W 58 G - A distant H II region in the H I Cygnus arm

Details W 58 G - A distant H II region in the H I Cygnus arm W 58 G - A distant H II region in the H I Cygnus arm

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...190...61g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 190, no. 1-2, Jan. 1988, p. 61-68.

Astronomy and Astrophysics

Astrophysics

6

Cygnus Constellation, Galactic Structure, H I Regions, H Ii Regions, Interstellar Matter, Astronomical Maps, Carbon Monoxide, H Alpha Line, Nebulae

Scientific paper

A 9arcmin×9arcmin sky area centered on the galactic nebula W58 G has been scanned at Hα wavelength with the CIGALE instrument at the prime focus of the 2.6 m Armenian telescope in Byurakan. Four distinct nebular emissions can be distinguished along the same line of sight. Two are related to the nearby Cygnus complex, one at VLSR = 9 km s-1 is associated with the Cygnus Rift at 900 pc and another one at VLSR = 60 km s-1 is probably due to stellar winds or supernova remnants. The third emission, at VLSR = -26 km s-1, is the optical counterpart of the Extended Region South East of W58, mapped by Israel (1976) in the radio continuum, in the Perseus arm (8.4 kpc). The fourth emission comes from W58 G, an H II region which appears to belong to the H I Cygnus arm, with VLSR = -66 km s-1, at a distance of 12.4 kpc.

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