Astronomy and Astrophysics – Astronomy
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...184.0504l&link_type=abstract
American Astronomical Society, 184th AAS Meeting, #05.04; Bulletin of the American Astronomical Society, Vol. 26, p.863
Astronomy and Astrophysics
Astronomy
Scientific paper
We have used the Goddard High Resolution Spectrometer on HST to study the wind of the hybrid-chromosphere star alpha TrA (K2 IIb-IIIa). The stellar wind is detected by the absorption seen against the chromospheric Mg II resonance lines (h and k) centered at 2795.53 Angstroms and 2802.70 Angstroms. Spectra obtained with the high spectral resolution (lambda /Delta lambda =84,750) and low scattered light properties of the GHRS echelle grating reveal stellar Mg II emission lines with complex interstellar absorption and a broad wind absorption feature centered at --90 km s(-1) . We infer the Mg II opacity as a function of velocity and derive velocity laws for the stellar wind by comparing the observed line profiles with synthetic profiles computed for a range of wind parameters. We also discuss the origin of the observed broad lines of Si III], C III], and C IV. This work is supported by NASA Interagency Transfer S-56460-D to the National Institute of Standards and Technology.
Brown Adrian
Harper Graham M.
Linsky Jeffrey L.
Wood Bernard
No associations
LandOfFree
Wind Velocity and Density Laws for the Hybrid-Chromosphere Star alpha TrA obtained from GHRS Spectra 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 Wind Velocity and Density Laws for the Hybrid-Chromosphere Star alpha TrA obtained from GHRS Spectra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wind Velocity and Density Laws for the Hybrid-Chromosphere Star alpha TrA obtained from GHRS Spectra will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-880758