Cl* NGC 6530 SCB 1015 , the SIMBAD biblio

2000AJ....120..333S - Astron. J., 120, 333-348 (2000/July-0)

UBVRI and Hα photometry of the young open cluster NGC 6530.

SUNG H., CHUN M.-Y. and BESSELL M.S.

Abstract (from CDS):

New UBVRI and Hα photometry has been obtained for the young open cluster NGC 6530 located 10' east of the Lagoon Nebula (M8). We found 37 pre-main-sequence (PMS) stars with Hα emission and nine PMS candidates using the R-Hα color, a measure of Hα emission. From this new photometry we derived the cluster parameters (V0-MV=11.25±0.1 mag and <E(B-V)≥0.35 mag), typical age (1.5 Myr), and an age spread of about 5 Myr. We confirmed the presence of a small amount of differential reddening across the cluster. We also verified the abnormal reddening law for the cluster, especially for a heavily embedded O7 V star, Herschel 36. Comparisons were made for several PMS evolution models with regard to the resulting age distribution and the initial mass function.

Abstract Copyright:

Journal keyword(s): Stars: Color-Magnitude Diagrams - Galaxy: Open Clusters and Associations: Individual: NGC Number: NGC 6530 - Stars: Early-Type - Stars: Pre-Main-Sequence

VizieR on-line data: <Available at CDS (J/AJ/120/333): table1.dat table3.dat table4.dat table5.dat>

Nomenclature: Table 1: Cl* NGC 6530 SCB NNNN N=929 among (Nos 1-1042).

Simbad objects: 929

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