The Horseshoe nebula of the northern sky - The dark clouds of IC 1396

Details The Horseshoe nebula of the northern sky - The dark clouds of IC 1396 The Horseshoe nebula of the northern sky - The dark clouds of IC 1396

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...149..199h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 149, no. 1, Aug. 1985, p. 199-204.

Astronomy and Astrophysics

Astronomy

10

Hydrogen Clouds, Molecular Clouds, Nebulae, Northern Sky, Radial Velocity, Radio Spectra, Absorption Spectra, Continuous Spectra, H Alpha Line, Interstellar Gas, Radio Sources (Astronomy), Stellar Evolution

Scientific paper

The numerous dark clouds associated with the emission nebula IC 1396 were surveyed in the 6 cm H2CO absorption line. It is shown that the clouds are divided into two groups which approach each other with a typical relative velocity of 10 km s-1. Several clouds show bulk motion differences of a few km s-1 on the scale of the beamwidth (3arcmin). A scenario of the evolutionary interplay of the star and the clouds is suggested which also explains why the exciting star HD 206267 is not situated near the minimum of the radio continuum.

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