Results 91 to 100 of about 4,387 (203)
The Formation of Subdwarf A-type Stars [PDF]
Astrophysical Journal, 2019 Subdwarf A-type stars (sdAs) are objects that have hydrogen-rich spectra with surface gravity similar to that of hot subdwarf stars but effective temperature below the zero-age horizontal branch.
Jinlong Yu +8 more
semanticscholar +1 more source
Ages of White Dwarf–Red Subdwarf Systems
The Astrophysical Journal, 2006 .
Monteiro, Hektor +4 more
openaire +2 more sources
Searching for hot subdwarf stars from the LAMOST Spectra. II. Pure spectroscopic identification method for hot subdwarfs [PDF]
Nippon Tenmon Gakkai obun kenkyu hokoku, 2019 Employing a new machine learning method, named hierarchical extreme learning machine (HELM) algorithm, we identified 56 hot subdwarf stars in the first data release (DR1) of the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) survey ...
Z. Lei +4 more
semanticscholar +1 more source
Abundance analysis of a nitrogen-rich extreme-helium hot subdwarf from the SALT survey [PDF]
, 2023 L. J. A. Scott. +4 more
openalex +3 more sources
Astroserver – Research Services in the Stellar Webshop
Open Astronomy, 2017 A quick look at research and development in astronomy shows that we live in exciting times. Exoplanetary systems, supernovae, and merging binary black holes were far out of reach for observers two decades ago and now such phenomena are recorded routinely.
Németh Péter
doaj +1 more source
Discovery of 118 New Ultracool Dwarf Candidates Using Machine-learning Techniques
The Astronomical JournalWe present the discovery of 118 new ultracool dwarf candidates, discovered using a new machine-learning tool, named SMDET , applied to time-series images from the Wide-field Infrared Survey Explorer.
Hunter Brooks +47 more
doaj +1 more source
A subdwarf’s startling stellar wind [PDF]
Monthly Notices of the Royal Astronomical Society, 1987 Observations selectionnees de la sous naine HD 128220B pour illustrer plusieurs proprietes remarquables de son vent ...
openaire +1 more source
Summary of Eighth Meeting on Hot Subdwarfs and Related Objects
Open Astronomy, 2017 Subjects discussed during the Eighth Meeting on Hot Subdwarfs and Related Objects are summarised. In particular, a succinct presentation is given of challenges to stellar evolution arising from recent observations.
Lynas-Gray Anthony Eugene
doaj +1 more source
Spectral analysis of the He-enriched sdO-star HD 127493
Open Astronomy, 2018 The bright sdO star HD127493 is known to be of mixed H/He composition and excellent archival spectra covering both optical and ultraviolet ranges are available.
Dorsch Matti +2 more
doaj +1 more source
Close-In Substellar Companions and the Formation of sdB-Type Close Binary Stars
Acta Polytechnica CTU Proceedings, 2015 The sdB-type close binaries are believed to have experienced a common-envelope phase and may evolve into cataclysmic binaries (CVs). About 10% of all known sdB binaries are eclipsing binaries consisting of very hot subdwarf primaries and low-mass ...
L. Y. Zhu +4 more
doaj +1 more source