Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.112..251s&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 112, no. 2, May 1985, p. 251-257.
Astronomy and Astrophysics
Astrophysics
18
B Stars, Electrophotometry, Molecular Clouds, Stellar Spectrophotometry, Taurus Constellation, Infrared Spectra, Interstellar Extinction, Spectral Energy Distribution, Ultraviolet Spectra
Scientific paper
Photoelectric Vilnius photometry of the B-type stars HD 29647 and HDE 283809 in the direction of the Taurus molecular cloud indicates their brightness and energy distribution to be constant within 1 - 2%. The interstellar extinction law is determined for the star HDE 283809 from the photometry data in the Vilnius and UBVRJHKL systems. The interstellar extinction law for the two stars is found to be the same in the infrared, however, it is very different in the near ultraviolet. The new spectra of HDE 283809 confirm the earlier classification and indicate an absence of emission in the hydrogen lines. The observed peculiarities of the energy distribution in the spectrum of HDE 283809 apparently originate in interstellar or circumstellar dust, not in the star itself.
Cernis Kazimieras
Hayes Donald S.
Straizys Vytautas
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