Results 31 to 40 of about 528,312 (296)

Cool Stars 20 Abstract Booklet

, 2018
booklet for the 20th Cambridge Workshops of Cool Stars, Stellar Systems and the Sun, held July 29 - Aug 3 2018 at Boston University, Boston, MA ...
Cool Stars 20 Organizing Committee (8223375), Cool Stars 20 Organizing Committee   +1 more
core   +1 more source

RESULTS OF LONG-TERM OBSERVATIONS OF EARLY-TYPE STARS WITH CIRCUMSTELLAR SHELLS

Odessa Astronomical Publications, 2017
The results of UBVRIJHK photometric, RI polarimetric, and spectral observations of three Herbig Be stars MWC 137, MWC 297, and MWC 1080 are presented. Brightness variability and spectral features are analyzed.
Yu. K. Bergner, A. S. Miroshnichenko, R. V. Yudin, D. B. Mukanov   +3 more
doaj   +1 more source

The Mass–Temperature Relation for B and Early A Stars Based on International Ultraviolet Explorer Spectra of Detached Eclipsing Binaries

The Astronomical Journal, 2023
Ultraviolet spectra were taken of 25 detached eclipsing binaries (DEBs) with spectral types O, B, and early A with the International Ultraviolet Explorer satellite in the 1150–1900 Å region. The spectra were compared with BOSZ model atmospheres.
Nancy Remage Evans, Mckenzie G. Ferrari, Joanna Kuraszkiewicz, Steven Silverberg, Joy Nichols, Guillermo Torres, Makenzi Fischbach   +6 more
doaj   +1 more source

Mass Loss from Cool Stars [PDF]

Annual Review of Astronomy and Astrophysics, 1981
AbstractRecently obtained spectroscopic observations indicating mass loss in cool stars are reviewed with analogies to the solar atmosphere. Spectral diagnostics of mass loss are discussed with new theoretical calculations of chromospheric line profiles.
openaire   +1 more source

A constant upper luminosity limit of cool supergiant stars down to the extremely low metallicity of I Zw 18

Astronomy & Astrophysics
Stellar wind mass loss of massive stars is often assumed to depend on their metallicity Z. Therefore, evolutionary models predict that massive stars in lower-Z environments are able to retain more of their hydrogen-rich layers and evolve into brighter ...
Schootemeijer Abel, Götberg Ylva, Langer Norbert, Bortolini Giacomo, Hirschauer Alec S., Patrick Lee   +5 more
doaj   +1 more source

High Accuracy Molecular Line Lists for Studies of Exoplanets and Other Hot Atmospheres

Frontiers in Astronomy and Space Sciences, 2022
The desire to characterize and model the atmospheres of the many extrasolar planets that have been discovered over the last three decades is a major driver of current astronomy.
Jonathan Tennyson, Sergey N. Yurchenko
doaj   +1 more source

Ultraviolet spectroscopy of cool stars

Journal of the Optical Society of America B, 1988
A review is given of some developments in the study of UV emission-line spectra of cool stars, including the Sun, in recent years. Although early work on solar-line identifications depended heavily on compilations of energy levels from laboratory studies [ Natl. Stand. Ref. Data Ser. Natl. Bur. Stand.35 ( 1971);Natl. Bur. Stand. (U.S.) Circ.488 ( 1950,
openaire   +2 more sources

THE COOL GIANT STARS AND CHEMICAL EVOLUTION OF GALAXY

Odessa Astronomical Publications, 2017
The fundamental characteristics and abundances of cool giant stars is discussed. The possible evolution of nuclides in process evolution of Galaxy was very shortly described.
N. S. Komarov, T. V. Shevchuk
doaj   +1 more source

Surface magnetism of cool stars [PDF]

, 2016
Summary of the splinter session "Surface Magnetism of Cool Stars" at the Cool Stars 19 conference; to be published in Astronomische NachrichtenInternational audienceMagnetic fields are essential ingredients of many physical processes in the interiors ...
Fares, R.,, Folsom, C. P., Rosen, L., R. Fares, Jeffers, S. V.,, P. Petit, Carroll, T. A.,, Monnier, J. D., Petit, P., Kochukhov, Oleg, Roettenbacher, R. M., R. M. Roettenbacher, Rosén, Lisa,, D. Shulyak, Roettenbacher, Rachael M.,, L. Rosén, J. Morin, J. D. Monnier, Rosen, Julia L., Korhonen, H.,, C. P. Folsom, Korhonen, H., Morin, J., Kochukhov, Oleg,, Strassmeier, K. G., Jeffers, Sandra V., Fares, R., Shulyak, D., O. Kochukhov, S. V. Jeffers, Petit, P.,, H. Korhonen, Morin, Julien, Strassmeier, K. G.,, Monnier, J. D.,, K. G. Strassmeier, Carroll, T. A., Morin, J.,, Kochukhov, O., Monnier, J.D., Shulyak, D.,, Roettenbacher, R. M.,, Jeffers, S. V., Folsom, C. P.,, T. A. Carroll   +44 more
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Evolution from the nuclides to the chemical elements

Odessa Astronomical Publications, 2017
The chemical evolution of Universe and it's objects (from grains to black holes) were of main goal of recent reviews and investigations. The evolution of chemical elements and their isotopes (early nuclides) discussed as indicator of evolution of ...
N. S. Komarov
doaj   +1 more source