Mass Segregation in Very Young Open Clusters: A Case Study of NGC 2244 and NGC 6530
نویسندگان
چکیده
منابع مشابه
Probing the age and structure of the nearby very young open clusters NGC 2244 and NGC 2239
The very young open cluster (OC) NGC2244 in the Rosette Nebula was studied with field-star-decontaminated 2MASS photometry, which shows the main-sequence (MS) stars and an abundant pre-MS (PMS) population. Fundamental and structural parameters were derived with colour-magnitude diagrams (CMDs), stellar radial density profiles (RDPs) and mass functions (MFs). Most previous studies centred NGC224...
متن کاملMass Segregation in Very Young Open Clusters
The study of the very young open cluster NGC 6231 clearly shows the presence of a mass segregation for the most massive stars. These observations, combined with those concerning other young objects and very recent numerical simulations, strongly support the hypothesis of an initial origin for the mass segregation of the most massive stars. These results led to the conclusion that massive stars ...
متن کاملThe chemical abundance of the very metal rich old Open Clusters NGC 6253 and NGC 6791 ⋆
Aims. In the framework of a project aiming at deriving in a homogeneous way the properties (age, distance, reddening and detailed chemical abundances) of a large sample of old open clusters, we present here the metal abundance and the abundance ratios of light (C, N, O, Na, Mg, Al, Si, Ca, Ti) and heavier (Cr, Mn, Ni, Ba, Eu) elements in the galactic open clusters NGC 6253 and NGC 6791. Methods...
متن کاملThe overlapping open clusters NGC 1750 and NGC 1758 III . Cluster - field segregation and clusters physical parameters
Cluster-field segregation and determination of physical parameters of the open clusters NGC 1750 and NGC 1758 were performed from CCD and photographic photometric and astrometric surveys previously published by the authors. Membership probabilities were computed to a brightness limit of R = 15 mag through a non-standard method in a fully nonparametric approach, using proper motions, positions a...
متن کاملA photometric study of the two poorly known northern open clusters NGC 133 and NGC 1348 ? , ? ?
We present CCD UBVI observations obtained in the field of the previously unstudied northern open clusters NGC 133 and NGC 1348. We argue that NGC 133 is a heavily contaminated cluster, for which we identify 13 candidate members down to V =14.50 mag on the basis of the position in the two-color Diagram . Membership has been checked against proper motions from Tycho 2, whenever available. The clu...
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: The Astronomical Journal
سال: 2007
ISSN: 0004-6256,1538-3881
DOI: 10.1086/521022