2015A&A...579A..75T


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.08CEST03:06:09

2015A&A...579A..75T - Astronomy and Astrophysics, volume 579A, 75-75 (2015/7-1)

Potsdam Wolf-Rayet model atmosphere grids for WN stars.

TODT H., SANDER A., HAINICH R., HAMANN W.-R., QUADE M. and SHENAR T.

Abstract (from CDS):

We present new grids of Potsdam Wolf-Rayet (PoWR) model atmospheres for Wolf-Rayet stars of the nitrogen sequence (WN stars). The models have been calculated with the latest version of the PoWR stellar atmosphere code for spherical stellar winds. The WN model atmospheres include the non-LTE solutions of the statistical equations for complex model atoms, as well as the radiative transfer equation in the co-moving frame. Iron-line blanketing is treated with the help of the superlevel approach, while wind inhomogeneities are taken into account via optically thin clumps. Three of our model grids are appropriate for Galactic metallicity. The hydrogen mass fraction of these grids is 50%, 20%, and 0%, thus also covering the hydrogen-rich late-type WR stars that have been discovered in recent years. Three grids are adequate for LMC WN stars and have hydrogen fractions of 40%, 20%, and 0%. Recently, additional grids with SMC metallicity and with 60%, 40%, 20%, and 0% hydrogen have been added. We provide contour plots of the equivalent widths of spectral lines that are usually used for classification and diagnostics.

Abstract Copyright:

Journal keyword(s): stars: evolution - stars: mass-loss - stars: winds, outflows - stars: Wolf-Rayet - stars: atmospheres - stars: massive

Simbad objects: 3

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Number of rows : 3

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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9440 1
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14826 1
3 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1734 1

    Equat.    Gal    SGal    Ecl

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2020.07.08-03:06:09

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