2001A&A...373.1009O


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST18:27:52

2001A&A...373.1009O - Astronomy and Astrophysics, volume 373, 1009-1018 (2001/7-3)

Modelling X-ray variability in the structured atmospheres of hot stars.

OSKINOVA L.M., IGNACE R., BROWN J.C. and CASSINELLI J.P.

Abstract (from CDS):

We describe X-ray production in the atmospheres of hot, early-type stars in the framework of a ``stochastic shock model''. The extended envelope of a star is assumed to possess numerous X-ray emitting ``hot'' zones that are produced by shocks and embedded in the ambient ``cold'' medium in dynamical equilibrium. It is shown that the apparent lack of X-ray variability on short (∼ hours) timescales do not contradict a shock model for X-ray production. The character of the X-ray variability is found to depend on the frequency with which hot zones are generated, the cool wind opacity to X-rays, and the wind flow parameters, such as mass loss rate and terminal speed.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: early-type - stars: mass-loss - stars: Wolf-Rayet - X-rays: stars

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 HD 4004 WR* 00 43 28.3971235391 +64 45 35.383738645 10.28 10.718 10.138     WN4-s 182 0
2 * sig Ori Y*O 05 38 44.7665260139 -02 36 00.284709290 2.54 3.58 3.79 3.87 4.11 O9.5V 746 0
3 * zet Ori ** 05 40 45.52666 -01 56 33.2649 0.50 1.56 1.77 1.85 2.05 O9.7Ib+B0III 330 0
4 HD 50896 WR* 06 54 13.0440847499 -23 55 42.020318514 5.74 6.63 6.91 7.74   WN4b 743 0
5 * zet Pup BY* 08 03 35.04754 -40 00 11.3321 0.89 1.98 2.25 2.36 2.58 O4I(n)fp 1097 1

    Equat.    Gal    SGal    Ecl

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2020.10.24-18:27:52

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