SIMBAD references

2002AJ....124.1001C - Astron. J., 124, 1001-1025 (2002/August-0)

Near-infrared photometric variability of stars toward the Chamaeleon I molecular cloud.


Abstract (from CDS):

We present the results of a J, H, and Ks photometric monitoring campaign of a 0°.72x6° area centered on the Chamaeleon I star-forming region. Data were obtained on 15 separate nights over a 4 month time interval using the Two Micron All Sky Survey south telescope. Out of a total of 34,539 sources brighter than the photometric completeness limits (J=16.0, H=15.2, and Ks=14.8), 95 exhibit near-infrared variability in one or more bands. The variables can be grouped into a population of bright, red objects that are associated with the Chamaeleon I association and a population of faint, blue variables that are dispersed over the full 6° of the survey and are likely field stars or older pre-main-sequence stars unrelated to the present-day Chamaeleon I molecular cloud. Ten new candidate members of Chamaeleon I, including eight brown dwarf candidates, have been identified based on variability and/or near-infrared-excess emission in the J-H versus H-Ks color-color diagram. We also provide a compendium of astrometry and J, H, and Ks photometry for previously identified members and candidate members of Chamaeleon I.

Abstract Copyright:

Journal keyword(s): Infrared Radiation - Galaxy: Open Clusters and Associations: General - Stars: Pre-Main-Sequence - Stars: Variables: General

VizieR on-line data: <Available at CDS (J/AJ/124/1001): table3.dat table4.dat table5.dat table6.dat>

Nomenclature: Tables 3, 4, 6: CHSM NNNNN N = 95+5+ among 34354.

Simbad objects: 259

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