A Near-Infrared Imaging Survey of the Chamaeleon I Dark Cloud | Zendy

M. Gómez | Zendy; Scott J. Kenyon | Zendy

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A Near-Infrared Imaging Survey of the Chamaeleon I Dark Cloud

Author(s) -

M. Gómez,

Scott J. Kenyon

Publication year - 2001

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/318776

Subject(s) - physics , stars , astrophysics , infrared , extinction (optical mineralogy) , cloud computing , astronomy , brown dwarf , optics , computer science , operating system

We describe a near-infrared imaging survey covering approximately 1 squaredeg of the Chamaeleon I dark cloud. The survey is complete for K < 15.0, H <16.0, and J < 16.5, roughly two magnitudes more sensitive than previous largescale surveys. We use the large number of background stars detected to derivean accurate near-infrared extinction law for the cloud and select new candidatemembers with near-infrared color excesses. We list about 100 candidates of thecloud with K > 12.0, based on their positions in the J-H, H-K color-colordiagram. These new stars have low luminosities (K > 12 -- 16, H-K > 0.5 -- 1.5)and may have masses close to or even below the hydrogen burning limit.Comment: 33 pages (including tables), 8 figure

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