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1998A&AS..127..423P - Astron. Astrophys., Suppl. Ser., 127, 423-432 (1998/February-1)
Fundamental parameters of the highly reddened young open clusters Westerlund 1 and 2.
PIATTI A.E., BICA E. and CLARIA J.J.
Abstract (from CDS):
We study the compact open clusters Westerlund1 (BH197) and Westerlund2. We present CCD integrated spectroscopy for both clusters, and CCD imaging in the V and I bands for the former one. So far, Westerlund1 is possibly the most reddened open cluster studied in detail (Av≃13.0). It has an age of 8±3Myr and a distance from the Sun of d☉≃1.0±0.4kpc. For Westerlund2 we derive a visual absorption AV≃5.0mag, an age of 2-3Myr, and d☉=5.7±0.3kpc. From luminosity and structural arguments we conclude that Westerlund1, although young and compact, it is a massive cluster, in contrast to Westerlund2.
Abstract Copyright: ∼
Journal keyword(s): open clusters: individual: Cl Westerlund 1, Cl Westerlund 2 - open clusters: general
VizieR on-line data: <Available at CDS (J/A+AS/127/423): table>
Nomenclature: Table: Cl* Westerlund 1 PBC NNN (Nos 1-233)
Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.
Simbad objects: 31
