Results 251 to 260 of about 11,496,581 (289)

Isophot Observations of Early-Type Stars

Astrophysics and Space Science, 1997
Mass loss has an important effect on the evolution of early-type stars. The most reliable mass loss rates are determined from the radio continuum. However there is a wealth of observational evidence (Discrete Absorption Components, X-rays, IR continuum, Hα variability, …) indicating that the stellar wind is clumped.
R. Blomme, M.C. Runacres, K. Vyverman, M. Cohen, C. Leitherer, S. P. Owocki, M. Haas   +6 more
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Emission-line Stars and Early-type Stars with Gaia

EAS Publications Series, 2010
Gaia will provide accurate parallaxes, spectrophotometry and spectroscopy for hundreds of thousands of emission-line stars across the whole HR diagram. In preparation for the Gaia mission, we are developing algorithms to recognize and classify emission-line stars. A large collection of ground-based spectroscopic observations has been collected and will
R. Blomme, Y. Frémat, A. Lobel, C. Martayan   +3 more
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Early-type Emission-line Stars

2007
Wolf-Rayet (WR) stars owe its name to the discoverers, C. Wolf and G. Rayet. They are one of the most conspicuous stellar objects in spectral features, activities, and in the processes of stellar evolution. They are spectroscopically characterized by the following features.
Tomokazu Kogure, Kam-Ching Leung
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Early type stars with abnormal spectra

Vistas in Astronomy, 1974
Abstract One of the areas which have received a great deal of attention in recent years is the field of the so-called early type peculiar stars. It seems that a review paper on the subject could be of some use, since it helps to visualize both the problems which have been solved and those which have not been solved or studied yet.
Mercedes Jaschek, Carlos Jaschek
openaire   +1 more source

Early-Type Emission-Line Stars

1982
Early-type emission-line stars keep the continuous interest of the scientists. As it is believed the emission lines are formed in the extensive envelopes surrounding these stars. The various objects of this sort could be generally grouped into the following classes: a) the Of stars; b) the Wolf-Rayet stars; c) the Be-stars; d) the Shell stars; e) the B-
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X-ray properties of early-type stars in the Tarantula Nebula from T-ReX

Monthly Notices of the Royal Astronomical Society, 2022
Paul Crowther, Leisa K Townsley, Patrick S Broos   +2 more
exaly  

Stellar Winds of Early-Type Stars

2002
Previous work on IRAS observations showed inhomogen- eities ("clumping") to be present in the wind of some early- type stars. To study this in more detail, we obtained ISOPHOT data at 60, 90 and 160 m for 1 LBV, 2 B-type stars and 5 Wolf-Rayets. The ISOPHOT data consist of P32 oversampled maps, which show a strong and highly structured background ...
Blomme, Ronny, Runacres, Mark
openaire   +1 more source

Overstable convective modes in rotating early-type stars

Monthly Notices of the Royal Astronomical Society, 2021
Umin Lee
exaly  

Rotation and activity in early-type stars

Proceedings of the International Astronomical Union
Abstract Space photometry from the Kepler and TESS missions has resulted in the discovery of a large number of A and B stars with light variations consistent with rotation and starspots.
openaire   +1 more source

The magnetic early B-type Stars II: stellar atmospheric parameters in the era of Gaia

Monthly Notices of the Royal Astronomical Society, 2019
John Wisniewski, Veronique Petit, Thomas Rivinius   +2 more
exaly