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The masses of hot subdwarfs [PDF]
Astronomy and Astrophysics, 2009 Masses are a fundamental parameter, but they are not well known for most hot subdwarfs. In general, the mass of a hot subdwarf is derived with asteroseismology or dynamical methods, for which it is often difficult to obtain the necessary data from ...
Zhanwen Han
exaly +6 more sources
Hot Subdwarfs in Resolved Binaries [PDF]
Astrophysics and Space Science, 2010 In the last decade or so, there have been numerous searches for hot subdwarfs in close binaries. There has been little to no attention paid to wide binaries however. The advantages of understanding these systems can be many.
A. Ströer +21 more
core +2 more sources
X-ray emission from hot subdwarfs with compact companions
EPJ Web of Conferences, 2013 We review the X-ray observations of hot subdwarf stars. While no X-ray emission has been detected yet from binaries containing B-type subdwarfs, interesting results have been obtained in the case of the two luminous O-type subdwarfs HD 49798 and BD + 37°
Esposito P. +3 more
doaj +2 more sources
X-rays from hot subdwarfs [PDF]
Advances in Space Research, 2016 Review paper to be published in Advances in Space Research (special issue on "X-ray emission from hot stars and their winds")
S Mereghetti, N La Palombara
exaly +4 more sources
Kinematics of nearby Subdwarfs [PDF]
Astrophysics and Space Science, 1999 Latex, 4 pages, 6 figures. To appear in the proceedings of the `Galaxy Evolution' conference held in Meudon, September, 21 - 25 ...
Fuchs, B., Jahreiss, H., Wielen, R.
openaire +2 more sources
Asteroseismic Observations of Hot Subdwarfs
Frontiers in Astronomy and Space Sciences, 2021 There are a number of reasons for studying hot subdwarf pulsation; the most obvious being that these stars remain a poorly understood late-stage of stellar evolution and knowledge of their interior structure, which pulsation studies reveal, constrains ...
A. E. Lynas-Gray +2 more
doaj +1 more source
The subdwarf luminosity function [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 Using data from the Sloan Digital Sky Survey Early Data Release and SuperCOSMOS Sky Survey scans of POSS-I plates we identify a sample of 2600 subdwarfs using reduced proper motion methods and strict selection criteria. This forms one of the largest and most reliable samples of candidate subdwarfs known, and enables us to determine accurate luminosity ...
Digby, Andrew P. +4 more
openaire +2 more sources
COOL SUBDWARF INVESTIGATIONS. III. DYNAMICAL MASSES OF LOW-METALLICITY SUBDWARFS [PDF]
The Astronomical Journal, 2016 ABSTRACT We report dynamical mass measurements for the components of the previously known double-lined spectroscopic subdwarfs G 006-026 B and C using the Fine Guidance Sensors on the Hubble Space Telescope. To build the empirical mass–luminosity relation for low-metallicity subdwarfs, we collect four other subdwarf systems with ...
Wei-Chun 饒惟君 Jao +4 more
openaire +2 more sources
Origin and pulsation of hot subdwarfs [PDF]
Proceedings of the International Astronomical Union, 2013 AbstractWe briefly introduce hot subdwarfs and their evolutionary status before discussing the different types of known pulsators in more detail. Currently, at least six apparently distinct types of variable are known among hot subdwarfs, encompassing p- as well as g-mode pulsators and objects in the Galactic field as well as in globular clusters. Most
Randall, Suzanna K +4 more
openaire +1 more source
Hot Subdwarfs in the Galactic Bulge [PDF]
The Astrophysical Journal, 2005 Recent observations and theories suggest that extreme horizontal branch (EHB) stars and their progeny should be the cause of the UV excess seen in the spectra of many elliptical galaxies. Since the Galactic Bulge is the closest representation of an old, metal-rich spheroid in which we are able to study the EHB scenario in detail, we obtained spectra of
Busso, Giorgia +4 more
openaire +3 more sources