Distribution of early-type stars and dusty matter in the direction of the stellar cluster NGC 1893

Details Distribution of early-type stars and dusty matter in the direction of the stellar cluster NGC 1893 Distribution of early-type stars and dusty matter in the direction of the stellar cluster NGC 1893

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ap.....50..194h&link_type=abstract

Astrophysics, Volume 50, Issue 2, pp.194-202

Astronomy and Astrophysics

Astrophysics

Stars, Early Type, Dust-Individual, Ngc 1893

Scientific paper

The distribution of 255 O-B9-A2, K-G stars and interstellar dust in the direction of the stellar cluster NGC 1893 is studied using V, B-V, and U-B photometric data. Sixteen groups of stars (associations) are discovered at various distances. The first group includes 9 stars of different spectral classes of later types in the sun’s neighborhood lying at a distance of 110 pc. The next 3 groups, at distances of 420, 890, and 14300 pc, are type B associations and the remaining twelve groups are OB associations. They are designated as Aur 0.11, Aur B 0.43, Aur B 0.89, Aur OB 1.4, Aur OB 2.6, AurOB 3.8, Aur OB 4.6, Aur OB 5.4, Aur OB 6.1, Aur OB 7.4, Aur OB 9.3, Aur OB11.6, Aur OB14.3, Aur OB 17.9, Aur OB 25.9, and Aur OB 31.3. For most of these stars the absorption lies within the range from 0m.45 to 5m.41. Such high absorption may be caused by circumstellar absorption as well as by the diffuse nebula IC 410. The dusty matter is distributed nonuniformly in the Aur 0.11, Aur B 0.43, and Aur B 0.89 associations. There is no dust in the space between the associations. There is essentially no dust within the groups (associations) at distances greater than 0.9 kpc. (See Table 2.)

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