Fundamental parameters of the highly reddened young open clusters Westerlund 1 and 2
نویسندگان
چکیده
منابع مشابه
On the highly reddened members in 6 young galactic star clusters - a multiwavelength study ⋆
The spectral and reddening properties of 211 highly reddened proper motion members with V < 15 mag in 6 young galactic star clusters are investigated using low resolution spectroscopic, broad-band UBV RIJHK and mid-IR data. We report emission features in CaII HK and HI lines for a sample of 29 stars including 11 stars reported for the first time and also provide either a new or more reliable sp...
متن کاملFundamental parameters of six neglected old open clusters
In this paper we present the first BV I CCD photometry of six overlooked old open clusters (Berkeley 44, NGC 6827, Berkeley 52, Berkeley 56, Skiff 1 and Berkeley 5) and derive estimates of their fundamental parameters by using isochrones from the Padova library (Girardi et al. 2000). We found that all the clusters are older than the Hyades, with ages ranging from 0.8 (NGC 6827 and Berkeley 5) t...
متن کامل2 BOAO PHOTOMETRIC SURVEY OF GALACTIC OPEN CLUSTERS . II . Physical Parameters of 12 Open Clusters
Received ; accepted – 2 – ABSTRACT We have initiated a long-term project, the BOAO photometric survey of open clusters, to enlarge our understanding of galactic structure using UBV I CCD photometry of open clusters which have been little studied before. This is the second paper of the project in which we present the photometry of 12 open clusters. We have determined the cluster parameters by fi...
متن کاملMedium resolution 2 . 3 μ m spectroscopy of the massive Galactic open cluster Westerlund 1 ⋆
The Galactic open cluster Westerlund 1 was found only a few years ago to be much more massive than previously thought, with evidence suggesting its mass to be in excess of ∼10 5 M ⊙ , in the range spanned by young extragalactic star clusters. Unlike those clusters its proximity makes spatially resolved studies of its stellar population feasible. It is therefore the ultimate template for a young...
متن کاملModel-Independent Diagnostics of Highly Reddened Milky Way Star Clusters: Age Calibration (Research Note)
Context. The next generation nearand mid-infrared Galactic surveys will yield a large number of new highly obscured star clusters. Detailed characterization of these new objects with spectroscopy is time-consuming. Aims. Diagnostic tools that will be able to characterize clusters based only on the available photometry will be needed to study large samples of the newly found objects. Methods. Th...
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics Supplement Series
سال: 1998
ISSN: 0365-0138,1286-4846
DOI: 10.1051/aas:1998111