INVESTIGADORES
PIATTI Andres Eduardo
artículos
Título:
Fundamental parameters of the highly reddened young open clusters Westerlund 1 and 2
Autor/es:
PIATTI, ANDRÉS E.; BICA, EDUARDO; CLARIA OLMEDO, JUAN JOSÉ
Revista:
ASTRONOMY & ASTROPHYSICS. SUPPLEMENT SERIES (PRINT)
Referencias:
Año: 1998 vol. 127 p. 423 - 432
ISSN:
0365-0138
Resumen:
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 +/- 3 Myr and a distance from the Sun of d_sun ~ 1.0 +/- 0.4 kpc. For Westerlund2 we derive a visual absorption AV~ 5.0 mag, an age of 2-3 Myr, and d_sun=5.7+/- 0.3 kpc. From luminosity and structural arguments we conclude that Westerlund1, although young and compact, it is a massive cluster, in contrast to Westerlund2.
