Results 71 to 80 of about 4,354 (212)
Odessa Astronomical Publications, 2011 The data about occurrence frequency of substars and white dwarfs among close stars are analyzed. The estimation of partial content of subdwarfs and stellar remains among populations II and III as function of power of initial mass function have been made.
В. А. Захожай +2 more
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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
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The discovery of a T6.5 subdwarf [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 We report the discovery of ULAS J131610.28+075553.0, a sdT6.5 dwarf in the UKIDSS Large Area Survey 2 epoch proper motion catalogue. This object displays significant spectral peculiarity, with the largest yet seen deviations from T6 and T7 templates in the Y and K bands for this subtype.
B. Burningham +6 more
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Meet the family − the catalog of known hot subdwarf stars
Open Astronomy, 2017 In preparation for the upcoming all-sky data releases of the Gaia mission, we compiled a catalog of known hot subdwarf stars and candidates drawn from the literature and yet unpublished databases.
Geier Stephan +8 more
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New Pulse Timing Measurements of the sdBV Star CS 1246
Open Astronomy, 2017 CS 1246 is a hot subdwarf B star discovered in 2009 to exhibit a single, large-amplitude radial pulsation. An O-C diagram constructed from this mode revealed reflex motion due to the presence of a low-mass M dwarf, as well as a long-term trend consistent
Hutchens Zackary L. +7 more
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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
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New ultracool subdwarfs identified in large-scale surveys using Virtual Observatory tools - II. SDSS DR7 vs. UKIDSS LAS DR6, SDSS DR7 vs. UKIDSS LAS DR8, SDSS DR9 vs. UKIDSS LAS DR10, and SDSS DR7 vs. 2MASS [PDF]
, 2016 Aims. We aim to develop an efficient method to search for late-type subdwarfs (metal-depleted dwarfs with spectral types ≥M5) to improve the current statistics.
N. Lodieu +13 more
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Investigation of the Nature of the B[e] Star CI Cam in the Optical Range
GalaxiesThe B[e] phenomenon is observed in a wide range of stars at various evolutionary stages. Its nature remains uncertain. The B[e] phenomenon is defined as the simultaneous presence of low-excitation forbidden line emission and strong infrared excess in the
Elena A. Barsukova +3 more
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On the 3He anomaly in hot subdwarf B stars
Open Astronomy, 2017 Decades ago, 3He isotope enrichment in helium-weak B-type main-sequence, in blue horizontal branch and in hot subdwarf B (sdB) stars, i.e., helium-core burning stars of the extreme horizontal branch, were discovered. Diffusion processes in the atmosphere
Schneider David +4 more
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SUBDWARFS: ABUNDANCE OF LIGHT ELEMENTS
Odessa Astronomical Publications, 2017 CNO abundances in the atmospheres of seven metal-deficient stars were derived by model atmosphere method on the basis of high dispersion Echelle spectra obtained using the 6-m telescope of the Special Observatory of the Russian Academy of Sciences. The O
T. V. Mishenina +2 more
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