Optical spectra of HDE 245770 = A 0535 + 26

Details Optical spectra of HDE 245770 = A 0535 + 26 Optical spectra of HDE 245770 = A 0535 + 26

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26as...40..289g&link_type=abstract

Astronomy and Astrophysics Supplement Series, vol. 40, June 1980, p. 289-294.

Astronomy and Astrophysics

Astrophysics

46

B Stars, Binary Stars, O Stars, Pulsars, Stellar Spectrophotometry, X Ray Sources, Spectrographs, Spectrum Analysis, Stellar Luminosity, Stellar Magnitude, Stellar Mass, Tables (Data)

Scientific paper

A line identification of the blue spectrum of HDE 245770 is given, and a precise classification of spectral type and luminosity class is provided; the observed wavelength of spectral lines or blends is also tabulated. An analysis of three grating spectra indicates that HDE 245770 is an O9.7 IIIe star at a distance of 1.8 plus or minus 0.6 kpc, with an absolute visual magnitude of -5.1 plus or minus 0.7, and a luminosity of 140,000 solar luminosities. For an effective temperature of 30,000 deg K, the radius is calculated to be 14 solar radii; in addition, a mass of about 15 solar masses is determined.

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