A search for transiting planets around hot subdwarfs [PDF]
Astronomy & Astrophysics, 2021 Context. Hot subdwarfs experienced strong mass loss on the red giant branch (RGB) and are now hot and small He-burning objects. These stars constitute excellent opportunities for addressing the question of the evolution of exoplanetary systems directly ...
V. Van Grootel +81 more
openalex +3 more sources
The Astrophysical JournalWe report the results of a spectroscopic survey of candidate T subdwarfs identified by the Backyard Worlds: Planet 9 program. Near-infrared spectra of 31 sources with red J − W2 colors and large J -band reduced proper motions show varying signatures of ...
Adam J. Burgasser +36 more
doaj +2 more sources
Constraining Roche-Lobe Overflow Models Using the Hot-Subdwarf Wide Binary Population
Open Astronomy, 2017 One of the important issues regarding the final evolution of stars is the impact of binarity. A rich zoo of peculiar, evolved objects are born from the interaction between the loosely bound envelope of a giant, and the gravitational pull of a companion ...
Vos Joris, Vučković Maja
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Subaru and Salt Spectroscopy of Chemically Peculiar Hot Subdwarfs
Open Astronomy, 2017 The majority of hot subdwarfs lie on or close to the helium main-sequence. Many have hydrogen-rich surfaces, but a substantial fraction of the hotter subdwarfs have hydrogen-depleted or hydrogen-deficient surfaces. Amongst the former, three were known to
Jeffery C. Simon +4 more
doaj +2 more sources
He-rich Hot Subdwarf Stars Observed in Gaia DR3 and LAMOST DR7: Carbon and Nitrogen Abundances and Kinematics [PDF]
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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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 ...
Reed, M. D. +2 more
openaire +3 more sources
Hot subdwarfs in close binaries observed from space. II. Analyses of the light variations [PDF]
Astronomy & Astrophysics, 2023 Hot subdwarfs in close binaries with either M dwarf, brown dwarf or white dwarf companions show unique light variations. In hot subdwarf binaries with M dwarf or brown dwarf companions we can observe the so-called reflection effect and in hot subdwarfs ...
V. Schaffenroth +4 more
semanticscholar +1 more source
Hot subdwarfs in close binaries observed from space. I. Orbital, atmospheric, and absolute parameters and the nature of their companions [PDF]
Astronomy & Astrophysics, 2022 About a third of the hot subdwarfs of spectral type B, which are mostly core-helium burning objects on the extreme horizontal branch, are found in close binaries with cool, low-mass stellar, substellar, or white dwarf companions.
V. Schaffenroth +4 more
semanticscholar +1 more source
Chemical Properties of the Local Disk and Halo. II. Abundances of 3745 M Dwarfs and Subdwarfs from Improved Model Fitting of Low-resolution Spectra [PDF]
Astrophysical Journal, 2022 We present a model-fit pipeline to determine the stellar parameters of M-type dwarfs, which is an improvement on our previous work described in Hejazi et al.
N. Hejazi, S. Lépine, T. Nordlander
semanticscholar +1 more source
Discovery of new TESS pulsating hot subdwarfs [PDF]
Astronomy & Astrophysics, 2022 Aims. This work is dedicated to a search for new pulsating hot subdwarfs in TESS photometric data which could have been missed in previous searches. Methods.
J. Krzesinski, L. Balona
semanticscholar +1 more source