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A CANDIDATE PLANETARY-MASS OBJECT WITH A PHOTOEVAPORATING DISK IN ORION

In this work, we report the discovery of a candidate planetary-mass object with a photoevaporating protoplanetary disk, Proplyd. 133-353, which is near the massive star theta(1) Ori C at the center of the Orion Nebula Cluster (ONC). The object was known to have extended emission pointing away from theta(1) Ori. C, indicating ongoing external photoevaporation. Our near-infrared spectroscopic data and the location on the H-R diagram suggest that the central source of Proplyd. 133-353 is substellar (similar to M9.5) and has a mass probably less than 13 Jupiter mass and an age younger than 0.5 Myr. Proplyd. 133-353 shows a similar ratio of X-ray luminosity to stellar luminosity to other young stars in the ONC with a similar stellar luminosity and has a similar proper motion to the mean one of confirmed ONC members. We propose that Proplyd. 133-353 formed in a very low-mass dusty cloud or an evaporating gas globule near theta(1) Ori C as a second generation of star formation, which can explain both its young age and the presence of its disk.

Identiferoai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/622685
Date12 December 2016
CreatorsFang, Min, Kim, Jinyoung Serena, Pascucci, Ilaria, Apai, Dániel, Manara, Carlo Felice
ContributorsUniv Arizona, Dept Astron, Univ Arizona, Dept Planetary Sci
PublisherIOP PUBLISHING LTD
Source SetsUniversity of Arizona
LanguageEnglish
Detected LanguageEnglish
TypeArticle
Rights© 2016. The American Astronomical Society. All rights reserved.
Relationhttp://stacks.iop.org/2041-8205/833/i=2/a=L16?key=crossref.afdd9ee0cbb9720296cc25b49d6b10e4

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