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Issue A&A
Volume 411, Number 2, November IV 2003
Page(s) 83 - 90
Section Stellar clusters and associations
DOI http://dx.doi.org/10.1051/0004-6361:20034009



A&A 411, 83-90 (2003)
DOI: 10.1051/0004-6361:20034009

Research Note

Discovery of new Milky Way star cluster candidates in the 2MASS Point Source Catalog. II. Physical properties of the star cluster CC 01

J. Borissova1, P. Pessev2, V. D. Ivanov3, I. Saviane4, R. Kurtev2 and G. R. Ivanov2

1  Pontificia Universidad Católica de Chile, Facultad de Física, Departamento de Astronomía y Astrofísica, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile
2  Department of Astronomy, Sofia University, Bulgaria, and Isaac Newton Institute of Chile, Bulgarian Branch, 5 James Bourchier, 1164 Sofia, Bulgaria
    e-mail: [pessev, kurtev, givanov]@phys.uni-sofia.bg
3  European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching bei Mnchen, Germany
    e-mail: vivanov@eso.org
4  European Southern Observatory, Ave. Alonso de Cordova 3107, Casilla 19, Santiago 19001, Chile
    e-mail: isaviane@eso.org



(Received 26 June 2003 / Accepted 21 August 2003 )

Abstract
Three new obscured Milky Way clusters were detected as surface density peaks in the 2MASS point source catalog during our on-going search for hidden globular clusters and massive Arches-like star clusters. One more cluster was discovered serendipitously during a visual inspection of the candidates.

The first deep J, H, and  $K_{\rm s}$ imaging of the cluster [IBP 2002] CC 01 is presented. We estimated a cluster age of ~1-3 Myr, distance modulus of $(m-M)_0 =12.56 \pm0.08$ mag ( D=3.5 kpc), and extinction of $A_V \sim 7.7$ mag. We also derived the initial mass function slope for the cluster: $\Gamma=-2.23 \pm 0.16~(\Gamma$ $\rm _{Salpeter} = -2.35$). The integration over the initial mass function yielded a total cluster mass $M_{\rm total} \leq 1800 \pm 200~M_\odot$. CC 01 appears to be a regular, not very massive star cluster, whose formation has probably been induced by the shock front from the nearby HII region Sh 2-228.


Key words: Galaxy: open clusters and associations: general -- infrared: general

Offprint request: J. Borissova, jborisso@astro.puc.cl

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© ESO 2003

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