Stellar population in Chamaeleon I : J/ApJS/173/104


Authors : Luhman K.L. orcid (hide) et..al

Bibcode : 2007ApJS..173..104L (ADS) (Simbad) (Objects) (hide)

CDS Keywords : Effective temperatures; Photometry, RI; Extinction; Photometry, infrared; Stars, pre-main sequence; YSOs
UAT : Effective temperature, Infrared photometry, Optical astronomy, Photometry, Extinction, Infrared photometry, Pre-main sequence stars, Young stellar objects

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Inserted into VizieR : 15-Jun-2009
Last modification : 11-Jul-2017

The stellar population of the Chamaeleon I star-forming region. (2007)

Keywords : infrared stars - stars: evolution - stars: formation stars: low-mass, brown dwarfs - stars: pre-main sequence stars: luminosity function, mass function

Abstract:I present a new census of the stellar population in the ChamaeleonI star-forming region. Using optical and near-IR photometry and follow-up spectroscopy, I have discovered 50 new members of ChamaeleonI, expanding the census of known members to 226 objects. Fourteen of these new members have spectral types later than M6, which doubles the number of known members that are likely to be substellar. I have estimated extinctions, luminosities, and effective temperatures for the known members, used these data to construct an H-R diagram for the cluster, and inferred individual masses and ages with the theoretical evolutionary models of Baraffe and Chabrier. The low-mass stars are more widely distributed than members at other masses in the ...(more)
Abstract: (hide)
Optical and near-IR broadband photometry from several sources (2MASS and DENIS for IK1 & IK2) were used to perform four surveys (IK1, RI, IK2, IZ). For RI, on the night of 2004 January 11, R- and I-band images obtained with the Inamori Magellan Areal Camera and Spectrograph (IMACS) on the Magellan I telescope at Las Campanas Observatory were used. Deep optical and near-IR images of the densest portion of the southern subcluster that were obtained by Luhman et al. (2005ApJ...635L..93L,) collected with the Advanced Camera for Surveys (ACS) aboard HST through the F775W and F850LP filters were used for IZ.

  • J/A+A/416/555 : Brown Dwarfs in ChaI Dark Cloud (Lopez-Marti+ 2004)
  • J/AJ/124/1001 : JHKs photometry of Cha I variables (Carpenter, 2002)
  • J/AJ/121/974 : JHK photometry in Cha I (Gomez+, 2001)

                
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