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Sagittarius A* Companion S0-2: A Probe of Very High Mass Star Formation

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/48301

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Title: Sagittarius A* Companion S0-2: A Probe of Very High Mass Star Formation
Creators: Gould, Andrew; Quillen, Alice
Keywords: binaries: general
Galaxy: center
stars: early-type
stars: formation
stars: fundamental parameters
stars: kinematics
Issue Date: 2003-08-01
Publisher: American Astronomical Society
Citation: Andrew Gould and Alice Quillen, "Sagittarius A* Companion S0-2: A Probe of Very High Mass Star Formation," The Astrophysical Journal 592, no. 2 (2003), doi:10.1086/375840
DOI: 10.1086/375840
Abstract: The star S0-2, which is orbiting Sgr A* with a 15 yr period, almost certainly did not form in situ. We propose that it was injected into this close orbit by the tidal disruption of a massive-star binary, whose primary was more massive than S0-2 and at least 60 Msun. From numerical integrations we find that 1%-2% of incoming binaries with closest approach equal to 130 AU leave the secondary in an orbit with eccentricity within 0.01 of that of S0-2. If additional stars are found orbiting Sgr A* with relatively short periods, they could be used to probe the formation of massive stars in the Galactocentric region, even though the massive stars themselves have long since perished.
ISSN: 1538-4357
URI: http://hdl.handle.net/1811/48301
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