2MASS J12203654+5009297 , the SIMBAD biblio

2007ApJ...660..311B - Astrophys. J., 660, 311-318 (2007/May-1)

Hypervelocity stars. II. The bound population.

BROWN W.R., GELLER M.J., KENYON S.J., KURTZ M.J. and BROMLEY B.C.

Abstract (from CDS):

Hypervelocity stars (HVSs) are stars ejected completely out of the Milky Way by three-body interactions with the massive black hole in the Galactic center. We describe 643 new spectroscopic observations from our targeted survey for HVSs. We find a significant (3.5 σ) excess of B-type stars with large velocities +275 km/s < vrf< 450 km/s and distances d>10 kpc that are most plausibly explained as a new class of HVSs: stars ejected from the Galactic center on bound orbits. If a Galactic center ejection origin is correct, the distribution of HVSs on the sky should be anisotropic for a survey complete to a fixed limiting apparent magnitude. The unbound HVSs in our survey have a marginally anisotropic distribution on the sky, consistent with the Galactic center ejection picture.

Abstract Copyright:

Journal keyword(s): Galaxy: Center - Galaxy: Halo - Galaxy: Kinematics and Dynamics - Galaxy: Stellar Content - Stars: Early-Type

VizieR on-line data: <Available at CDS (J/ApJ/660/311): table2.dat>

Nomenclature: Table 2: [BGK2006] JHHMMSS.ss+DDMMSS.s N=643.

Simbad objects: 655

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2019.08.24-10:22:58

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