THE ANISOTROPIC SPATIAL DISTRIBUTION OF HYPERVELOCITY STARS
نویسندگان
چکیده
منابع مشابه
The Anisotropic Spatial Distribution of Hypervelocity Stars
We study the distribution of angular positions and angular separations of unbound hypervelocity stars (HVSs). HVSs are spatially anisotropic at the 3σ level. The spatial anisotropy is significant in Galactic longitude, not in latitude, and the inclusion of lower velocity, possibly bound HVSs reduces the significance of the anisotropy. We discuss how the observed distribution of HVSs may be link...
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In recent years several hypervelocity stars (HVSs) have been observed in the halo of our Galaxy. Such HVSs have possibly been ejected from the Galactic center and then propagated in the Galactic potential up to their current position. The recent survey for candidate HVSs show an asymmetry in the kinematics of candidate HVSs (position and velocity vectors), where more outgoing stars than ingoing...
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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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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 (3.5σ) excess of B-type stars with large velocities +275 < vrf < 450 km s −1 and distances d > 10 kpc that are most plausibly explained a...
متن کاملHypervelocity Stars and the Galactic Center
In 2005 we reported the discovery of the first HVS: a 3 M⊙ main sequence star traveling with a Galactic rest frame velocity of at least +709 ± 12 km s, more than twice the Milky Way’s escape velocity at the star’s distance of 110 kpc (Brown et al. 2005). This star cannot be explained by normal stellar interactions: the maximum ejection velocity from binary disruption mechanisms (Blaauw 1961; Po...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2008
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/690/1/l69