Results 271 to 280 of about 198,420 (284)

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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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 Radio Stars

Publications of the Astronomical Society of Australia, 1975
During the last few years, a new type of radio object has appeared in the literature: this is the Early Type Emission Line Star, or ETELS for short. These objects are possibly the most interesting radio object discovered since the pulsars. They are certainly more easily understood, since an explanation of their emission processes probably does not ...
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New Emission-Line Stars in OH Clouds

Publications of the Astronomical Society of the Pacific, 1973
Eleven dust clouds exhibiting radio OH lines have been surveyed for Ha emission-line stars. Eight new objects were discovered in four such clouds and none in the remaining seven to a limiting magnitude of m 18. The objects are most likely T Tauri stars.
G. L. Grasdalen, L. V. Kuhi, E. A. Harlan   +2 more
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Emission-Line Stars in the Canis Major Star-Formation Region

Publications of the Astronomical Society of Japan, 1986
Abstract Using the Schmidt telescope of the Kiso Observatory, we have surveyed Hα-emission stars in the Canis Major star-formation region and its adjacent reference area. In the area of about 58 square degrees a total of 179 Hα-emission stars have been found in the magnitude range between K=6 and 15 with a majority in the V = 11–14 range.
Suhardja D. Wiramihardja, Tomokazu Kogure, Makoto Nakano, Shigeomi Yoshida   +3 more
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Flare stars: Postflare behaviour of emission lines

Astrophysics and Space Science, 1984
The problem of the postflare behaviour of chromospheric emission lines in UV Cet-type flare stars is considered. It is shown that the postflare behaviours of different emission lines differ essentially from one another. In particular, the intensity of hydrogen and helium lines must be greatest at flare peak in continuum, while the intensities of 2800 ...
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Two bright peculiar galactic emission-line stars

Publications of the Astronomical Society of the Pacific, 1984
In the course of a survey for galactic-plane, ultraviolet-excess objects, two peculiar emission-lined stars have been detected. One is a newly discovered WC Wolf-Rayet star, designated KPD 0721+0042, which appears to be located in the galactic halo. This peculiar location, as well as the relatively narrow width of the emission lines, argues that the ...
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Observations of Emission-Line Stars

Publications of the Astronomical Society of the Pacific, 1965
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Some Emission-Line G-Type Stars

Publications of the Astronomical Society of the Pacific, 1952
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Emission-Line Variability in Dwarf Stars

Publications of the Astronomical Society of the Pacific, 1950
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