Results 31 to 40 of about 12,394 (217)
Highlights of Astronomy, 1980 AbstractThe main data concerning the amplitudes and periods of super-giant variations are reviewed. The period-luminosity-colour relation of intermediate-term variations is compatible with pulsation motions. The Q-values seem to be larger than those corresponding to the fundamental mode and there are arguments favouring non-radial oscillations.
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Semi-analytical Formulas for the Fundamental Parameters of Galactic Early B Supergiants [PDF]
Serbian Astronomical Journal, 2009 The publication of new tables of calibration of some fundamental parameters of Galactic B0-B5 supergiants in the two classes $I_mathrm{a}$ and $I_mathrm{b} $ allows to particularize the eight parameters conjecture that model five fundamental ...
Zaninetti, L.
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Chemical composition of B-type supergiants in the OB8, OB10, OB48, OB78 associations of M31 [PDF]
, 2002 Absolute and differential chemical abundances are presented for the largest group of massive stars in M31 studied to date. These results were derived from intermediate resolution spectra of seven B-type supergiants, lying within four OB associations ...
Becker +59 more
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A catalog of known Galactic K-M stars of class I, candidate RSGs, in Gaia DR2 [PDF]
, 2019 We investigate individual distances and luminosities of a sample of 889 nearby candidate red supergiants with reliable parallaxes (plx/plxerr > 4 and RUWE < 2.7) from Gaia DR2. The sample was extracted from the historical compilation of spectroscopically
Brown, Anthony G. A, Messineo, Maria
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The Astrophysical Journal, 1974 It is pointed out that the energy radiated by HD 101584 (F2e Iap) at IR frequencies cannot be convincingly explained by thermal reradiation from atmospheric grains. It is theorized that this energy emission can be explained by assuming that the F supergiant has an M supergiant companion responsible for IR radiation.
Roberta M. Humphreys, E. P. Ney
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A Census of the Most Luminous Stars. I. The Upper HR Diagram for the Large Magellanic Cloud
The Astronomical Journal, 2023 Spectral classification and multiwavelength photometry for the most luminous stars in the LMC has greatly increased due to several recent surveys for both the hottest and coolest members.
John C. Martin, Roberta M. Humphreys
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The VLT-FLAMES Tarantula Survey XIX. B-type Supergiants - Atmospheric parameters and nitrogen abundances to investigate the role of binarity and the width of the main sequence [PDF]
, 2015 TLUSTY non-LTE model atmosphere calculations have been used to determine atmospheric parameters and nitrogen (N) abundances for 34 single and 18 binary B-type supergiants (BSGs).
Apellániz, J. Maíz +21 more
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Fundamental Parameters of Massive Stars [PDF]
, 2003 We discuss the determination of fundamental parameters of `normal' hot, massive OB-type stars, namely temperatures, luminosities, masses, gravities and surface abundances.
Crowther, Paul A
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Variability Survey of Massive Stars in OB-Associations: Preliminary Results on the Cygnus Region
Open Astronomy, 2012 We present V - and I-passband photometry of massive stars in the Cyg OB1 and Cyg OB2 associations, based on about 80 observing nights spanning 300 days in the 2011 season. The variability of 22 supergiants and 48 OB-stars with luminosity classes III-V is
Laur J. +4 more
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Entropy, 2015 The entropy production (inside the volume bounded by a photosphere) of main-sequence stars, subgiants, giants, and supergiants is calculated based on B–V photometry data. A non-linear inverse relationship of thermodynamic fluxes and forces as well as an
Leonid M. Martyushev, Sergey N. Zubarev
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