Deep Near-Infrared Observations and Identifications of Chandra Sources in the Orion Molecular Cloud 2 and 3

Abstract

We conducted deep NIR imaging observations of the Orion molecular cloud 2 and 3 using QUIRC on the 88-inch telescope of the University of Hawaii. Our purposes are 1) to generate a comprehensive NIR source catalog of these star forming clouds, and 2) to identify the NIR counterpart of the Chandra X-ray sources that have no counterpart in the 2MASS catalog. Our J-, H-, and K-band observations are about 2 mag deeper than those of 2MASS, and well match the current Chandra observation. We detected 1448 NIR sources, for which we derived the position, the J-, H-, and K-band magnitude, and the 2MASS counterpart. Using this catalog, we identified the NIR counterpart for about 42% of the 2MASS-unIDed Chandra sources. The nature of these Chandra sources are discussed using their NIR colors and spatial distributions, and a dozen protostar and brown dwarf candidates are identified.

arXiv comment39 pages, 9 postscript figures, accepted for publication in AJ

References in corpus (10)

• Color Transformations for the 2MASS Second Incremental Data Release
• First Results from the X-ray and Optical Survey of the Chandra Deep Field South
• Resolving the extragalactic hard X-ray background
• 2MASS Observations of the Perseus, Orion A, Orion B, and Monoceros R2 Molecular Clouds
• Near-Infrared Photometric Variability of Stars Toward the Orion A Molecular Cloud
• Constraints on the Stellar/Sub-stellar Mass Function in the Inner Orion Nebula Cluster
• X-ray emitting young stars in the Orion Nebula
• Modeling the Near-Infrared Luminosity Functions of Young Stellar Clusters
• Discovery of X rays from Class 0 protostar candidates in OMC-3
• X-ray Properties of Young Stellar Objects in OMC-2 and OMC-3 from the Chandra X-ray Observatory

Cited by in corpus (12)

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• Transitional disks and their origins: an infrared spectroscopic survey of Orion A
• N2H+ and HC3N Observations of the Orion A Cloud
• Infrared Nebulae Around Young Stellar Objects
• Determining the recurrence timescale of long-lasting YSO outbursts
• Discovery of Extremely Embedded X-ray Sources in the R Coronae Australis Star Forming Core
• The Gould's Belt Very Large Array Survey III. The Orion region
• Star Formation Under the Outflow: The Discovery of a Non-Thermal Jet from OMC-2 FIR 3 and its Relationship to the Deeply Embedded FIR 4 Protostar
• A High-Resolution Very Large Array Observation of a Protostar in OMC-3: Shock-induced X-ray Emission by a Protostellar Jet
• Gas velocity structure of the Orion A Integral Shaped Filament
• On the nature of the deeply embedded protostar OMC-2 FIR 4
• The JCMT Transient Survey: An Extraordinary Submillimetre Flare in the T Tauri Binary System JW 566