Optical spiral structure at L = 30 deg to 70 deg. I - New observations of distant early-type stars

Details Optical spiral structure at L = 30 deg to 70 deg. I - New observations of distant early-type stars Optical spiral structure at L = 30 deg to 70 deg. I - New observations of distant early-type stars

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89..475f&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 89, April 1984, p. 475-479. Research supported by the Natural Sciences and Engineeri

Astronomy and Astrophysics

Astronomy

6

B Stars, Early Stars, O Stars, Spectral Energy Distribution, Stellar Spectrophotometry, Ubv Spectra, Astronomical Catalogs, Electrophotometers, Main Sequence Stars, Stellar Evolution, Stellar Luminosity, Supergiant Stars

Scientific paper

Photoelectric UBV photometry has been obtained for 86 early-type stars fainter than photographic magnitude 11, within the range of galactic longitude 30° - 70°, and classified as OB+ or OB in the Luminous Stars catalogues of the Hamburg and Warner and Swasey Observatories. MK spectrograms of 68 of these stars have also been obtained. Color excesses and distances are derived for those stars in the sample with spectral types B1.5 V or earlier and/or luminosity class Iab and brighter. Several of the stars observed are B and A supergiants with heliocentric distances in excess of 8 kpc.

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