A SUBMILLIMETER ARRAY SURVEY OF PROTOPLANETARY DISKS IN THE ORION NEBULA CLUSTER
- National Research Council Canada, Herzberg Institute of Astrophysics, 5071 West Saanich Road, Victoria, British Columbia, V9E 2E7 (Canada)
We present the full results of our three-year-long Submillimeter Array (SMA) survey of protoplanetary disks in the Orion Nebula Cluster. We imaged 23 fields at 880 {mu}m and 2 fields at 1330 {mu}m, covering an area of {approx}6.5 arcmin{sup 2} and containing 67 disks. We detected 42 disks with fluxes between 6 and 135 mJy and at rms noise levels between 0.6 and 5.3 mJy beam{sup -1}. Thermal dust emission above any free-free component was measured in 40 of the 42 detections, and the inferred disk masses range from 0.003 to 0.07 M{sub sun}. We find that disks located within 0.3 pc of {theta}{sup 1} Ori C have a truncated mass distribution, while disks located beyond 0.3 pc have masses more comparable to those found in low-mass star-forming regions. The disk mass distribution in Orion has a distance dependence, with a derived relationship max(M{sub disk}) = 0.046 M{sub sun}(d/0.3 pc){sup 0.33} for the maximum disk masses. We found evidence of grain growth in disk 197-427, the only disk detected at both 880 {mu}m and 1330 {mu}m with the SMA. Despite the rapid erosion of the outer parts of the Orion disks by photoevaporation, the potential for planet formation remains high in this massive star-forming region, with {approx}18% of the surveyed disks having masses {>=}0.01 M{sub sun} within 60 AU.
- OSTI ID:
- 21474438
- Journal Information:
- Astrophysical Journal, Vol. 725, Issue 1; Other Information: DOI: 10.1088/0004-637X/725/1/430; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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