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Title:
A systematic survey for infrared star clusters with |b| <20° using 2MASS
Authors:
Froebrich, D.; Scholz, A.; Raftery, C. L.
Affiliation:
AA(Dublin Institute for Advanced Studies, 5 Merrion Square, Dublin 2, Ireland; Centre for Astrophysics and Planetary Science, The University of Kent, Canterbury, CT2 7NH), AB(University of Toronto, 60 St George Street, Toronto, Canada), AC(Trinity College Dublin, College Green Dublin 2, Ireland)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 374, Issue 2, pp. 399-408. (MNRAS Homepage)
Publication Date:
01/2007
Origin:
MNRAS
MNRAS Keywords:
methods: statistical , globular clusters: general , open clusters and associations: general
DOI:
10.1111/j.1365-2966.2006.11148.x
Bibliographic Code:
2007MNRAS.374..399F

Abstract

We used star density maps obtained from the Two-Micron All-Sky Survey (2MASS) to obtain a sample of star clusters in the entire Galactic Plane with |b| < 20°. A total of 1788 star cluster candidates are identified in this survey. Among those are 681 previously known open clusters and 86 globular clusters. A statistical analysis indicates that our sample of 1021 new cluster candidates has a contamination of about 50per cent. Star cluster parameters are obtained by fitting a King profile to the star density. These parameters are used to statistically identify probable new globular cluster candidates in our sample. A detailed investigation of the projected distribution of star clusters in the Galaxy demonstrates that they show a clear tendency to cluster on spatial scales in the order of 12-25pc, a typical size for molecular clouds.

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