Interstellar extinction in the direction of the open cluster IC 348 and the Per OB2 association

Details Interstellar extinction in the direction of the open cluster IC 348 and the Per OB2 association Interstellar extinction in the direction of the open cluster IC 348 and the Per OB2 association

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993balta...2..214c&link_type=abstract

Baltic Astronomy, vol. 2, p. 214

Astronomy and Astrophysics

Astronomy

64

Interstellar Extinction, Open Clusters, Molecular Clouds, O Stars, B Stars, Dark Matter, Astronomical Photometry, Spatial Distribution

Scientific paper

The relationship between interstellar extinction and distance in the direction of dark clouds in the areas around the open cluster IC 348 and the association Per OB2 is determined using the results of photoelectric photometry of 189 stars in the Vilnius photometric system. Two absorbing layers are found. The nearest layer, covering the whole area around IC 348, shows the mean extinction A(V) of about 0.7 mag. It begins at the distance of 160 pc and probably is an extension of the Taurus dark clouds to the northwest. The second absorbing layer has the form of a chain of dark condensations named L1468, L1470, and L1471 and is at 260 pc distance. This layer has a higher density, its mean extinction being about 2.0 mag. The cluster IC 348 is at about the same distance and is physically related to the dark cloud L1470. The distance of the Per OB2 association is found to be 340 pc and the mean extinction of its members is 0.95 mag. A model of the spatial distribution of the Perseus and Taurus dark clouds based on photometric distance determinations in this and previous papers is proposed. Six stars in the IC 348 area are suspected to have emission in the H-alpha line.

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