Propagating absorption enhancements in the wind of the extreme Of supergiant HD 151804

Details Propagating absorption enhancements in the wind of the extreme Of supergiant HD 151804 Propagating absorption enhancements in the wind of the extreme Of supergiant HD 151804

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...390..650f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 390, no. 2, May 10, 1992, p. 650-660. Research supported by NSERC, McDonald

Astronomy and Astrophysics

Astrophysics

25

B Stars, Stellar Mass Ejection, Stellar Spectra, Stellar Winds, Supergiant Stars, Emission Spectra, Line Spectra, Spectrum Analysis, Time Series Analysis

Scientific paper

Variations in the shape, position, and strength of the absorption trough of the He I 5876 P Cygni profile have been detected in high-quality Reticon spectra of the extreme Of supergiant HD 151804. These changes are primarily caused by the propagation of absorption enhancements through the trough of the profile. The short time series presented here is dominated by the progressive motion of two enhancement episodes, one of which could be traced for four consecutive days as it accelerated blueward from an initial velocity of -180 km/s to -700 km/s. The acceleration of this enhancement was less than 25 percent of the acceleration expected for the ambient stellar wind. The absorption enhancements could be due to either density enhancements that propagate through the wind or to extended velocity plateaus through which the material of the wind flows. Both of these interpretations are discussed briefly, and the behavior of the absorption enhancements is compared with the behavior of the discrete absorption components that are frequently seen in P Cygni profiles of UV resonance lines.

Affiliated with

Also associated with

No associations

Rating

Propagating absorption enhancements in the wind of the extreme Of supergiant HD 151804 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Propagating absorption enhancements in the wind of the extreme Of supergiant HD 151804, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Propagating absorption enhancements in the wind of the extreme Of supergiant HD 151804 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1514749