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| | Binary - Wikipedia, the free encyclopedia |
 | | Binary star, a stellar system consisting of two nearby stars that revolve around a common center of mass. | | | Binary numeral system, a representation for numbers that uses only zeroes and ones as digits. | | | Binary and text files, a computer file that comprises a sequence of encoded numerical values rather than human-readable text |
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http://en.wikipedia.org/wiki/Binary
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| | APOD Index - Stars: Binary Stars |
| | binary star system, each star of the pair follows an elliptical orbital path. | | | In a binary system, the higher mass star will evolve faster and will eventually become a compact object - either a white dwarf star, a neutron star, or black hole. | | | APOD: 1997 February 19 - Mizar Binary Star |
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http://antwrp.gsfc.nasa.gov/apod/binary_stars.html
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| | BINARY |
| | In astronomy, binary is short for binary star, a stellar system consisting of two nearby stars that revolve around a common center of mass. | | | In popular computing, a binary computer file is one that is not human-readable, especially when referring to object code versus source code. | | | In mathematics and computer science, the binary numeral system is a representation for numbers that uses only zeroes and ones as digits. |
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http://www.yotor.org/wiki/en/bi/Binary.htm
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| | Binary Stars |
| | The binary nature of the system is deduced from the periodic doppler shifts of the wavelengths of lines seen in the spectrum, as the stars move through their orbits around the center of mass. | | | A binary star system consists of two stars which orbit around a common point, called the center of mass following Kepler's Laws. | | | The only way that we can determine the masses of stars is to study the orbital motions of binary stars. |
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http://astrosun2.astro.cornell.edu/academics/courses/astro201/binstar.htm
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| | Open Directory - Science: Astronomy: Stars: Binary Stars |
| | Binary Star Simulation - This is a representation of the binary star on a graphical and easy way. | | | The Formation of Binary Stars - Recent observational investigations of the frequency of occurrence of pre-main-sequence binary stars have reinforced earlier suspicions that binary formation is the primary branch of the star-formation process | | | International Astronomical Union - Organization based in Hungary that studies binary stars. |
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http://dmoz.org/Science/Astronomy/Stars/Binary_Stars
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| | Cassiopeia, Vernal Equinox 1995 Issue, |
| | Thus, the powerful techniques of modern binary star analyses permit the distances of star clusters in which they are sometimes found to be determined with precision. | | | If the binary system is detached, with the stellar radii well within Roche lobes, and there is no reason to question the evolution of a component star as if it were a single star, the evolution of both stars is then revealed and the correct isochrone is identified unambiguosly. | | | Both open and globular star clusters have been the objects of recent studies of the relationship between binary stars and the 'blue stragglers' (stars that are too blue for their luminosities, if normal evolution of single stars had produced them). |
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http://www.ras.ucalgary.ca/CASCA/v95/binaries.html
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| | The Journey |
| | In compact binaries, the mass gaining star is a white dwarf, neutron star or black hole, that is generally faint and small relative to the size of the entire binary system. | | | These are binary star systems in which the two stars are so close that each star can influence the evolution of its companion. | | | In this case, the ``slices'' are the emission-line spectra of the binary seen at different positions in the orbit of the binary from one eclipse to the next. |
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http://www.astro.psu.edu/users/mrichards/research/journey.html
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| | 17._Novae.html |
| | There does exist, however, a class of binary stars in which the two components are so close to one another that the evolution of each star is materially affected, in ways we will now explore. | | | I should re-emphasise that binary stars are not made as semi-detached binaries, but if they are not too widely separated to begin with, they can readily evolve to this stage, thanks to the enormous expansion of of a star as it becomes a red giant. | | | In the binary star Algol, for example, we believe that the system started with one blue star of moderately high mass and a second faint red main sequence star, with a potentially long and quiet life ahead of it. |
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http://www.astro.queensu.ca/~hanes/p016/Notes/17._Novae.html
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| | Castor (star) - Wikipedia, the free encyclopedia |
| | Astronomically, Castor was discovered to be a visual binary in 1719, with the magnitude of its components being 2.8 and 2.0. | | | Each of the components of Castor is itself a spectroscopic binary, making Castor a quadruple star system. | | | Castor has a faint companion separated from it by about 72" but having the same parallax and proper motion; this companion is also a spectroscopic binary with a period slightly less than 1 day. |
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http://en.wikipedia.org/wiki/Castor_(star)
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| | Binary star - Wikipedia, the free encyclopedia |
| | Systems in which the individual stars that compose a binary star can be resolved (distinguished) with a powerful enough telescope (including by interferometric methods) are known as visual binaries. | | | Because a majority of stars exist in binary systems, binaries are particularly important to our understanding of the processes by which stars form. | | | Conversely, spectroscopic binary stars move fast in their orbits, and this is because they are close together —usually too close to be detected as visual binaries. |
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http://en.wikipedia.org/wiki/Multiple_star
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| | Binary star - Wikipedia, the free encyclopedia |
| | Binary stars that are simultaneously visual and spectroscopic binaries are rare, and they are a precious source of valuable information when found. | | | Conversely, spectroscopic binary stars move fast in their orbits, and this is because they are close together — usually too close to be detected as visual binaries. | | | Binary stars may be found with any conceivable separation, from pairs orbiting so closely that they are practically in contact with each other, to pairs so distantly separated that their connection is indicated only by their common proper motion through space. |
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http://en.wikipedia.org/wiki/Binary_star
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| | APOD Index - Stars: Binary Stars |
| | binary star system, each star of the pair follows an elliptical orbital path. | | | In a binary system, the higher mass star will evolve faster and will eventually become a compact object - either a white dwarf star, a neutron star, or black hole. | | | able to detect the companion star to Mizar A. This composite image of their observations shows the daily and monthly relative orbital motion in the binary system. |
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http://antwrp.gsfc.nasa.gov/apod/binary_stars.html
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| | SIRIUS - THE DOG STAR - THE LOST AND MISSING STAR |
| | It seems likely that more than two-thirds of the stars in our galaxy are binary or multiple (a system of more than two stars moving around their mutual center of mass), since many stars within 30 light-years of the sun are binary or multiple. | | | The more massive star (A) of a binary is called the primary, and the less massive (B) is called the secondary; e.g., Sirius A and Sirius B are the primary and secondary components of the Sirius system. | | | Although most binary stars have distance between them, the components of W Ursae Majoris binaries are actually in contact with each other, their mutual gravity distorting their shapes into teardrops. |
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http://www.greatdreams.com/dogstar.htm
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| | Eclipsing Binary Stars (Article) |
| | The variations in light intensity from eclipsing binary stars is caused by one star passing in front of the other relative to an observer. | | | The shape of the light curve for an eclipsing binary star system depends mostly on the relative brightness and size of the two stars as well as their orbital inclination as seen from Earth. | | | The x and y positions of the two stars can be used in a computer program to draw the stars on the screen and the z coordinate can be used to determine which star is in front during an eclipse. |
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http://www.physics.sfasu.edu/astro/ebstar/ebstar.html
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| | NWO - Record: fastest flashing star |
| | The researcher registered the fastest ever change in the X-ray emission originating from a binary star. | | | He found that one of the binary stars had a vibrational frequency of 1330 Hz. | | | Astronomer Steve van Straaten studied the time variations in the X-ray emission from various binary stars. |
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http://www.nwo.nl/nwohome.nsf/pages/NWOP_5XZEM5_Eng?Opendocument
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| | binary star |
| | Beta Camelopardalis is a binary star which primary star is 4.0 in magnitude and... | | | binary star or binary system,pair of stars that are held together by their mutual gravitational... | | | two stars, known as a binary star system, whose components may be... |
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http://www.theindustryyellowpages.com/th/binary-star.htm
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| | Project NOVA |
| | One class of multiple star systems, eclipsing binary stars, allows the astronomer to also deduce the diameters of stars. | | | Here is one instance where binary star systems provide critical physical information. | | | Very precise observations of the light curve of an eclipsing binary system can also yield the size of each star and the inclination of the orbit of the binary system. |
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http://www.uncfsu.edu/msec/nova/timmod8q.htm
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| | Introduction |
| | Castor C is the faintest of the three binary systems in the wavelengths of the visible spectrum, and is also the odd one out. | | | The 6 members are divided between 3 binary systems, Castor A, Castor B, and Castor C. Each of these binary systems will be described in turn. | | | Castor is a multiple star system of extraordinary complexity, containing no less that 6 stars, which makes it a rare and fascinating object. |
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http://www.eso.org/outreach/eduoff/edu-prog/catchastar/CAS2002/cas-projects/uk_castor_1/intro.html
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| | O Star Atlas |
| | The visual magnitudes are primarily from the LSC (single stars), the WDS (visual binaries), and the Eighth Catalogue of the Orbital Elements of Spectroscopic Binary Systems (Batten et al. | | | Subsequent perturbations from cluster stars cause a decrease in the semimajor axis of the double binary and an increase in eccentricity. | | | Stars with radial velocity excursions in excess of 35 km/sec are noted as "SB1?" since such large variations are probably related to binary motion. |
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http://ad.usno.navy.mil/wds/dsl/Ostars/ostars.html
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| | Tohline: 2002 NRAC Resource Request |
| | In binaries with unequal components, in general one of the stars will reach contact with its Roche lobe first (the donor) and mass-transfer to its companion star (the accretor) will commence either because the donor star is evolving or because the binary separation is reduced by systemic angular momentum losses. | | | In addition, there is a wide class of binary star systems not presently undergoing mass-transfer for which the astrophysical scenarios that have been proposed to explain their origin or ultimate fate involve dynamical or thermal mass-transfer in a close binary. | | | Binary models using homentropic equations of state are, however, inadequate for examining the stability of mass transfer in main sequence stars without deep convective envelopes (stars with masses greater than but on the order of one solar mass). |
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http://www.phys.lsu.edu/faculty/tohline/NRAC_2002
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| | Nat' Academies Press, High-Energy Astrophysics: American and Soviet Perspectives/Proceedings from the U.S.-U.S.S.R. Workshop on High-Energy Astrophysics (1991) |
| | A small fraction of globular clusters are known to contain neutron star binary systems, evidencing themselves as either the X-ray bursters near the cluster centers, or as millisecond radio pulsars (although note that several of the latter systems are known to have binary periods of months rather than days, and thus store negligible kinetic energy). | | | Close Binary Stars in Globular Clusters BRUCE MAROON University of Washington ABSTRACT Although close binary stars are thought theoretically to play a major role in globular cluster dynamics, virtually no non-degenerate close binaries are known in clusters. | | | On the membership of the RR5 star V65 and the EA binary V78 in Omega Centauri (NGC 5139~. |
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http://www.nap.edu/openbook/0309043344/html/270.html
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| | Gemini, a February Constellation |
| | The primary star is a spectroscopic and occultation binary with a period of 8.17 years. | | | The brighter star is a spectroscopic binary with a 6.13 year period. | | | Both stars are spectroscopic binaries, and small telescopes show a 9th magnitude red dwarf companion, which is itself an eclipsing binary star. |
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http://www.faster.co.nz/~rasnz/Stars/Gemini.htm
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| | AllRefer.com - Castor, in astronomy, Star (Astronomy: Stars) - Encyclopedia |
| | Castor is actually a six-star system, being a visual triple each component of which is a binary star; the three components are an eclipsing binary and a pair of spectroscopic binaries. | | | The two brightest components are white, main-sequence stars of spectral classes A1 and A5. | | | Slightly dimmer than Pollux, with which it forms the Twins, Castor has an apparent magnitude of 1.58, which still makes it one of the 25 brightest stars in the sky. |
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http://reference.allrefer.com/encyclopedia/C/Castor.html
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| | APOD Search Results for "binary" |
| | Sirius was discovered to be a binary star system with a companion star, Sirius B, 10,000 times dimmer than the bright primary, Sirius A. Sirius B was the first white dwarf star discovered, a type of star first understood by Subrahmanyan Chandrasekhar in 1930. | | | The finding suggests that compact binary star systems of 47 Tucanae may be ejected from the cluster before coalescing to form a large black hole at its core. | | | In fact, if large planets form orbiting near the edges of these disks they may be ejected from the binary system. |
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http://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search?binary
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| | Binary clock |
| | The Formation of Binary Stars Recent observational investigations of the frequency of occurrence of pre-main-sequence binary stars have reinforced earlier suspicions that binary formation is the primary branch of the star-formation process | | | The Binary Pulsar: PSR 1913+16 Information on the PSR 1013+16 pulsar, a part of a binary system, the discoverers of which won the Nobel Prize in 1993. | | | Most binary clocks are digital; it can be analog. |
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http://www.serebella.com/encyclopedia/article-Binary_clock.html
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| | Comparison |
| | Castor is a spectroscopic binary system, which means that the second star is not visible and we only know that it is there due to the wobble in the other star. | | | Castor A and B are both shades of blue, within their binary systems, and Castor C has both red dwarfs. | | | In order to understand how unique Castor is, but also in some ways how similar it is to other stars or star systems it must be compared to other stars or star systems. |
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http://www.eso.org/outreach/eduoff/edu-prog/catchastar/CAS2002/cas-projects/uk_castor_1/comp.html
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| | Formation of Binary and Multiple Star Systems |
| | Panel 6: A wide binary system is present with two stars existing in what is called a close binary system and the third star existing alone surrounded by a circumstellar disc. | | | Current estimates claim that over half of the star systems in the Milky Way Galaxy (some estimates even go as high as ninety percent) are actually binary or multiple star systems. | | | The former leads to a single star system, and the latter leads to binary and multiple star systems. |
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http://alumni.imsa.edu/~anneka/binaries/formation.html
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| | binary star - Columbia Encyclopedia article about binary star |
| | There are binary systems in which one member is a pulsar pulsar, in astronomy, a neutron star that emits brief, sharp pulses of energy instead of the steady radiation associated with other natural sources. | | | Although most binary stars have distance between them, the components of W Ursae Majoris binaries are actually in contact with each other, their mutual gravity distorting their shapes into teardrops. | | | binary star or binary system, pair of stars that are held together by their mutual gravitational attraction and revolve about their common center of mass. |
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http://columbia.thefreedictionary.com/binary+star
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| | The First Binary Star |
| | Castor was the first true physical binary to be recognized, and the first object beyond our own Solar System in which the force of gravitation was shown to be operating, as it does in the planetary system." | | | So Castor may be considered the first binary star due to it's historical significance, it's pleasing visual appearance in small telescopes, and it's unusual Bayer's designation. | | | Castor, also known as Alpha Geminorum, may be considered it's first star since alpha is the first letter of the greek alphabet. |
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http://ephemeris.sjaa.net/0205/e.html
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