Results 51 to 60 of about 6,211 (193)
Electromagnetic Characterization of the LISA Verification Binary ZTF J0526+5934
The Astrophysical Journal, 2023 We present an analysis of new and archival data to the 20.506 minute LISA verification binary J052610.42+593445.32 (J0526+5934). Our joint spectroscopic and photometric analysis finds that the binary contains an unseen M _1 = 0.89 ± 0.11 M _⊙ CO-core ...
Alekzander Kosakowski +3 more
doaj +1 more source
Single and Composite Hot Subdwarf Stars in the Light of 2MASS Photometry
, 2003 Utilizing the Two Micron All Sky Survey (2MASS) Second Incremental Data Release Catalog, we have retrieved near-IR magnitudes for several hundred hot subdwarfs (sdO and sdB stars) drawn from the "Catalogue of Spectroscopically Identified Hot Subdwarfs ...
Bixler J. V. +15 more
core +2 more sources
The magnetic fields of hot subdwarf stars [PDF]
, 2012 Detection of magnetic fields has been reported in several sdO and sdB stars. Recent literature has cast doubts on the reliability of most of these detections.
Bagnulo +16 more
core +1 more source
A Series of Subdwarf Atmospheres.
The Astrophysical Journal Supplement Series, 1961 A series of model stellar atmospheres, representing stars of low heavy- element content, is tabulated. Characteristics of the continua of the models, including (U,B,V) colors and bolometric corrections, are discussed and compared with observations. (auth)
Thomas L. Swihart, David Fischel
openaire +1 more source
Asteroseismology of hot B subdwarf stars
EPJ Web of Conferences, 2013 Non-radial pulsations in Extreme Horizontal Branch stars (also known as hot B subdwarfs or sdB stars) offer strong opportunities to study, through asteroseismology, the structure and internal dynamics of stars in this intermediate stage of stellar ...
Fontaine G. +5 more
doaj +1 more source
M Subdwarf Research. III. Spectroscopic Diagnostics for Breaking Parameter Degeneracy
The Astrophysical Journal, 2023 To understand the parameter degeneracy of M subdwarf spectra at low resolution, we assemble a large number of spectral features in the wavelength range 0.6–2.5 μ m with band strength quantified by narrowband indices. Based on the index trends of BT-Settl
Shuo Zhang +7 more
doaj +1 more source
The EC14026 Stars — Pulsating Hot Subdwarfs [PDF]
Symposium - International Astronomical Union, 1998 The Edinburgh-Cape Blue Object Survey (Stobie et al. 1997a) is a southern hemisphere survey to discover hot, blue stellar objects brighter than B=18 at galactic latitudes more than 30° from the galactic plane. The main categories of object detected are hot subdwarfs, white dwarfs, blue horizontal branch stars, apparently normal B stars, cataclysmic ...
C. Koen +3 more
openaire +1 more source
Hot subdwarf formation: Confronting theory with observation
EPJ Web of Conferences, 2013 The formation of hot subdwarf stars is still unclear. Both single-star and binary scenarios have been proposed to explain the properties of these evolved stars situated at the extreme blue end of the horizontal branch. The observational evidence gathered
Geier S.
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
doaj +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 +1 more source