Infrared photometry of the X-ray stars in Cygnus OB2 /VI Cygni/ Preliminary results

Details Infrared photometry of the X-ray stars in Cygnus OB2 /VI Cygni/ Preliminary results Infrared photometry of the X-ray stars in Cygnus OB2 /VI Cygni/ Preliminary results

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ssrv...30..207p&link_type=abstract

(European Space Agency, ESLAB Symposium on X-ray Astronomy, 15th, Amsterdam, Netherlands, June 22-26, 1981.) Space Science Revie

Astronomy and Astrophysics

Astronomy

2

B Stars, Infrared Astronomy, Infrared Photometry, O Stars, Stellar Spectrophotometry, X Ray Sources, Radiant Flux Density, Stellar Luminosity

Scientific paper

Preliminary results are presented of infrared photometry from 2.3 up to 10 and 20 microns of the most luminous stars in VI Cygni. Observations were carried out with a Ge-multifilter system during an observational campaign in September 1980. The Cyg OB2 stars No. 8A, 9, and 12 show weak evidence of mass loss rate, while the mass loss rate obtained from IR observations for Cyg OB2 No. 5 is one of the highest values obtained for Of stars. Magnitudes corrected for air mass are dereddened using the interstellar reddening law and visual extinctions, and the measured fluxes for each star are compared with Kurucz's model atmosphere in order to derive the IR excess.

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