Results 41 to 50 of about 4,354 (212)
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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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
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Heavy metals in intermediate He-rich hot subdwarfs: the chemical composition of HZ 44 and HD 127493 [PDF]
Astronomy & Astrophysics, 2019 Context. Hot subluminous stars can be spectroscopically classified as subdwarf B (sdB) and O (sdO) stars. While the latter are predominantly hydrogen deficient, the former are mostly helium deficient.
M. Dorsch, M. Latour, U. Heber
semanticscholar +1 more source
New observations and asteroseismic analysis of the subdwarf B pulsator PG 1219+534
Open Astronomy, 2018 We present a new asteroseismic modeling of the hot B subdwarf (sdB) pulsator PG 1219+534, based on a 3- month campaign with the Mont4K/Kuiper combination at Mt Bigelow (Arizona) and on updated atmospheric parameters from high S/N low and medium ...
Van Grootel Valérie +5 more
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Hot subdwarfs in resolved binaries [PDF]
Astrophysics and Space Science, 2010 6 pages, 4 figures. Proceedings of The Fourth Meeting on Hot Subdwarf Stars and Related Objects held in China, 20-24 July 2009.
openaire +2 more sources
Metallicity, temperature, and gravity scales of M subdwarfs, [PDF]
Astronomy & Astrophysics, 2019 Aims. The aim of the project is to define metallicity/gravity/temperature scales for different spectral types of metal-poor M dwarfs. Methods. We obtained intermediate-resolution ultraviolet (R ∼ 3300), optical (R ∼ 5400), and near-infrared (R ∼ 3900 ...
N. Lodieu +25 more
semanticscholar +1 more source
Spectroscopic and Photometric Analysis of the HW Vir Star PTF1 J011339.09+225739.1
Open Astronomy, 2018 HW Vir systems are rare eclipsing binary systems including a subdwarf B star (sdB) with a faint companion, mostly M-dwarfs. Up to now, 19 HW Vir systems have been published, three of them with substellar companions. We report the spectroscopic as well as
Wolz Maximilian +9 more
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A search for heavy-metal stars: abundance analyses of hot subdwarfs with Subaru★ [PDF]
Monthly notices of the Royal Astronomical Society, 2019 The discovery of extremely zirconium- and lead-rich surfaces amongst a small subgroup of hot subdwarfs has provoked questions pertaining to chemical peculiarity in hot star atmospheres and about their evolutionary origin. With only three known in 2014,
N. N., C. Jeffery, V. Woolf
semanticscholar +1 more source
HST spectroscopy of chemically peculiar hot subdwarfs: PG 0909+276 and UVO0512–08
Open Astronomy, 2017 High-resolution ultraviolet spectroscopy of two chemically peculiar hot subdwarfs, PG 0909+276 and UVO0512-08, has been obtained using the Hubble Space Telescope.
Wild James, Jeffery Christopher Simon
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The masses of hot subdwarfs [PDF]
Astronomy & Astrophysics, 2009 5 pages, 6 figures, accepted for publication in A&A ...
Zhang, X., Chen, X., Han, Z.
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