First Millimeter Detection of the Disk around a Young, Isolated, Planetary-mass Object

被引：23

作者：

Bayo, Amelia ^{[1
]}

Joergens, Viki ^{[2
]}

Liu, Yao ^{[2
,3
,4
]}

Brauer, Robert ^{[5
]}

Olofsson, Johan ^{[1
,2
]}

Arancibia, Javier ^{[1
]}

Pinilla, Paola ^{[6
]}

Wolf, Sebastian ^{[5
]}

Ruge, Jan Philipp ^{[5
]}

Henning, Thomas ^{[2
]}

Natta, Antonella ^{[7
,8
]}

Johnston, Katharine G. ^{[9
]}

Bonnefoy, Mickael ^{[10
]}

Beuther, Henrik ^{[2
]}

Chauvin, Gael ^{[10
,11
,12
]}

机构：

[1] Univ Valparaiso, Inst Fis & Astron, Fac Ciencias, Ave Gran Bretana 1111, Valparaiso, Chile

[2] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[3] Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China

[4] Chinese Acad Sci, Key Lab Radio Astron, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China

[5] Univ Kiel, Inst Theoret Phys & Astrophys, Leibnizstr 15, D-24118 Kiel, Germany

[6] Univ Arizona, Dept Astron, Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA

[7] Dublin Inst Adv Studies, Sch Cosm Phys, 31 Fitzwilliams Pl, Dublin 2, Ireland

[8] INAF Osservatorio Astrofis Arcetri, Lgo E Fermi 5, I-50125 Florence, Italy

[9] Univ Leeds, Sch Phys & Astron, EC Stoner Bldg, Leeds LS2 9JT, W Yorkshire, England

[10] Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France

[11] Univ Chile, CNRS INSU UMI 3386, Unidad Mixta Int Francochilena Astron, Casilla 36-D, Santiago, Chile

[12] Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2017年 / 841卷 / 01期

基金：

欧盟地平线“2020”; 爱尔兰科学基金会;

关键词：

brown dwarfs; stars: formation; stars: low-mass; stars: pre-main sequence; BROWN DWARF DISKS; STAR-FORMING REGION; CHAMELEON-I; PRESTELLAR CORES; HERSCHEL SURVEY; RHO OPHIUCHI; CLOUD CORE; COLD DUST; FRAGMENTATION; EMISSION;

D O I：

10.3847/2041-8213/aa7046

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

OTS44 is one of only four free-floating planets known to have a disk. We have previously shown that it is the coolest and least massive known free-floating planet (similar to 12 M-Jup) with a substantial disk that is actively accreting. We have obtained Band 6 (233 GHz) ALMA continuum data of this very young disk-bearing object. The data show a clear unresolved detection of the source. We obtained disk-mass estimates via empirical correlations derived for young, higher-mass, central (substellar) objects. The range of values obtained are between 0.07 and 0.63 M-circle plus (dust masses). We compare the properties of this unique disk with those recently reported around higher-mass (brown dwarfs) young objects in order to infer constraints on its mechanism of formation. While extreme assumptions on dust temperature yield disk-mass values that could slightly diverge from the general trends found for more massive brown dwarfs, a range of sensible values provide disk masses compatible with a unique scaling relation between M-dust and M* through the substellar domain down to planetary masses.

引用

页数：4

共 43 条

[1] Herschel survey of brown dwarf disks in ρ Ophiuchi [J].

Alves de Oliveira, C. ;

Abraham, P. ;

Marton, G. ;

Pinte, C. ;

Kiss, Cs ;

Kun, M. ;

Kospal, A. ;

Andre, P. ;

Koenyves, V. .

ASTRONOMY & ASTROPHYSICS, 2013, 559

[2] THE MASS DEPENDENCE BETWEEN PROTOPLANETARY DISKS AND THEIR STELLAR HOSTS [J].

Andrews, Sean M. ;

Rosenfeld, Katherine A. ;

Kraus, Adam L. ;

Wilner, David J. .

ASTROPHYSICAL JOURNAL, 2013, 771 (02)

[3] The onset of planet formation on brown dwarf disks [J].

Apai, D ;

Pascucci, I ;

Bouwman, J ;

Natta, A ;

Henning, T ;

Dullemond, CP .

SCIENCE, 2005, 310 (5749) :834-836

[4]

Barrado, 2007, APJ, V664, P481

[5] Physical parameters of late M-type members of Chamaeleon I and TW Hydrae Association: dust settling, age dispersion and activity [J].

Bayo, A. ;

Barrado, D. ;

Allard, F. ;

Henning, T. ;

Comeron, F. ;

Morales-Calderon, M. ;

Rajpurohit, A. S. ;

Pena Ramirez, K. ;

Beamin, J. C. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2017, 465 (01) :760-783

[6] Spectroscopy of very low-mass stars and brown dwarfs in the Lambda Orionis star-forming region II. Rotation, activity and other properties of spectroscopically confirmed members of Collinder 69 [J].

Bayo, A. ;

Barrado, D. ;

Huelamo, N. ;

Morales-Calderon, M. ;

Melo, C. ;

Stauffer, J. ;

Stelzer, B. .

ASTRONOMY & ASTROPHYSICS, 2012, 547

[7] A library of near-infrared integral field spectra of young M-L dwarfs [J].

Bonnefoy, M. ;

Chauvin, G. ;

Lagrange, A. -M. ;

Rojo, P. ;

Allard, F. ;

Pinte, C. ;

Dumas, C. ;

Homeier, D. .

ASTRONOMY & ASTROPHYSICS, 2014, 562

[8] Brown dwarf disks with Herschel: Linking far-infrared and (sub)-mm fluxes [J].

Daemgen, Sebastian ;

Natta, Antonella ;

Scholz, Alexander ;

Testi, Leonardo ;

Jayawardhana, Ray ;

Greaves, Jane ;

Eastwood, Daniel .

ASTRONOMY & ASTROPHYSICS, 2016, 594

[9] ON RADIATION PRESSURE IN STATIC, DUSTY H II REGIONS [J].

Draine, B. T. .

ASTROPHYSICAL JOURNAL, 2011, 732 (02)

[10] A CANDIDATE PLANETARY-MASS OBJECT WITH A PHOTOEVAPORATING DISK IN ORION [J].

Fang, Min ;

Kim, Jinyoung Serena ;

Pascucci, Ilaria ;

Apai, Daniel ;

Manara, Carlo Felice .

ASTROPHYSICAL JOURNAL LETTERS, 2016, 833 (02)

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