Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as...97..755t&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 97, no. 3, p. 755-767.
Astronomy and Astrophysics
Astrophysics
16
B Stars, Interstellar Extinction, Open Clusters, Stellar Envelopes, Stellar Spectrophotometry, Color-Color Diagram, Color-Magnitude Diagram
Scientific paper
A photometric study of the Roslund 3 cluster is presented whose B6-B9 member stars exhibit the evidence for the presence of circumstellar extinction. The cluster is about 9 x 10 exp 7 yrs old, 2.29 +/-0.05 kpc distant, with a radial velocity of -2.6 +/-1.1 km/s, and is estimated to contain roughly 294 +/-36 solar masses of late B, A, and lower-mass stars within its 10.0 +/-0.7 pc tidal radius. It is hypothesized that an excess reddening for cluster B7-B9 stars originates in circumstellar dust rings located around the equatorial regions of late B stars, which are rotating at close to breakup velocity. The phenomenon may be related to beta Pictoris-type dust rings.
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