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Record 32 of 2251
A study of the continuum flux and the line structure in the IUE spectrum of Beta Lyrae
Author and Affiliation:
Aydin, C.(Ankara Univ., Turkey)
Engin, S.(Ankara, University, Turkey)
Brandi, E.(Ankara Univ., Turkey)
Ferrer, O. E.(Observatorio Astronomico, La Plata, Argentina)
Hack, M.(Trieste, Universita, Italy)
et al.
Abstract: A study of the available archival IUE images of Beta Lyrae has led to the following results: (1) for lambda in the range of 1250 - 1500 A, the eclipse depth at second conjunction is slightly larger than the eclipse depth at primary conjunction; they are equal at about 1670 A; (2) the profiles of the resonance lines of SiIV (and the same seems to be true for NV and CIV) can be described as composite, formed by the superposition of a stationary P Cygni profile that suggests a velocity of approach of -170 km/s and a broad, less strong, emission that seems to yield a velocity distribution in antiphase with the velocity curve of the B8 II component of the system; and (3) the emission lines of the intercombination doublet of semiforbidden N II at about 2140 A suggest a velocity of about -130 km/s. The interpretation of the latter composite profile appears similar to the one suggested by Sahade (1966) to describe H-alpha and He I 5876 and He I 6678, and by Batten and Sahade (1973) to describe H-alpha.
Publication Date: Mar 01, 1988
Document ID:
19880048005
(Acquired Nov 28, 1995)
Accession Number: 88A35232
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astronomy and Astrophysics (ISSN 0004-6361); 193; 1-2,; 202-210
Publisher Information: Germany
Contract/Grant/Task Num: NAS5-25774
Financial Sponsor: NASA; United States
Organization Source: Ankara Univ.;
La Plata Observatory;
Trieste Univ.
Description: 9p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ECLIPSING BINARY STARS; IUE; STELLAR SPECTRA; ULTRAVIOLET SPECTRA; CONTINUOUS SPECTRA; FINE STRUCTURE; NITROGEN; RADIAL VELOCITY; RESONANCE LINES
Imprint And Other Notes: Astronomy and Astrophysics (ISSN 0004-6361), vol. 193, no. 1-2, March 1988, p. 202-210. CNR-supported research.
Miscellaneous Notes: CNR-supported resear
Availability Source: Other Sources
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