Results 81 to 90 of about 4,387 (203)
The Astrophysical Journal, 1982 The properties and evolutionary status of the hot B and O subdwarfs are reinvestigated using recent homogeneous grids of hot, high-gravity model atmospheres and detailed convective envelope calculations appropriate to the hot subdwarf region of the H-R diagram discussed by Greenstein and Sargent.
F. Wesemael +4 more
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Hot subluminous stars: Highlights from the MUCHFUSS and Kepler missions
EPJ Web of Conferences, 2013 Research into hot subdwarf stars is progressing rapidly. We present recent important discoveries. First we review the knowledge about magnetic fields in hot subdwarfs and highlight the first detection of a highly-magnetic, helium-rich sdO star.
Geier S., Heber U., Gaensicke B.
doaj +1 more source
Multifilter Time-series Observations of Eleven Blue Short-period ATLAS Variable Stars
The Astronomical Journal, 2023 Eleven periodic variable stars were observed photometrically through two to four filters from the set UBVR _C I _C . Phase-folded data for each star cover full cycles of variation.
C. Koen, V. Schaffenroth, A. Kniazev
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The Astrophysical Journal Supplement SeriesWe conducted an analysis of the abundances of He, C, and N in 210 He-rich hot subdwarfs observed within both the Gaia Data Release 3 (DR3) and LAMOST DR7 data sets.
Yangping Luo +3 more
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A FEROS Survey of Hot Subdwarf Stars
Open Astronomy, 2018 We have completed a survey of twenty-two ultraviolet-selected hot subdwarfs using the Fiber-fed Extended Range Optical Spectrograph (FEROS) and the 2.2-m telescope at La Silla. The sample includes apparently single objects as well as hot subdwarfs paired
Vennes Stéphane +2 more
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New Hot Subdwarf Stars Identified in Gaia DR2 with LAMOST DR5 Spectra. II. [PDF]
Astrophysical Journal, 2018 Three hundred and eighty eight hot subdwarf stars have been identified by using the Hertzsprung–Russell (HR) diagram built from the second data release of the Gaia mission.
Z. Lei +3 more
semanticscholar +1 more source
Microscopic diffusion and subdwarfs
, 1999 The recent distance determinations by HIPPARCOS have allowed to locate very precisely a reasonable set of subdwarfs in the HR diagram. A detailed comparison with evolutionary models is now possible and it has been recently claimed that the observed lower part of the main-sequence is cooler than the computed one.
Morel, P., Baglin, A.
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Purple dwarfs: New L subdwarfs from UKIDSS and SDSS
EPJ Web of Conferences, 2013 The first L subdwarf was a discovered only ten years ago. Less than ten L subdwarfs been published in the literature to date. Metal-poor ultracool atmospheres has not been well understood.
Marocco F. +7 more
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Detection of the Ultraviolet Spectrum of the Hot Subdwarf Companion of 60 Cygni (B1 Ve) from a Survey of IUE Spectra of Be Stars [PDF]
, 2017 We used archival International Ultraviolet Explorer (IUE) high-dispersion, short wavelength spectra data to search for evidence of the spectra of hot subdwarf companions of six rapidly rotating Be stars in binary systems. We searched for the signature of
Luqian 璐茜 Wang 王 +2 more
semanticscholar +1 more source
Hot subdwarf B stars with neutron star components [PDF]
Astronomy & Astrophysics, 2018 Context. Subdwarf B stars (sdBs) play a crucial role in stellar evolution, asteroseismology, and far-UV radiation of early-type galaxies, and have been intensively studied with observation and theory.
You Wu +4 more
semanticscholar +1 more source