Results 101 to 110 of about 12,394 (217)

RE-CLASSIFICATION OF THE NEGLECTED VARIABLE V480 AQL

Odessa Astronomical Publications, 2014
We present the results of multicoloured photometric study of previously neglected variable star V480 Aql. Our V RI observations prove that this star belongs to classical Cepheids with the period of P = 19d.0016.
N. A. Virnina, N. Maslova, T. Krajci
doaj   +1 more source

Evidence for Evolved Stellar Binary Mergers in Observed B-type Blue Supergiants

The Astrophysical Journal Letters
Blue supergiants are the brightest stars in their host galaxies, and yet their evolutionary status has been a long-standing problem in stellar astrophysics.
Athira Menon, Andrea Ercolino, Miguel A. Urbaneja, Daniel J. Lennon, Artemio Herrero, Ryosuke Hirai, Norbert Langer, Abel Schootemeijer, Emmanouil Chatzopoulos, Juhan Frank, Sagiv Shiber   +10 more
doaj   +1 more source

SPECTRAL LUMINOSITY INDICATORS FOR FGKSUPERGIANTS AND CLASSICAL CEPHEIDS

Odessa Astronomical Publications, 2008
We have determined 28 relations between M ν, T eff and line depths ratios Rλ1/R λ2. These relations have been used for the estimation of the absolute magnitudes M ν of 56 FGK supergiants with an error 0.05-0.30 mag (Table 1).
V. V. Kovtyukh, F. A. Chekhonadskikh
doaj   +1 more source

Red Supergiants—The Other Side of the H-R Diagram

Galaxies
Red supergiants are the largest stars known with some of the highest mass loss rates observed. They are the final stage in the evolution of the majority of massive stars.
Roberta M. Humphreys
doaj   +1 more source

Giants, supergiants, and hypergiants

This is a pre-print of a chapter for the Encyclopedia of Astrophysics (edited by I. Mandel, section editor F.R.N.
openaire   +2 more sources

The population of M-type supergiants in the starburst cluster Stephenson 2

, 2013
The open cluster Stephenson 2 contains the largest collection of red supergiants known in the Galaxy, and at present is the second most massive young cluster known in the Milky Way. We have obtained multi-epoch, intermediate-resolution spectra around the
Clark, J. Simon, Dorda, Ricardo, González-Fernández, Carlos, Marco, Amparo, Negueruela, Ignacio   +4 more
core   +1 more source

ABUNDANCES of Na, Ca, Mg and Al in the ATMOSPHERES of K SUPERGIANTS of the SMALL MAGELLANIC CLOUD

Odessa Astronomical Publications, 2017
The abundances of chemical elements Na, Ca, Mg and Al of the nine K-supergiants in SMC was investigated by a method of models of atmospheres. With this goal the CCD-spectrograms with high resolution was used.
N. S. Komarov, N. S. Zgoniajko, S. V. Vasilyeva   +2 more
doaj   +1 more source

What Physical Factors Influence the Transformation between Blue Supergiants and Red Supergiants?

The Astrophysical Journal
The post-main-sequence evolution of massive stars is highly sensitive to key stellar model parameters, particularly initial rotational velocity and metallicity.
Yun He, Hanfeng Song, Georges Meynet, Andre Maeder, Ruiyu Zhang, Ying Qin, Shitao Qi, Qingli Li, Qiong Zhan   +8 more
doaj   +1 more source

PROPERTIES OF THE SUBGIANTS IN THE ECLIPSING BINARY SYSTEMS OF DIFFERENT TYPES

Odessa Astronomical Publications, 2017
The properties of subgiants from eclipsing binary systems are considered. The necessity of their dividing into different groups on masses and orbital periods is suggested. It allows to find the significant correlations between the main characteristics of
V. G. Karetnikov
doaj   +1 more source

History of two mass loss processes in VY CMa. [PDF]

Proc Int Astron Union, 2023
Quintana-Lacaci G, Velilla L, Fonfría JP, Cernicharo J, Castro-Carrizo A, Agúndez M, Decin L.   +6 more
europepmc   +1 more source