Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.134..211k&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 134, no. 2, June 1987, p. 211-217.
Astronomy and Astrophysics
Astronomy
32
Hydrogen Clouds, Infrared Astronomy, Interstellar Matter, O Stars, Ring Structures, Supernovae, Bubbles, Cosmic Dust, Stellar Winds
Scientific paper
A ring-shaped infrared emission region is recognizable on the IRAS Sky Flux Images of a Cepheus region which happens to include the association Cepheus OB 2. The ring is easily visible both at 60 and 100 microns. The approximate galactic coordinates of its centre are l = 102°.8 and b = +6°.7, with an outer diameter of 7 deg. IC 1396 and several other H II regions, such as Sh2-129, Sh2-133, Sh2-134, and Sh2-140 are apparently parts of the ring. If it is assumed that these H II regions are physically connected to the ring its distance must be about 900 pc and its diameter 120 pc. The existence of several arc-shaped Hα filaments along the ring, the proper motion of the nearby runaway star λ Cephei, and the possible presence of th [Fe X] λ6375 interstellar line in the spectra of two stars of Cep OB 2 combine to suggest that the infrared ring might well be a result of a supernova explosion which occurred in this region about 2 - 3 million years ago.
Balazs Lajos G.
Kun Maria
Toth Ignác
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