Results 31 to 40 of about 130 (117)
A Slowly Pulsating Run‐Away B Star at High Galactic Latitude Ejected From a Spiral Arm
Astronomische Nachrichten, Volume 346, Issue 5, June 2025.ABSTRACT We report the discovery of the young B6 V run‐away star LAMOST J083323.18 + 430825.4, 2.5 kpc above the Galactic plane. Its atmospheric parameters and chemical composition are determined from LAMOST spectra, indicating normal composition. Effective temperature (Teff$$ {T}_{\mathrm{eff}} $$ = 14,500$$ \mathrm{14,500} $$ K) and gravity (logg ...
Ulrich Heber +3 more
wiley +1 more source
The Astrophysical Journal Supplement SeriesWe design a convolutional neural network incorporating channel attention and spatial attention mechanisms to predict atmospheric parameters of hot subdwarfs.
Zhenxin Lei +6 more
doaj +1 more source
Rotation in sdB stars as revealed by stellar oscillations
Open Astronomy, 2018 An interesting opportunity offered by the detection of stellar oscillations is the possibility to infer the internal rotation rate of a star through the so-called rotational splittings. Such seismic measurements remained rather scarce for hot B subdwarf (
Charpinet Stephane +5 more
doaj +1 more source
The empirical mass distribution of hot B subdwarfs: Implications for stellar evolution theory
EPJ Web of Conferences, 2013 Subdwarf B (sdB) stars are hot, compact, and evolved objects that form the very hot end of the horizontal branch, the so-called Extreme Horizontal Branch (EHB).
Green E.M. +4 more
doaj +1 more source
Asteroseismic Analysis of Pulsating Subdwarf B Stars [PDF]
International Astronomical Union Colloquium, 2002 AbstractWe briefly present a method to perform detailed asteroseismological analyses of pulsating subdwarf B (sdB) stars (also referred to as the EC14026 stars). We use a forward approach based on the computation of large grids of sdB stellar models (each model being analyzed with a linear nonadiabatic pulsation code) to derive, in an objective way ...
S. Charpinet, G. Fontaine, P. Brassard
openaire +1 more source
The detection of binary companions to subdwarf B stars [PDF]
Monthly Notices of the Royal Astronomical Society, 1998 Intermediate dispersion spectroscopy of a sample of 40 hot subdwarf B stars between 5500 and 9000A has been obtained. The sample includes a large fraction of targets which have been studied photometrically. Seven targets show strong lines arising from the infrared Ca ii triplet, the unequivocal signature of a cool companion.
C. S. Jeffery, D. L. Pollacco
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A search for pulsating blue stars in the vicinity of NGC 6791 using Kepler LC data
EPJ Web of Conferences, 2015 There are 18 known pulsating subdwarf B stars in the field of view of the Kepler spacecraft during phase one. The majority of them were observed in the short cadence mode and have been successfully investigated via asteroseismic methods.
Sowicka Paulina +2 more
doaj +1 more source
Progress in the study of pulsating subdwarf B stars [PDF]
Proceedings of the International Astronomical Union, 2015 AbstractDuring Kepler's main mission, nearly 20 pulsating subdwarf B (sdB: extreme horizontal branch stars) were discovered. Many of these stars were observed for three years, accumulating over 1.5 million observations. Only through these extended observations have we been able to identify pulsation modes, applying constraints for structure models ...
openaire +1 more source
Resolving the pulsations of the subdwarf B star KPD 2109 + 4401 [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 8 pages, 4 figures, 5 tables; Accepted for publication in ...
Zhou, A.-Y. +10 more
openaire +4 more sources
Discovery of the first outbursting hot subdwarf binary: ZTF J0007+4804
Astronomy & AstrophysicsContext. Hot subdwarf binaries with white dwarf companions with orbital periods of less than two hours are progenitor candidates for massive single white dwarfs as well as a variety of thermonuclear explosions. Aims.
Stringer E. +12 more
doaj +1 more source