Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982japa....3..267r&link_type=abstract
Journal of Astrophysics and Astronomy, vol. 3, Sept. 1982, p. 267-276.
Astronomy and Astrophysics
Astrophysics
1
A Stars, Peculiar Stars, Reflection Nebulae, Stellar Spectrophotometry, Energy Distribution, Interstellar Extinction, Line Spectra, Scorpius Constellation, Stellar Color, Stellar Luminosity, Stellar Temperature, Ubv Spectra
Scientific paper
HD 147010, which is in the reflection nebula vdB 102, has been found to be a hot Ap silicon star rather than a normal A supergiant. From the UBV and JHK photometry of the star, color excess E(B-V) of 0.29 and the ratio of total-to-selective absorption R of 4.3 have been obtained. The high value of R implies bigger grain size and also confirms the association of the star with the nebula. The dereddened colors of the star can be fitted to a theoretical energy distribution with an effective temperature of approximately 13,000 + or - 500 K and log g = 3.6 + or - 0.2. HD 147010 has also been found to be a spectrum variable; in particular, lines of Cr II show large intensity variations.
Kameswara Rao N.
Rajamohan R.
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