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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 559423.0, MPI für Astronomie / Publikationen_mpia
A Wide-Field Survey of the Orion Nebula Cluster in the near-infrared
Authors:Robberto, M.; Soderblom, D. R.; Scandariato, G.; Smith, K.; Da Rio, N.; Pagano, I.; Spezzi, L.
Date of Publication (YYYY-MM-DD):2010
Title of Journal:The Astronomical Journal
Journal Abbrev.:AJ
Issue / Number:3
Start Page:950
End Page:968
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We present J, H, and K S photometry of the Orion Nebula Cluster (ONC) obtained at the CTIO/Blanco 4 m telescope at Cerro Tololo with the Infrared Side Port Imager camera. From the observations we have assembled a catalog of about ~7800 sources distributed over an area of approximately 30' × 40', the largest of any survey deeper than the Two Micron All Sky Survey (2MASS) in this region. The catalog provides absolute coordinates accurate to about 0.15 arcsec and 3σ photometry in the 2MASS system down to \\sl J\simeq 19.5 mag, \\sl H\simeq 18.0 mag, \\sl K{_S}\ \simeq 18.5 mag, enough to detect planetary size objects 1 Myr old under AV ~= 10 mag of extinction at the distance of the Orion Nebula. We present a preliminary analysis of the catalog, done by comparing the (J-H, H-K S ) color-color diagram, the (H, J-H) and (K S , H-K S ) color-magnitude diagrams, and the J H K S luminosity functions (LFs) of three regions at an increasing projected distance from the Trapezium. Sources in the inner region typically show
Free Keywords:open clusters and associations: individual: Orion Nebula Cluster; stars: luminosity function; mass function; stars: pre-main sequence
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2010AJ....139..950R [ID No:1]
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