The Velocity Ellipsoid of A0 Stars
نویسندگان
چکیده
منابع مشابه
The Tilt of the Halo Velocity Ellipsoid and the Shape of the Milky Way Halo
A sample of ∼1,800 halo subdwarf stars with radial velocities and proper motions is assembled from Bramich et al.’s (2007) light-motion catalog. This is based on the repeated multi-band Sloan Digital Sky Survey photometric measurements in Stripe 82. Our sample of halo subdwarfs is extracted via a reduced proper motion diagram and distances are obtained using photometric parallaxes, thus giving ...
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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...
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The collapse of spherical neutron stars is studied in General Relativity. The initial state is a stable neutron star to which an inward radial kinetic energy has been added through some velocity profile. For two different equations of state and two different shapes of velocity profiles, it is found that neutron stars can collapse to black holes for high enough inward velocities, provided that t...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1958
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/118.2.161