (1989, JRASC Vol. 83, No.6) |
| | There is Hubble's zone of avoidance, the Hubble galaxy type, the Hubble sequence, the Hubble luminosity law for reflection nebulae, the Hubble luminosity profile for E galaxies, the Hubble constant, the Hubble time, the Hubble diagram, the Hubble redshift-distance relation, the Hubble radius for the universe, and now the Hubble Space Telescope. | | | As with Hubble's Cepheid paper 5 years before, and his space distribution paper to come 5 years in the future, Hubble's (1929b) discovery paper of the expansion was written so convincingly that it was believed almost immediately. | | | In perhaps the most important paper on the series, Hubble and Humason (1931) showed beyond doubt (a) the existence of the effect, (b) that it was linear with distance, and (c) that the brightest members of clusters are predominantly E galaxies (a major discovery related to galaxy and cluster formation). |
|
http://antwrp.gsfc.nasa.gov/diamond_jubilee/1996/sandage_hubble.html
(4767 words)
|
|
| |
| | Near-Infrared Galaxy Morphology Atlas |
| | Hubble and Humason (1931) understood that the morphological sequence was correlated to the galaxy density environment: galaxy clusters contain more lenticular and elliptical galaxies than the typical field density. | | | The Hubble sequence, at first glance, appears to be simply a qualitative "roadmap" giving convenient names to the wide variety of galaxies observed in the Universe. | | | There is evidence that widely separated morphological types (in the Hubble Sequence) have systematically different mean colors (e.g., B-V), presumably from different populations of stars, both old and newly formed, that dominate the light (e.g., Holmberg 1958; de Vaucouleurs 1977; Giovanelli and Haynes 1983; see the review by Roberts and Haynes 1994; Buta et al. |
|
http://www.ipac.caltech.edu/2mass/gallery/galmorph/nir_morph.htm
(7156 words)
|
|
| |
| | Hubble sequence |
| | The Hubble sequence divides spirals into two classes, normal and barred spirals depending on the prescence of a bar shaped bulge in the galaxy's center. | | | The Hubble sequence classifies spirals on the amount of winding in their spiral arms, tightly wound spirals are type Sa, more open spirals are classed Sc. | | | The Hubble sequence classifies ellipticals based on their shape as defined by the ratio of their semi-minor axis to their semi-major axis. |
|
http://zebu.uoregon.edu/~js/ast123/lectures/lec11.html
(1332 words)
|
|
| |
| | 4616.html |
| | We seek to establish that the Hubble sequence for the classification of galaxies, when viewed in the reverse direction, is essentially a temporal evolution sequence (Zhang 1992). | | | This thesis provides a framework for understanding the results of Hubble Space Telescope Deep Field and Medium Deep Survey, which showed that there is significant evolution in the number statistics of the Hubble types of galaxies with redshifts, consistent with an evolution along the Hubble sequence from late to early. | | | Therefore, the entire Hubble sequence can be generated through a single coherent physical process. |
|
http://cfa-www.harvard.edu/ep/preprint/sepoct97/4616.html
(184 words)
|
|
| |
| | Hubble - TheBestLinks.com - Edwin Hubble, Hubble Space Telescope, Hubble's law, Hubble sequence, ... |
| | Hubble, Edwin Hubble, Hubble Space Telescope, Hubble's law, Hubble sequence... | | | Hubble - TheBestLinks.com - Edwin Hubble, Hubble Space Telescope, Hubble's law, Hubble sequence,... | | | This is a disambiguation page, i.e., a navigational aid which lists other pages that might otherwise share the same title. |
|
http://www.thebestlinks.com/Hubble.html
(112 words)
|
|
| |
| | Sequence |
| | Hubble sequence The Hubble sequence is a classification of 1936. | | | Sequence motif A sequence motif is a biological significance. | | | Cotolerant sequence In mathematical logic, a cotolerant sequence is a sequence of cointerpretable in. |
|
http://www.brainyencyclopedia.com/topics/sequence.html
(112 words)
|
|
| |
| | Citebase - Hubble Space Telescope observations of globular cluster systems along the Hubble sequence of spiral galaxies |
| | Hubble Space Telescope observations of globular cluster systems along the Hubble sequence of spiral galaxies | | | We have studied the globular cluster (GC) systems of 7 giant, edge-on spiral galaxies using Hubble Space Telescope imaging in V and I. The galaxy sample covers the Hubble types Sa to Sc, allowing us to study the variation of the properties of GC systems along the Hubble sequence. | | | Citebase - Hubble Space Telescope observations of globular cluster systems along the Hubble sequence of spiral galaxies |
|
http://www.citebase.org/cgi-bin/citations?id=oai:arXiv.org:astro-ph/0304195
(1979 words)
|
|
| |
| | spiral galaxy - encyclopedia article about spiral galaxy. |
| | in the Hubble sequence The Hubble sequence is a classification of galaxy types developed by Edwin Hubble in 1936. | | | , is a spiral, with a Hubble sequence classification of Sbc (possibly SBb). | | | A lenticular galaxy is a type of galaxy which is an intermediate between an elliptical galaxy and a spiral galaxy in the Hubble sequence classification scheme. |
|
http://encyclopedia.thefreedictionary.com/spiral%20galaxy
(1979 words)
|
|
| |
| | EDWIN HUBBLE 1889-1953 By Allan Sandage (1989, JRASC Vol. 83, No.6) |
| | There is Hubble's zone of avoidance, the Hubble galaxy type, the Hubble sequence, the Hubble luminosity law for reflection nebulae, the Hubble luminosity profile for E galaxies, the Hubble constant, the Hubble time, the Hubble diagram, the Hubble redshift-distance relation, the Hubble radius for the universe, and now the Hubble Space Telescope. | | | He solved the problem of the source of radiation and the nature of the spectra of diffuse nebulae, recognizing the difference between emission and reflection nebulae (Hubble 1922a, b), and proving that the source of radiation of reflection nebulae is an associated star. | | | The previous subsections have outlined the four major subjects in which Hubble's results were dominant in the 1930s. |
|
http://antwrp.gsfc.nasa.gov/diamond_jubilee/1996/sandage_hubble.html
(1979 words)
|
|
| |
| | Ast 110: Study Guide |
| | spiral galaxy, elliptical galaxy, irregular galaxy, Hubble sequence, galaxy merger | | | Sequences in the HR Diagram [10.8] (class 20): supergiant, giant, main sequence and white dwarf stars and their location on the HR Diagram | | | The Hubble Law [15.5] (class 33): galaxy redshifts and the redshift-distance relation, the Hubble constant, expansion of the Universe, the Big Bang as cosmic origin |
|
http://www.ifa.hawaii.edu/faculty/acowie/class99/study_guide_final.html
(1168 words)
|
|
| |
| | A History of Mergers |
| | Hubble is perhaps better known for his observations which demonstrated that the Universe is expanding (borne out in the by now infamous Hubble Law), but he was also responsible for another important development of extragalactic astronomy - the Hubble Sequence. | | | It should not be surprising that Hubble spent many years surveying thousands of galaxies, and during the course of his work, he noticed a trend - galaxies could be ordered into a sequence based on their morphology, the so called Hubble Sequence, an illustration of which is shown below. | | | Recent observations of the Hubble Deep Field [1] have shown that the fraction of interacting and merging objects seen is significantly higher than it is among nearby galaxies. |
|
http://www.cv.nrao.edu/~jhibbard/students/CPower/history.html
(1636 words)
|
|
| |
| | Galaxies |
| | Originally Astronomers thought that the Hubble sequence might be an evolutionary sequence with galaxies evolving from right-to-left (or vice versa) along the tuning fork. | | | It is clear, however that the Hubble sequence is a sequence in evolutionary state, however. | | | Hubble detected Cepheid variables in Messier 31 - the Andromeda Galaxy- and other Local Group galaxies, establishing distances of hundreds of thousands to millions of light years. |
|
http://cassfos02.ucsd.edu/public/tutorial/Galaxies.html
(1087 words)
|
|
| |
| | Observable physical properties of galaxies |
| | 2) Hubble sequence represents efficiency of star formation at early times (related to angular momentum??), 3) Hubble sequence is evolutionary | | | This can be extended to spectra features as well; the Hubble sequence is well-correlated with integrated spectral ``types''. | | | Possible alternative is that the Hubble sequence represents different ratio of current star formation to previous star formation, i.e., not depending on absolute value of current SFR. |
|
http://astronomy.nmsu.edu/holtz/a616/ay616/node3.html
(1054 words)
|
|
| |
| | Galaxies |
| | The Hubble Law is also used to determine the overall geometry of the universe (how the gravity of the universe as a whole has warped it). | | | The Hubble Law is calibrated using rung 4 methods for nearby galaxy distances and rung 5 methods for larger galaxy distances. | | | With the Hubble Space Telescope, astronomers were able to use the Cepheid period-luminosity relation out to distances ten times further than what could be done on the ground. |
|
http://www.astronomynotes.com/galaxy/s16.htm
(1776 words)
|
|
| |
| | Encyclopedia: Galaxy |
| | In 1936, Hubble produced a classification system for galaxies that is used to this day, the Hubble sequence. | | | The Hubble sequence is a classification of galaxy types developed by Edwin Hubble in 1936. | | | An elliptical galaxy is a type of galaxy in the Hubble sequence characterized by the following physical properties: The giant elliptical galaxy NGC 4881 (the spherical glow at upper left) lies at the edge of the Coma Cluster of Galaxies. |
|
http://www.nationmaster.com/encyclopedia/Galaxy
(3506 words)
|
|
| |
| | The Bruce Medalists: Edwin Hubble |
| | Hubble sequence of galaxy types [Hubble’s original paper] | | | (He had earlier classified galactic nebulae.) Hubble measured distances to galaxies and with Milton L. Humason extended Vesto M. Slipher’s measurements of their redshifts, and in 1929 Hubble published the velocity-distance relation which, taken as evidence of an expanding Universe, is the basis of modern cosmology. | | | Hubble Law, Hubble Constant, Hubble Time, Hubble Flow, etc. |
|
http://www.phys-astro.sonoma.edu/BruceMedalists/Hubble/index.html
(410 words)
|
|
| |
| | The Bruce Medalists: Edwin Hubble |
| | Hubble sequence of galaxy types [Hubble’s original paper] | | | (He had earlier classified galactic nebulae.) Hubble measured distances to galaxies and with Milton L. Humason extended Vesto M. Slipher’s measurements of their redshifts, and in 1929 Hubble published the velocity-distance relation which, taken as evidence of an expanding Universe, is the basis of modern cosmology. | | | Hubble Law, Hubble Constant, Hubble Time, Hubble Flow, etc. |
|
http://phys-astro.sonoma.edu/BruceMedalists/Hubble/Hubble.html
(410 words)
|
|
| |
| | Encyclopedia: Galaxy |
| | In 1936, Hubble produced a classification system for galaxies that is used to this day, the Hubble sequence. | | | An elliptical galaxy is a type of galaxy in the Hubble sequence characterized by the following physical properties: The giant elliptical galaxy NGC 4881 (the spherical glow at upper left) lies at the edge of the Coma Cluster of Galaxies. | | | The Hubble Deep Field The Hubble Deep Field (HDF) is the result of a series of observations by the Hubble Space Telescope of a small region of the northern celestial hemisphere. |
|
http://www.nationmaster.com/encyclopedia/Galaxy
(3697 words)
|
|
| |
| | The Bruce Medalists: Edwin Hubble |
| | Hubble sequence of galaxy types [ Hubble’s original paper ] | | | Hubble Law, Hubble Constant, Hubble Time, Hubble Flow, etc. | | | Upon graduation from the University of Chicago, Edwin Hubble won a Rhodes scholarship and earned a law degree at Oxford University. |
|
http://www.phys-astro.sonoma.edu/brucemedalists/hubble
(3697 words)
|
|
| |
| | Gerard de Vaucouleurs - encyclopedia article about Gerard de Vaucouleurs. |
| | The de Vaucouleurs modified Hubble sequence is a widely used variant of the standard Hubble sequence The Hubble sequence is a classification of galaxy types developed by Edwin Hubble in 1936. | | | Gérard Henri de Vaucouleurs ( April 25 April 25 is the 115th day of the year in the Gregorian Calendar (116th in leap years). | | | After military service in World War II World War II or the Second World War was a global conflict that began on 7 July 1937, in Asia and 1 September 1939, in Europe and lasted until 1945, involving the majority of the world's countries and every inhabited continent. |
|
http://encyclopedia.thefreedictionary.com/Gerard%20de%20Vaucouleurs
(3697 words)
|
|
| |
| | Hubble Heritage |
| | A dissolve sequence of six images taken by Hubble's Advanced Camera for Surveys shows a CAT-scan-like probe of the three-dimensional structure of the shells of dust surrounding the aging star V838 Monocerotis. | | | This image shows a time sequence of Hubble Space Telescope images of the light echo around V838 Mon, taken between May 2002 and October 2004. | | | The sequence reveals dramatic changes in the way a brilliant flash of light from the star is reflecting off surrounding dusty cloud structures. |
|
http://heritage.stsci.edu/2005/02/supplemental.html
(1073 words)
|
|
| |
| | Extragalactic Astrophysics |
| | We have also seen that the Hubble sequence can be viewed as a sequence in which the importance of the central bulge constantly decreases while the importance of the disk increases. | | | We have seen that the Hubble sequence is based solely on appearance. | | | What are the physical variables which correlate with the Hubble sequence? |
|
http://www.physics.nmt.edu/~dwestpfa/courses/extrag5.html
(275 words)
|
|
| |
| | The Origin of the Hubble Sequence |
| | This conference aims to address some questions of the origin of the Hubble sequence, focusing on the physical processes and observational data that are relevant in this field. | | | Is the Hubble sequence a proper classification scheme for galaxies, reflecting their morphological evolution? | | | Still many open questions remain which stimulate the debate about the answer to a very fundamental question: What is the driving process for the Hubble sequence? |
|
http://www.usm.uni-muenchen.de/CAST/conferences/Vulcano/index.php?sec=2
(313 words)
|
|
| |
| | edwin_hubble |
| | A few are: Hubble's zone of avoidance, the Hubble galaxy type, the Hubble sequence, the Hubble time, the Hubble constant, the Hubble luminosity law for reflection nebulae, the Hubble diagram, and the Hubble Space Telescope. |
|
http://www.tfsd.k12.id.us/rs/astro/edwin_hubble.htm
(225 words)
|
|
| |
| | The Bruce Medalists: Edwin Hubble |
| | Hubble sequence of galaxy types [Hubble’s original paper] | | | (He had earlier classified galactic nebulae.) Hubble measured distances to galaxies and with Milton L. Humason extended Vesto M. Slipher& measurements of their redshifts, and in 1929 Hubble published the velocity-distance relation which, taken as evidence of an expanding Universe, is the basis of modern cosmology. | | | Christianson, Gale E., Edwin Hubble: Mariner of the Nebulae (Farrar, Straus & Giroux, 1995, Univ. of Chicago Press, 1996). |
|
http://phys-astro.sonoma.edu/BruceMedalists/Hubble/Hubble.html
(424 words)
|
|
| |
| | The Bruce Medalists: Edwin Hubble |
| | Hubble sequence of galaxy types [Hubble’s original paper] | | | (He had earlier classified galactic nebulae.) Hubble measured distances to galaxies and with Milton L. Humason extended Vesto M. Slipher’s measurements of their redshifts, and in 1929 Hubble published the velocity-distance relation which, taken as evidence of an expanding Universe, is the basis of modern cosmology. | | | Christianson, Gale E., Edwin Hubble: Mariner of the Nebulae (Farrar, Straus & Giroux, 1995, Univ. of Chicago Press, 1996). |
|
http://phys-astro.sonoma.edu/BruceMedalists/Hubble/Hubble.html
(410 words)
|
|
|
