ALMA Observations of the Young Substellar Binary System 2M1207

L. Ricci; P. Cazzoletti; I. Czekala; S. M. Andrews; D. Wilner; L. Szcs; G. Lodato; L. Testi; I. Pascucci; S. Mohanty; D. Apai; J. M. Carpenter; B. P. Bowler

doi:10.3847/1538-3881/aa78a0

ALMA Observations of the Young Substellar Binary System 2M1207

L. Ricci, P. Cazzoletti, I. Czekala, S. M. Andrews, D. Wilner, L. Szcs, G. Lodato, L. Testi, I. Pascucci, S. Mohanty, D. Apai, J. M. Carpenter, B. P. Bowler

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23 Scopus citations

Abstract

We present ALMA observations of the 2M1207 system, a young binary made of a brown dwarf with a planetarymass companion at a projected separation of about 40 au. We detect emission from dust continuum at 0.89 mm and from the J = 3-2 rotational transition of CO from a very compact disk around the young brown dwarf. The small radius found for this brown dwarf disk may be due to truncation from the tidal interaction with the planetarymass companion. Under the assumption of optically thin dust emission, we estimate a dust mass of 0.1M_⊕ for the 2M1207A disk and a 3σ upper limit of ∼1MMoon for dust surrounding 2M1207b, which is the tightest upper limit obtained so far for the mass of dust particles surrounding a young planetary-mass companion. We discuss the impact of this and other non-detections of young planetary-mass companions for models of planet formation that predict circumplanetary material to surround these objects.

Original language	English (US)
Article number	24
Journal	Astronomical Journal
Volume	154
Issue number	1
DOIs	https://doi.org/10.3847/1538-3881/aa78a0
State	Published - Jul 2017

Keywords

circumstellar matter
planets and satellites: formation
stars: individual (2M1207)
submillimeter: stars

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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title = "ALMA Observations of the Young Substellar Binary System 2M1207",

abstract = "We present ALMA observations of the 2M1207 system, a young binary made of a brown dwarf with a planetarymass companion at a projected separation of about 40 au. We detect emission from dust continuum at 0.89 mm and from the J = 3-2 rotational transition of CO from a very compact disk around the young brown dwarf. The small radius found for this brown dwarf disk may be due to truncation from the tidal interaction with the planetarymass companion. Under the assumption of optically thin dust emission, we estimate a dust mass of 0.1M⊕ for the 2M1207A disk and a 3σ upper limit of ∼1MMoon for dust surrounding 2M1207b, which is the tightest upper limit obtained so far for the mass of dust particles surrounding a young planetary-mass companion. We discuss the impact of this and other non-detections of young planetary-mass companions for models of planet formation that predict circumplanetary material to surround these objects.",

keywords = "circumstellar matter, planets and satellites: formation, stars: individual (2M1207), submillimeter: stars",

author = "L. Ricci and P. Cazzoletti and I. Czekala and Andrews, {S. M.} and D. Wilner and L. Szcs and G. Lodato and L. Testi and I. Pascucci and S. Mohanty and D. Apai and Carpenter, {J. M.} and Bowler, {B. P.}",

year = "2017",

month = jul,

doi = "10.3847/1538-3881/aa78a0",

language = "English (US)",

volume = "154",

journal = "Astronomical Journal",

issn = "0004-6256",

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T1 - ALMA Observations of the Young Substellar Binary System 2M1207

AU - Ricci, L.

AU - Cazzoletti, P.

AU - Czekala, I.

AU - Andrews, S. M.

AU - Wilner, D.

AU - Szcs, L.

AU - Lodato, G.

AU - Testi, L.

AU - Pascucci, I.

AU - Mohanty, S.

AU - Apai, D.

AU - Carpenter, J. M.

AU - Bowler, B. P.

PY - 2017/7

Y1 - 2017/7

N2 - We present ALMA observations of the 2M1207 system, a young binary made of a brown dwarf with a planetarymass companion at a projected separation of about 40 au. We detect emission from dust continuum at 0.89 mm and from the J = 3-2 rotational transition of CO from a very compact disk around the young brown dwarf. The small radius found for this brown dwarf disk may be due to truncation from the tidal interaction with the planetarymass companion. Under the assumption of optically thin dust emission, we estimate a dust mass of 0.1M⊕ for the 2M1207A disk and a 3σ upper limit of ∼1MMoon for dust surrounding 2M1207b, which is the tightest upper limit obtained so far for the mass of dust particles surrounding a young planetary-mass companion. We discuss the impact of this and other non-detections of young planetary-mass companions for models of planet formation that predict circumplanetary material to surround these objects.

AB - We present ALMA observations of the 2M1207 system, a young binary made of a brown dwarf with a planetarymass companion at a projected separation of about 40 au. We detect emission from dust continuum at 0.89 mm and from the J = 3-2 rotational transition of CO from a very compact disk around the young brown dwarf. The small radius found for this brown dwarf disk may be due to truncation from the tidal interaction with the planetarymass companion. Under the assumption of optically thin dust emission, we estimate a dust mass of 0.1M⊕ for the 2M1207A disk and a 3σ upper limit of ∼1MMoon for dust surrounding 2M1207b, which is the tightest upper limit obtained so far for the mass of dust particles surrounding a young planetary-mass companion. We discuss the impact of this and other non-detections of young planetary-mass companions for models of planet formation that predict circumplanetary material to surround these objects.

KW - circumstellar matter

KW - planets and satellites: formation

KW - stars: individual (2M1207)

KW - submillimeter: stars

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JO - Astronomical Journal

JF - Astronomical Journal

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ER -

ALMA Observations of the Young Substellar Binary System 2M1207

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Keywords

ASJC Scopus subject areas

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