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

被引：13

作者：

Fang, Min ^{[1
]}

Kim, Jinyoung Serena ^{[1
]}

Pascucci, Ilaria ^{[2
]}

Apai, Daniel ^{[1
,2
]}

Manara, Carlo Felice ^{[3
]}

机构：

[1] Univ Arizona, Dept Astron, 933 North Cherry Ave, Tucson, AZ 85721 USA

[2] Univ Arizona, Dept Planetary Sci, 1629 East Univ Blvd, Tucson, AZ 85721 USA

[3] European Space Res & Technol Ctr ESA ESTEC, Directorate Sci, Sci Support Off, Keplerlaan 1, NL-2201 AZ Noordwijk, Netherlands

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2016年 / 833卷 / 02期

基金：

美国国家航空航天局;

关键词：

brown dwarfs; circumstellar matter; stars: pre-main sequence; HUBBLE-SPACE-TELESCOPE; YOUNG STELLAR OBJECTS; NEBULA CLUSTER; BURNING LIMIT; BROWN DWARFS; PROTOPLANETARY DISKS; CIRCUMSTELLAR DISKS; STARS; GLOBULETTES; LUMINOSITY;

D O I：

10.3847/2041-8213/833/2/L16

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：5

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