NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Analysis of the velocity law in the wind of the Be star Lambda PavonisThis paper reanalyzes the IUE spectra of Lambda Pavonis secured in 1982 (Sahade et al.). It is found that the profiles of the broad UV lines are either rotationally broadened or nonrotationally broadened and that the rotationally broadened profiles can be sorted out in two groups characterized by rotational velocity values of 170 km/s and of 210 km/s, respectively. From the analysis of the rotational and of the radial velocities it is possible to distinguish two regions in the extended atmosphere of the star, namely, a region which is rotating and a region which is expanding. In the rotating region, the radial velocities are about zero, and the rotational velocity increases from 170 km/s to 250 km/s. In the expanding region, the rotational energy dissipates, the wind is accelerated to a maximum of -155 km/s, and farther out it decelerates.
Document ID
19900032475
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Chen, Haiqi
(Observatorio Astronomico La Plata, Argentina)
Ringuelet, Adela
(Observatorio Astronomico, La Plata; CONICET, Instituto de Astronomia y Fisica del Espacio Buenos Aires, Argentina)
Sahade, Jorge
(Observatorio Astronomico, La Plata; CONICET, Instituto Argentino de Radioastronomia Villa Elisa, Argentina)
Kondo, Yoji
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
December 15, 1989
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 347
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
90A19530
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available