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ALMA Observations of the Orion Proplyds

Mann, Rita K. and Di Francesco, James and Johnstone, Doug and Andrews, Sean M. and Williams, Jonathan P. and Bally, John and Ricci, Luca and Hughes, A. Meredith and Matthews, Brenda C. (2014) ALMA Observations of the Orion Proplyds. Astrophysical Journal, 784 (1). Art. No. 82. ISSN 0004-637X. doi:10.1088/0004-637X/784/1/82.

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We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of protoplanetary disks ("proplyds") in the Orion Nebula Cluster. We imaged five individual fields at 856 μm containing 22 Hubble Space Telescope (HST)-identified proplyds and detected 21 of them. Eight of those disks were detected for the first time at submillimeter wavelengths, including the most prominent, well-known proplyd in the entire Orion Nebula, 114-426. Thermal dust emission in excess of any free-free component was measured in all but one of the detected disks, and ranged between 1 and 163 mJy, with resulting disk masses of 0.3-79 M_(jup). An additional 26 stars with no prior evidence of associated disks in HST observations were also imaged within the 5 fields, but only 2 were detected. The disk mass upper limits for the undetected targets, which include OB stars, θ^1 Ori C, and θ^1 Ori F, range from 0.1 to 0.6 M_(jup). Combining these ALMA data with previous Submillimeter Array observations, we find a lack of massive (≳3 M_(jup)) disks in the extreme-UV-dominated region of Orion, within 0.03 pc of θ^1 Ori C. At larger separations from θ^1 Ori C, in the far-UV-dominated region, there is a wide range of disk masses, similar to what is found in low-mass star forming regions. Taken together, these results suggest that a rapid dissipation of disk masses likely inhibits potential planet formation in the extreme-UV-dominated regions of OB associations, but leaves disks in the far-UV-dominated regions relatively unaffected.

Item Type:Article
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URLURL TypeDescription
Johnstone, Doug0000-0002-6773-459X
Andrews, Sean M.0000-0003-2253-2270
Williams, Jonathan P.0000-0001-5058-695X
Bally, John0000-0001-8135-6612
Additional Information:© 2014 American Astronomical Society. Received 2013 October 31; accepted 2014 February 11; published 2014 March 6. This paper makes use of the following ALMA data: ADS/ JAO.ALMA#2011.0.00028.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
Subject Keywords:protoplanetary disks; submillimeter: planetary systems
Issue or Number:1
Record Number:CaltechAUTHORS:20140606-100036190
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Official Citation:ALMA Observations of the Orion Proplyds Rita K. Mann et al. 2014 ApJ 784 82
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46119
Deposited By: Ruth Sustaita
Deposited On:06 Jun 2014 17:16
Last Modified:10 Nov 2021 17:21

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