NDLI: Wind variability in intermediate luminosity b supergiants

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Wind variability in intermediate luminosity b supergiants

Content Provider	NASA Technical Reports Server (NTRS)
Author	Massa, Derck
Copyright Year	1996
Description	This study used the unique spectroscopic diagnostics of intermediate luminosity B supergiants to determine the ubiquity and nature of wind variability. Specifically, (1) A detailed analysis of HD 64760 demonstrated massive ejections into its wind, provided the first clear demonstration of a 'photospheric connection' and ionization shifts in a stellar wind; (2) The international 'IUE MEGA campaign' obtained unprecedented temporal coverage of wind variability in rapidly rotating stars and demonstrated regularly repeating wind features originating in the photosphere; (3) A detailed analysis of wind variability in the rapidly rotating B1 Ib, gamma Ara demonstrated a two component wind with distinctly different mean states at different epochs; (4) A follow-on campaign to the MEGA project to study slowly rotating stars was organized and deemed a key project by ESA/NASA, and will obtain 30 days of IUE observations in May-June 1996; and (5) A global survey of archival IUE time series identified recurring spectroscopic signatures, identified with different physical phenomena. Items 4 and 5 above are still in progress and will be completed this summer in collaboration with Raman Prinja at University College, London.
File Size	249521
Page Count	7
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19970012086
Archival Resource Key	ark:/13960/t1qg3n85d
Language	English
Publisher Date	1996-04-26
Access Restriction	Open
Subject Keyword	Astrophysics Stellar Winds Spectroscopy B Stars Time Series Analysis Variability Ultraviolet Spectra Spectroscopic Analysis Abundance Wind Profiles Stellar Luminosity Photosphere Ionization Supergiant Stars Iue Silicon Stellar Rotation Optical Thickness Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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