Recurrent episodic mass loss in a B2e star - 66 Ophiuchi, 1982-1985

Abstract

view Abstract Citations (24) References (22) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Recurrent Episodic Mass Loss in a B2e Star: 66 Ophiuchi, 1982--1985 Grady, C. A. ; Sonneborn, George ; Wu, Chi-Chao ; Henrichs, H. F. Abstract The results of three intensive ultraviolet monitoring campaigns for 66 Oph in September-October 1982, September 1983, and September 1984, supplemented by the available IUE archival data from April, 1982 to June, 1985 are reported. The stellar wind went through at least two and probably three episodes of weak-wind absorption. At wind minimum, the resonance profiles and equivalent widths of C IV, Si IV, Si III, and Al III are similar to those observed in normal B stars of comparable luminosity, effective temperature, and v sin i. The strong-wind absorption profiles show one or more shortward-shifted discrete components superposed upon the weak-wind absorption profiles. Significant profile variations are seen on time scales spanning over two orders of magnitude, ranging from small-amplitude changes detected on time scales of hours to the transitions from wind minimum to maximum, which take months. Publication: The Astrophysical Journal Supplement Series Pub Date: December 1987 DOI: 10.1086/191239 Bibcode: 1987ApJS...65..673G Keywords: B Stars; Metallic Stars; Satellite Observation; Stellar Mass Ejection; Stellar Spectra; Iue; Line Spectra; Linear Polarization; Ultraviolet Spectroscopy; Astrophysics; LINE PROFILES; STARS: BE; STARS: INDIVIDUAL CONSTELLATION NAME: 66 OPHIUCHI; STARS: MASS LOSS; ULTRAVIOLET: SPECTRA full text sources ADS | data products SIMBAD (5) MAST (1)