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arXiv · 1611.09761

A candidate planetary-mass object with a photoevaporating disk in Orion

Min Fang·Jinyoung Serena Kim·Ilaria Pascucci·Dániel Apai·Carlo Felice Manara
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Abstract

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 suggests that the central source of Proplyd 133-353 is substellar ($\sim$M9.5), might have 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 was formed in a very low-mass dusty cloud 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.

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Min Fang, Jinyoung Serena Kim, Ilaria Pascucci, Dániel Apai, Carlo Felice Manara. 2016-11-29. A candidate planetary-mass object with a photoevaporating disk in Orion. https://doi.org/10.3847/2041-8213%2F833%2F2%2Fl16

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