Abstract
view Abstract Citations (75) References (31) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Tomographic Separation of Composite Spectra. II. The Components of 29 UW Canis Majoris Bagnuolo, William G., Jr. ; Gies, Douglas R. ; Hahula, Michael E. ; Wiemker, Rafael ; Wiggs, Michael S. Abstract We have analyzed the UV photospheric lines of 29 CMa, a 4.39 day period, double-lined O-type spectroscopic binary. Archival data from International Ultraviolet Explorer (IUE)(28 spectra well distributed in oribital phase) were analyzed with several techniques. We find that the mass ratio is q = 1.20 +/- 0.16 (secondary more massive) based on three independent arguments. A tomography algorithm was used to produce the separate spectra of the two stars in six UV spectral regions. The MK spectral classifications of the primary and secondary, O7.5-8 Iab and O9.7 Ib, respectively, were estimated through a comparison of UV line ratios with those in spectral standard stars. The flux ratio of the stars in the UV is 0.36 +/- 0.07 (primary brighter). The primary has a strong P Cygni NIV wavelength 1718 feature, indicating a strong stellar wind. We also present tomographic reconstructions of visual spectral data in the range 4300-4950 A, based on seven observations of differing orbital phases, which confirm the UV classifications, and show that the primary is an Of star. From the spectral classifications, we estimate the temperatures of the stars to be 33,750 K and 29,000 K for primary and secondary, respectively. We then fit visual and UV light curves and show that reasonably good fits can be obtained with these temperatures, a semicontact configuration, an inclination of 74 deg. +/- 2 deg., and an intensity ratio r is less than 0.5. Publication: The Astrophysical Journal Pub Date: March 1994 DOI: 10.1086/173822 Bibcode: 1994ApJ...423..446B Keywords: Binary Stars; Light Curve; Stellar Models; Tomography; Ultraviolet Astronomy; Line Spectra; Stellar Temperature; Stellar Winds; Transfer Functions; Astrophysics full text sources ADS | data products SIMBAD (2) MAST (1) INES (1) Related Materials (10) Part 1: 1992ApJ...385..708B Part 3: 1995ApJ...448..878T Part 4: 1997ApJ...483..439P Part 5: 1997ApJ...485..350L Part 6: 1999ApJ...518..450P Part 7: 2001ApJ...548..889P Part 8: 2002ApJ...565.1216H Part 9: 2002ApJ...575.1050P Part 10: 2002ApJ...574..957G Part 11: 2008ApJ...681..554P
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