Abstract
view Abstract Citations References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Wolf-Rayet Binary RD 197406. Bracher, Katherine Abstract HD 197406 is a rather faint single-line spectroscopic binary of spectral class WN7, showing fairly narrow emission lines of He II, He I, N Iv, N III, and Si Iv. Spectrograms obtained at Kitt Peak National Observatory in 1964, together with plates taken at Mount Wilson in 1946~9 and remeasured for this investigation, yield a period of 4.3207 days. The resulting velocity curves suggest a zero eccentricity, and rather small values of K. These give a mass function of O.O7o, and a semimajor axis a~ sin i=3.2 X 106 km. Photometric observations at the Goethe Link Observatory show a slight diminution of light (0~.'06) during the half of the cycle when the W star is in front. Assumptions concerning the inclination, based on this eclipse, lead to a suggested mass of 5-70 for the WN7 star, and an absolute magnitude of -1 to -2. Publication: The Astronomical Journal Pub Date: 1966 DOI: 10.1086/110126 Bibcode: 1966AJ.....71S.156B full text sources ADS | data products SIMBAD (1)
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
