| Issue |
A&A
Volume 418, Number 3, May II 2004
|
|
|---|---|---|
| Page(s) | L31 - L34 | |
| Section | Letters | |
| DOI | https://doi.org/10.1051/0004-6361:20040124 | |
| Published online | 16 April 2004 | |
Letter to the Editor
The distance to the Pleiades from orbital solution of the double-lined eclipsing binary HD 23642 *,**
1
INAF Osservatorio Astronomico di Padova, Sede di Asiago, 36012 Asiago (VI), Italy
2
Via Filzi 9, 38034 Cembra (TN), Italy
3
Astrophysical Observatory of the Dept. of Astronomy, Univ. of Padova, 36012 Asiago (VI), Italy
4
Observatoire Aquitain des Sciences de l'Univers, CNRS UMR 5804, BP 89, 33270 Floirac, France
Corresponding author: U. Munari, munari@pd.astro.it
Received:
27
February
2004
Accepted:
18
March
2004
Combining precise B, V photometry and radial velocities, we have
been able to derive a firm orbital solution and accurate physical parameters
for the newly discovered eclipsing binary HD 23642 in the Pleiades open
cluster. The resulting distance to the binary and therefore to the cluster
is 132 ± 2 pc. This closely confirms the distance modulus obtained by
classical main sequence fitting methods (
5.60 or 132 pc), moving
cluster techniques and the astrometric orbit of Atlas. This is the first
time the distance to a member of the Pleiades is derived by orbital solution
of a double-lined eclipsing binary, and it is intended to contribute to the
ongoing discussion about the discordant Hipparcos distance to the cluster.
Key words: stars: binaries: eclipsing / stars: distances / stars: fundamental parameters / stars: individual: HD 23642 / stars: HR and C-M diagrams / Galaxy: open clusters and associations: individual: Pleiades
© ESO, 2004
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