NGC 7139 and its stellar neighbourhood

Details NGC 7139 and its stellar neighbourhood NGC 7139 and its stellar neighbourhood

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...191..297w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 191, no. 2, Feb. 1988, p. 297-302.

Astronomy and Astrophysics

Astrophysics

4

Astronomical Photometry, Planetary Nebulae, Stellar Systems, Galactic Structure, Line Spectra, Oxygen, Radial Velocity, Ubv Spectra

Scientific paper

Photographic photometry and a rough spectral classification were carried out for many stars in the angular vicinity of the planetary nebula NGC 7139. The extinction-distance method was applied and led to a distance of 2.4 kpc for the planetary. Several highly reddened early-type stars appear to be located beyond the Perseus arm. In the [O III] 5007 Å line, observations of NGC 7139 with a Fabry-Pérot interferometer led to an expansion velocity of 20 km s-1 and a heliocentric radial velocity of -73.3±3 km s-1.

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