A large-scale dark-cloud system in the northern sky

Details A large-scale dark-cloud system in the northern sky A large-scale dark-cloud system in the northern sky

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...137..287s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 137, no. 2, Aug. 1984, p. 287-290. In German.

Astronomy and Astrophysics

Astrophysics

8

Cosmic Dust, Interstellar Matter, Milky Way Galaxy, Northern Sky, Astronomical Photography, Galactic Structure, Nebulae

Scientific paper

Wide-angle photographs of the northern Milky Way reveal a complex system of dark clouds covering the galactic longitudes from l = 90° to about 210°. This Northern Dark Cloud System (NDS) is a coherent structure of individual clouds of preferentially cellular appearance. The Northern Dark Cloud System has to be assigned to the local spiral arm. This is substantiated by the large extent of the NDS in galactic latitudes and by a b(l)-behaviour similar to that of well established tracers of the local spiral arm. With a descending node of l = 145° and an inclination of i = 17° against the galactic equator it agrees well with other young objects belonging to the local arm. A dominant contribution of +I(=Perseus-arm) dust can be excluded since that arm is characterized by a descending node of l = 100° (Kolesnik and Vedenicheva, 1979).

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