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Photometric Catalog for 11 Young Open Clusters in the Southern Hemisphere

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Description

This data-base presents a photometric catalog for 11 Young Open Clusters in the Southern Hemisphere [Delgado, A. J.; Alfaro, E. J.; Yun, J. L., 2011, A&A, 531, id.A141].

It provides identification for the parent clusters, as listed in the OCL catalog, and for very observed star in the respective fields. The 2MASS identity is included when cross checking with the 2MASS catalog provides an identification. Photometric indices in the UBVRcIc system are given with their respective uncertainties.

In addition, membership to the respective clusters is indicated, and a mass value is given for every candidate member. For PMS candidate members, values for temperature, luminosity and age are also listed.

All the membership estimates, and the corresponding values for the physical parameters are calculated four times, with respect to four different sets of MS+postMS and PMS models. The MS and postMS membership and mass, calculated with respect to ZAMS and Girardi et al. (2000) isochrones, are common to all four calculations. For the calculation of PMS membership and physical paremeters, four different PMS models are used, one in each of the four calculations.

Depending on the PMS model used, the membership and physical parameters determination for those stars located at the region where ZAMS and PMS isochrones merge with each other are different in some cases.

In total, we list four sets of membership assignments and physical parameters for 27040 stars in the fields of 11 Young Open clusters.

Updates are planed where we shall include other identifications of individual stars, when available or newly published.

The following table lists properties of the clusters: OCL number (Column 1). Other commonly used identification (2). Logarithm of age in yr, with respect Girardi et al. (2002) isochrones (3). Colour excess (4). Distance modulus (5):

OCL number Other commonly used identification LogAge(yr) E(B-V) DM
C0716-248 NGC 2362 6.5 0.12 10.8
C0718-218 NGC 2367 6.6 0.38 12.3
C1033-579 NGC 3293 6.8 0.29 12.0
C1041-597 Collinder 228 6.7 0.32 12.0
C1108-601 Hogg 10 7.0 0.36 11.9
C1109-601 Hogg 11 6.8 0.30 11.9
C1109-604 Trumpler 18 7.5 0.30 10.6
C1110-605 NGC 3590 7.2 0.52 11.7
C1204-609 NGC 4103 7.3 0.32 11.5
C1227-645 NGC 4463 7.3 0.39 11.1
C1424-594 NGC 5606 7.0 0.49 11.8

 

Catalog

The column contents of the catalog is:

IDENTIFICATIONS

  1. Cluster identification in the OCL catalog
  2. 2MASS identification. Lack identification indicated with '00000000-0000000'
  3. Identification in our photometry
  4. Right ascension (2000)
  5. Declination (2000)

PHOTOMETRY

  6. V magnitude
  7. error_V
  8. U-B colour index
  9. error_U-B
10. B-V colour index
11. error_B-V
12. V-Rc colour index
13. error_V-Rc
14. V-Ic colour index
15. error_V-Ic

PHYSICAL PARAMETERS

ZAMS(*), Girardi et al. (2002) isochrones, D'Antona & Mazzitelli (1997) PMS isochrones
16. Membership: 1: MS or post-MS member. 2: PMS member. 0: No assignment
17. Age in Myr
18. Mass in units of solar mass
19. Logarithm of luminosity in units of solar luminosity
20. Logarithm of effective temperature in K

ZAMS, Girardi et al. (2002) isochrones, Palla & Stahler (1999) PMS isochrones
21. Membership: 1: MS or post-MS member. 2: PMS member. 0: No assignment
22. Age in Myr
23. Mass in units of solar mass
24. Logarithm of luminosity in units of solar luminosity
25. Logarithm of effective temperature in K

ZAMS, Girardi et al. (2002) isochrones, Siess et al. (2000) PMS isochrones
26. Membership: 1: MS or post-MS member. 2: PMS member. 0: No assignment
27. Age in Myr
28. Mass in units of solar mass
29. Logarithm of luminosity in units of solar luminosity
30. Logarithm of effective temperature in K

ZAMS, Girardi et al. (2002) isochrones, Yi et al. (2001) PMS isochrones
31. Membership: 1: MS or post-MS member. 2: PMS member. 0: No assignment
32. Age in Myr
33. Mass in units of solar mass
34. Logarithm of luminosity in units of solar luminosity
35. Logarithm of effective temperature in K

 

(*) ZAMS Reference: Schmidt-Kaler, T. 1982, in Numerical Data and Functional Relationships in Science and Technology, Vol. 2b, ed. K. Schaifers & H. H. Voigt (Berlin: Springer), p. 14

 

Catalog Query

The catalog can be queried with the following selection criteria:

  • Cluster identification
  • 2MASS identification
  • Equatorial coordinates, RA Dec (2000)
  • Membership: 1 - MS and postMS, 2 - PMS candidate members+
  • Selected range in V magnitude
  • Age range in Myr
  • Mass range in Solar masses