[HSB2012] 4196 , the SIMBAD biblio

2012AJ....143...41H - Astron. J., 143, 41 (2012/February-0)

Distance and the initial mass function of young open clusters in the η Carina Nebula: Tr 14 and Tr 16.


Abstract (from CDS):

We present new UBVIc CCD photometry of the young open clusters Trumpler 14 (Tr 14) and Trumpler 16 (Tr 16) in the η Carina Nebula. We also identify the optical counterpart of Chandra X-ray sources and Two Micron All Sky Survey point sources. The members of the clusters were selected from the proper-motion study, spectral types, reddening characteristics, and X-ray or near-IR excess emission. An abnormal reddening law R_V, cl_= 4.4±0.2 was obtained for the stars in the η Carina Nebula using the 141 early-type stars with high proper-motion membership probability (Pµ{gE} 70%). We determined the distance to each cluster and conclude that Tr 14 and Tr 16 have practically the same distance modulus of V0- MV= 12.3±0.2 mag (d = 2.9±0.3 kpc). The slope of the initial mass function was determined to be Γ = -1.3 ±0.1 for Tr 14, Γ = -1.3±0.1 for Tr 16, and Γ = -1.4±0.1 for all members in the observed region for the stars with log m{gE}0.2. We also estimated the age of the clusters to be about 1-3 Myr from the evolutionary stage of evolved stars and low-mass pre-main-sequence stars.

Abstract Copyright:

Journal keyword(s): open clusters and associations: individual (Trumpler 14, Trumpler 16) - stars: luminosity function, mass function - stars: pre-main sequence

VizieR on-line data: <Available at CDS (J/AJ/143/41): table1.dat>

Nomenclature: Table 1: [HSB2012] NNNN (Nos 1-4543).

Simbad objects: 4556

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