Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...408..573w&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 408, no. 2, p. 573-578.
Astronomy and Astrophysics
Astrophysics
16
B Stars, Infrared Absorption, Infrared Photometry, Interstellar Extinction, Interstellar Matter, Molecular Clouds, Astronomical Photometry, Gum Nebula, Stellar Luminosity, Stellar Winds, Ultraviolet Radiation
Scientific paper
Near-IR photometry for the B-type main-sequence star HD 62542 is presented and employed to investigate the interstellar extinction curve in the wavelength range 0.44-3.5 microns. The ratio of total to selective extinction is deduced to be R(V) = 3.24 +/- 0.05, very similar to the average value for diffuse clouds. From the resulting visual extinction (A(V) = 1.20 +/- 0.08) and an assessment of the literature on the spectral type and luminosity of the star, a distance of 405 +/- 35 pc is derived. The normality of the extinction law in the visible and near-IR is in marked contrast to the anomalous UV extinction. These results support the hypothesis that the complex formed as an accumulation of diffuse cloud material swept up by stellar winds and radiation.
Fitzpatrick Edward L.
Martin Peter G.
Massa Derck
Whittet Doug C. B.
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