RUNAWAY STARS, HYPERVELOCITY STARS, AND RADIAL VELOCITY SURVEYS
نویسندگان
چکیده
منابع مشابه
Runaway Stars, Hypervelocity Stars, and Radial Velocity Surveys
Runaway stars ejected from the Galactic disk populate the halo of the Milky Way. To predict the spatial and kinematic properties of runaways, we inject stars into a Galactic potential, compute their trajectories through the Galaxy, and derive simulated catalogs for comparison with observations. Runaways have a flattened spatial distribution, with higher velocity stars at Galactic latitudes less...
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Introduction: At the center of the Milky Way galaxy lies a black hole with mass ∼ 4× 106 that of the Sun. When a binary star system (two stars gravitationally bound to one another) approaches this massive black hole (MBH), the system can be tidally disrupted. This disruption can lead to the ejection of one star from the Milky Way at velocities of ∼ 1.5 million miles per hour. This is known as a...
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Radial-velocity measurements and sine-curve fits to the orbital radial velocity variations are presented for ten close binary systems: OO Aql, CC Com, V345 Gem, XY Leo, AM Leo, V1010 Oph, V2612 Oph, XX Sex, W UMa, and XY UMa. Most of these binaries have been observed spectroscopically before, but our data are of higher quality and consistency than in the previous studies. While most of the stud...
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1Centre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield AL10 9AB, UK 2Department of Physics and Astronomy, University of Turku, Tuorla Observatory, Vňaisňalňantie 20, FI-21500 Piikkiňo, Finland 3Departamento de Astronomńõa, Universidad de Chile, Camino del Observatorio 1515, Las Condes, Santiago, Chile 4Astronomy Unit, School of Mathematical Sciences, Queen Mary U...
متن کاملOn the origin of high-velocity runaway stars
We explore the hypothesis that some high-velocity runaway stars attain their peculiar velocities in the course of exchange encounters between hard massive binaries and a very massive star (either an ordinary 50 − 100 M⊙ star or a more massive one, formed through runaway mergers of ordinary stars in the core of a young massive star cluster). In this process, one of the binary components becomes ...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2009
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/706/2/925