Luminosity and Mass Function of the Galactic open cluster NGC 2422
نویسندگان
چکیده
منابع مشابه
ROSAT PSPC / HRI observations of the open cluster NGC 2422
We present the results of a ROSAT study of NGC 2422, a southern open cluster at a distance of about 470 pc, with an age close to the Pleiades. Source detection was performed on two observations, a 10-ksec PSPC and a 40-ksec HRI pointing, with a detection algorithm based on wavelet transforms, particularly suited to detecting faint sources in crowded elds. We have detected 78 sources, 13 of whic...
متن کاملSpatial dependence of 2 MASS luminosity and mass functions in the old open cluster NGC 188
Luminosity and mass functions in the old open cluster NGC 188 are analysed by means of J and H 2MASS photometry, which provides uniformity and spatial coverage for a proper background subtraction. With an age of about 6–8 Gyr, NGC 188 is expected to be suffering the effects of advanced dynamical evolution. Indeed, previous works in optical bands have suggested the presence of mass segregation. ...
متن کاملLuminosity and mass functions for the galactic globular cluster NGC 3201 ?
Luminosity and mass functions for NGC3201 down to ∼ 0.3M are derived from BV color–magnitude diagrams in different fields containing about ∼ 13 000 stars. We studied data for three independent fields observed with the NTT and 3.6m ESO telescopes and the derived mass functions are all in agreement with each other. Comparison with the data published in the literature have shown a fairly good agre...
متن کاملThe spatial distribution and luminosity function of the open cluster NGC 4815
NGC 4815 is a distant and populous open cluster, which lies in the galactic plane in a region of strong absorption. As a consequence, its membership, spatial distribution and luminosity function are not well determined. In this paper, we present an algorithm which uses both positional and photometric data simultaneously to search for open cluster members. The contribution of the field stars is ...
متن کاملThe Luminosity and Mass Function of the Globular Cluster NGC 1261 ⋆
I-band CCD images of two large regions of the Galactic globular cluster NGC 1261 have been used to construct stellar luminosity functions (LF) for 14000 stars in three annuli from 1. ′ 4 from the cluster center to the tidal radius. The LFs extend to M I ∼ 8 and tend to steepen from the inner to the outer annulus, in agreement with the predictions of the multimass King–Michie model that we have ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2003
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20030524