Issue |
A&A
Volume 396, Number 2, December III 2002
|
|
---|---|---|
Page(s) | 533 - 538 | |
Section | Galactic structure, stellar clusters, and populations | |
DOI | https://doi.org/10.1051/0004-6361:20021373 | |
Published online | 03 December 2002 |
A new Wolf-Rayet star in Cygnus*
1
ESO/ST-ECF, Karl-Schwarzschild-Strasse 2, 85748 Garching bei München, Germany
2
ESO, Karl-Schwarzschild-Strasse 2, 85748 Garching bei München, Germany e-mail: fcomeron@eso.org
3
Max-Planck Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany e-mail: gredel@caha.es
4
Departament d'Astronomia i Meteorologia, Universitat de Barcelona, Av. Diagonal 647, 08028 Barcelona, Spain e-mail: jordi@am.ub.es;cesca@am.ub.es
Corresponding author: A. Pasquali, apasqual@eso.org
Received:
22
August
2002
Accepted:
19
September
2002
We report the discovery of a new Wolf-Rayet star in the direction of
Cygnus. The star is strongly reddened but quite bright in the infrared, with
,
and KS = 7.09 (2MASS). On the basis of its
spectrum, we have classified WR 142a a WC8 star. We have estimated its
properties using as a reference those of other WC8 stars in the solar
neighbourhood as well as those of WR 135, whose near-infrared spectrum
is remarkably similar. We thus obtain a foreground reddening of
mag,
,
,
,
K,
,
yr-1. The
derived distance modulus,
mag, places it in a
region occupied by several OB associations in the Cygnus arm, and
particularly in the outskirts of both Cygnus OB2 and Cygnus OB9. The position
in the sky alone does not allow us to unambiguously assign the star to either
association, but based on the much richer massive star content of Cygnus OB2
membership in this latter association appears to be more likely.
Key words: stars: emission line, Be / stars: fundamental parameters / stars: Wolf-Rayet / Galaxy: open clusters and associations: general
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.