ALMA MEASUREMENTS OF CIRCUMSTELLAR MATERIAL IN THE GQ LUP SYSTEM

ALMA MEASUREMENTS OF CIRCUMSTELLAR MATERIAL IN THE GQ LUP SYSTEM

ABSTRACT We present Atacama Large Millimeter/submillimeter Array observations of the GQ Lup system, a young Sun-like star with a substellar-mass companion in a wide-separation orbit. These observations of 870 m continuum and CO J = 3-2 line emission with beam size ∼0 3 (∼45 au) resolve the disk of d...

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Published in:The Astrophysical journal Vol. 835; no. 1; pp. 17 - 25
Main Authors: MacGregor, Meredith A., Wilner, David J., Czekala, Ian, Andrews, Sean M., Dai, Y. Sophia, Herczeg, Gregory J., Kratter, Kaitlin M., Kraus, Adam L., Ricci, Luca, Testi, Leonardo
Format: Journal Article
Language:English
Published: Philadelphia The American Astronomical Society 20-01-2017
IOP Publishing
Subjects:
Astrophysics
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
CARBON MONOXIDE
circumstellar matter
DETECTION
DISTANCE
Dust
DUSTS
EMISSION
Emission standards
FLUX DENSITY
INCLINATION
Inclination angle
MASS
ORBITS
Radio telescopes
Separation
SIMULATION
STARS
stars: individual (GQ Lup)
submillimeter: planetary systems
SUN
VELOCITY
Velocity distribution
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Abstract ABSTRACT We present Atacama Large Millimeter/submillimeter Array observations of the GQ Lup system, a young Sun-like star with a substellar-mass companion in a wide-separation orbit. These observations of 870 m continuum and CO J = 3-2 line emission with beam size ∼0 3 (∼45 au) resolve the disk of dust and gas surrounding the primary star, GQ Lup A, and provide deep limits on any circumplanetary disk surrounding the companion, GQ Lup b. The circumprimary dust disk is compact with an FWHM of 59 12 au, while the gas has a larger extent with a characteristic radius of 46.5 1.8 au. By forward-modeling the velocity field of the circumprimary disk based on the CO emission, we constrain the mass of GQ Lup A to be M* = (1.03 0.05) ∗ (d/156 pc) M , where d is a known distance, and determine that we view the disk at an inclination angle of 60 5 0 5 and a position angle of 346° 1°. The 3 upper limit on the 870 m flux density of any circumplanetary disk associated with GQ Lup b of <0.15 mJy implies an upper limit on the dust disk mass of <0.04 M⊕ for standard assumptions about optically thin emission. We discuss proposed mechanisms for the formation of wide-separation substellar companions given the non-detection of circumplanetary disks around GQ Lup b and other similar systems.
AbstractList We present Atacama Large Millimeter/submillimeter Array observations of the GQ Lup system, a young Sun-like star with a substellar-mass companion in a wide-separation orbit. These observations of 870 μm continuum and CO J = 3–2 line emission with beam size ∼0.″3 (∼45 au) resolve the disk of dust and gas surrounding the primary star, GQ Lup A, and provide deep limits on any circumplanetary disk surrounding the companion, GQ Lup b. The circumprimary dust disk is compact with an FWHM of 59 ± 12 au, while the gas has a larger extent with a characteristic radius of 46.5 ± 1.8 au. By forward-modeling the velocity field of the circumprimary disk based on the CO emission, we constrain the mass of GQ Lup A to be M* = (1.03 ± 0.05) ∗ (d/156 pc) M⊙, where d is a known distance, and determine that we view the disk at an inclination angle of 60.°5 ± 0.°5 and a position angle of 346° ± 1°. The 3σ upper limit on the 870 μm flux density of any circumplanetary disk associated with GQ Lup b of <0.15 mJy implies an upper limit on the dust disk mass of <0.04 M⊕ for standard assumptions about optically thin emission. We discuss proposed mechanisms for the formation of wide-separation substellar companions given the non-detection of circumplanetary disks around GQ Lup b and other similar systems.
We present Atacama Large Millimeter/submillimeter Array observations of the GQ Lup system, a young Sun-like star with a substellar-mass companion in a wide-separation orbit. These observations of 870 μ m continuum and CO J = 3–2 line emission with beam size ∼0.″3 (∼45 au) resolve the disk of dust and gas surrounding the primary star, GQ Lup A, and provide deep limits on any circumplanetary disk surrounding the companion, GQ Lup b. The circumprimary dust disk is compact with an FWHM of 59 ± 12 au, while the gas has a larger extent with a characteristic radius of 46.5 ± 1.8 au. By forward-modeling the velocity field of the circumprimary disk based on the CO emission, we constrain the mass of GQ Lup A to be M {sub *} = (1.03 ± 0.05) ∗ ( d /156 pc) M {sub ⊙}, where d is a known distance, and determine that we view the disk at an inclination angle of 60.°5 ± 0.°5 and a position angle of 346° ± 1°. The 3 σ upper limit on the 870 μ m flux density of any circumplanetary disk associated with GQ Lup b of <0.15 mJy implies an upper limit on the dust disk mass of <0.04 M {sub ⊕} for standard assumptions about optically thin emission. We discuss proposed mechanisms for the formation of wide-separation substellar companions given the non-detection of circumplanetary disks around GQ Lup b and other similar systems.
ABSTRACT We present Atacama Large Millimeter/submillimeter Array observations of the GQ Lup system, a young Sun-like star with a substellar-mass companion in a wide-separation orbit. These observations of 870 μ m continuum and CO J  = 3–2 line emission with beam size ∼0.″3 (∼45 au) resolve the disk of dust and gas surrounding the primary star, GQ Lup A, and provide deep limits on any circumplanetary disk surrounding the companion, GQ Lup b. The circumprimary dust disk is compact with an FWHM of 59 ± 12 au, while the gas has a larger extent with a characteristic radius of 46.5 ± 1.8 au. By forward-modeling the velocity field of the circumprimary disk based on the CO emission, we constrain the mass of GQ Lup A to be M *  = (1.03 ± 0.05) ∗ ( d /156 pc) M ⊙ , where d is a known distance, and determine that we view the disk at an inclination angle of 60.°5 ± 0.°5 and a position angle of 346° ± 1°. The 3 σ upper limit on the 870 μ m flux density of any circumplanetary disk associated with GQ Lup b of <0.15 mJy implies an upper limit on the dust disk mass of <0.04 M ⊕ for standard assumptions about optically thin emission. We discuss proposed mechanisms for the formation of wide-separation substellar companions given the non-detection of circumplanetary disks around GQ Lup b and other similar systems.
ABSTRACT We present Atacama Large Millimeter/submillimeter Array observations of the GQ Lup system, a young Sun-like star with a substellar-mass companion in a wide-separation orbit. These observations of 870 m continuum and CO J = 3-2 line emission with beam size ∼0 3 (∼45 au) resolve the disk of dust and gas surrounding the primary star, GQ Lup A, and provide deep limits on any circumplanetary disk surrounding the companion, GQ Lup b. The circumprimary dust disk is compact with an FWHM of 59 12 au, while the gas has a larger extent with a characteristic radius of 46.5 1.8 au. By forward-modeling the velocity field of the circumprimary disk based on the CO emission, we constrain the mass of GQ Lup A to be M* = (1.03 0.05) ∗ (d/156 pc) M , where d is a known distance, and determine that we view the disk at an inclination angle of 60 5 0 5 and a position angle of 346° 1°. The 3 upper limit on the 870 m flux density of any circumplanetary disk associated with GQ Lup b of <0.15 mJy implies an upper limit on the dust disk mass of <0.04 M⊕ for standard assumptions about optically thin emission. We discuss proposed mechanisms for the formation of wide-separation substellar companions given the non-detection of circumplanetary disks around GQ Lup b and other similar systems.
Author Wilner, David J.
Dai, Y. Sophia
MacGregor, Meredith A.
Kraus, Adam L.
Testi, Leonardo
Andrews, Sean M.
Herczeg, Gregory J.
Ricci, Luca
Czekala, Ian
Kratter, Kaitlin M.
Author_xml – sequence: 1
  givenname: Meredith A.
  orcidid: 0000-0001-7891-8143
  surname: MacGregor
  fullname: MacGregor, Meredith A.
  organization: Harvard-Smithsonian Center for Astrophysics , 60 Garden Street, Cambridge, MA 02138, USA
– sequence: 2
  givenname: David J.
  orcidid: 0000-0003-1526-7587
  surname: Wilner
  fullname: Wilner, David J.
  organization: Harvard-Smithsonian Center for Astrophysics , 60 Garden Street, Cambridge, MA 02138, USA
– sequence: 3
  givenname: Ian
  orcidid: 0000-0002-1483-8811
  surname: Czekala
  fullname: Czekala, Ian
  organization: Stanford University Kavli Institute for Particle Astrophysics and Cosmology (KIPAC), Stanford, CA 94305, USA
– sequence: 4
  givenname: Sean M.
  orcidid: 0000-0003-2253-2270
  surname: Andrews
  fullname: Andrews, Sean M.
  organization: Harvard-Smithsonian Center for Astrophysics , 60 Garden Street, Cambridge, MA 02138, USA
– sequence: 5
  givenname: Y. Sophia
  surname: Dai
  fullname: Dai, Y. Sophia
  organization: Caltech/IPAC, 1200 E. California Boulevard, Pasadena, CA, 91125, USA
– sequence: 6
  givenname: Gregory J.
  orcidid: 0000-0002-7154-6065
  surname: Herczeg
  fullname: Herczeg, Gregory J.
  organization: Peking University Kavli Institute for Astronomy and Astrophysics, Yi He Yuan Lu 5, Haidian Qu, 100871 Beijing, China
– sequence: 7
  givenname: Kaitlin M.
  orcidid: 0000-0001-5253-1338
  surname: Kratter
  fullname: Kratter, Kaitlin M.
  organization: Department of Astronomy, University of Arizona , Tucson, AZ 85721, USA
– sequence: 8
  givenname: Adam L.
  orcidid: 0000-0001-9811-568X
  surname: Kraus
  fullname: Kraus, Adam L.
  organization: Department of Astronomy, The University of Texas at Austin , Austin, TX 78712, USA
– sequence: 9
  givenname: Luca
  surname: Ricci
  fullname: Ricci, Luca
  organization: Harvard-Smithsonian Center for Astrophysics , 60 Garden Street, Cambridge, MA 02138, USA
– sequence: 10
  givenname: Leonardo
  orcidid: 0000-0003-1859-3070
  surname: Testi
  fullname: Testi, Leonardo
  organization: European Southern Observatory (ESO) Headquarters , Karl-Schwarzschild-Str. 2, D-85748 Garching bei Muenchen, Germany
BackLink https://www.osti.gov/biblio/22664008$$D View this record in Osti.gov
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Snippet ABSTRACT We present Atacama Large Millimeter/submillimeter Array observations of the GQ Lup system, a young Sun-like star with a substellar-mass companion in a...
ABSTRACT We present Atacama Large Millimeter/submillimeter Array observations of the GQ Lup system, a young Sun-like star with a substellar-mass companion in a...
We present Atacama Large Millimeter/submillimeter Array observations of the GQ Lup system, a young Sun-like star with a substellar-mass companion in a...
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SubjectTerms Astrophysics
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
CARBON MONOXIDE
circumstellar matter
DETECTION
DISTANCE
Dust
DUSTS
EMISSION
Emission standards
FLUX DENSITY
INCLINATION
Inclination angle
MASS
ORBITS
Radio telescopes
Separation
SIMULATION
STARS
stars: individual (GQ Lup)
submillimeter: planetary systems
SUN
VELOCITY
Velocity distribution
Title ALMA MEASUREMENTS OF CIRCUMSTELLAR MATERIAL IN THE GQ LUP SYSTEM
URI https://iopscience.iop.org/article/10.3847/1538-4357/835/1/17
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https://www.osti.gov/biblio/22664008
Volume 835
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