Results 11 to 20 of about 6,211 (193)
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
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The masses of hot subdwarfs [PDF]
Astronomy & 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 ...
Alexander +40 more
core +3 more sources
X-rays from Hot Subdwarfs [PDF]
Advances in Space Research, 2015 Thanks to the high sensitivity of the instruments on board the XMM-Newton and Chandra satellites, it has become possible to explore the properties of the X-ray emission from hot subdwarfs.
La Palombara, Nicola, Mereghetti, Sandro
core +6 more sources
The discovery of a T6.5 subdwarf [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 We report the discovery of ULAS J131610.28+075553.0, an sdT6.5 dwarf in the UKIDSS Large Area Survey 2 epoch proper motion catalogue. This object displays significant spectral peculiarity, with the largest yet seen deviations from T6 and T7 templates in ...
A. J. Burgasser +57 more
core +4 more sources
Analysis of F and G subdwarfs. 3 - An abundance analysis of the subdwarf mu Cassiopeia [PDF]
The Astrophysical Journal, 1968 Model atmospheric abundance analysis of subdwarf micron Cassiopeia ...
Cohen, J. G.
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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 ...
B. Fuchs, H. Jahreiß, R. Wielen
openalex +4 more sources
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
The evolution of a hot subdwarf: observations of the pulsating subdwarf B star Feige~48 [PDF]
, 2003 Since pulsating subdwarf B (sdBV or EC14026) stars were first discovered (Kilkenny et al, 1997), observational efforts have tried to realize their potential for constraining the interior physics of extreme horizontal branch (EHB) stars. Difficulties encountered along the way include uncertain mode identifications and a lack of stable pulsation mode ...
M. D. Reed, S. D. Kawaler, teams.
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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
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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