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The Gliese 86 Binary System: A Warm Jupiter Formed in a Disk Truncated at $\approx$2 AU

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The Gliese 86 Binary System : A Warm Jupiter Formed in a Disk Truncated at $\approx$2 AU. / Zeng, Yunlin; Brandt, Timothy D.; Li, Gongjie; Dupuy, Trent J.; Li, Yiting; Brandt, G. Mirek; Farihi, Jay; Horner, Jonathan; Wittenmyer, Robert A.; Butler, R. Paul; Tinney, Christopher G.; Carter, Bradley D.; Wright, Duncan J.; Jones, Hugh R. A.; O'Toole, Simon J.

In: The Astronomical Journal , 13.12.2021.

Research output: Contribution to journalArticlepeer-review

Harvard

Zeng, Y, Brandt, TD, Li, G, Dupuy, TJ, Li, Y, Brandt, GM, Farihi, J, Horner, J, Wittenmyer, RA, Butler, RP, Tinney, CG, Carter, BD, Wright, DJ, Jones, HRA & O'Toole, SJ 2021, 'The Gliese 86 Binary System: A Warm Jupiter Formed in a Disk Truncated at $\approx$2 AU', The Astronomical Journal .

APA

Zeng, Y., Brandt, T. D., Li, G., Dupuy, T. J., Li, Y., Brandt, G. M., Farihi, J., Horner, J., Wittenmyer, R. A., Butler, R. P., Tinney, C. G., Carter, B. D., Wright, D. J., Jones, H. R. A., & O'Toole, S. J. (2021). The Gliese 86 Binary System: A Warm Jupiter Formed in a Disk Truncated at $\approx$2 AU. Manuscript submitted for publication.

Vancouver

Author

Zeng, Yunlin ; Brandt, Timothy D. ; Li, Gongjie ; Dupuy, Trent J. ; Li, Yiting ; Brandt, G. Mirek ; Farihi, Jay ; Horner, Jonathan ; Wittenmyer, Robert A. ; Butler, R. Paul ; Tinney, Christopher G. ; Carter, Bradley D. ; Wright, Duncan J. ; Jones, Hugh R. A. ; O'Toole, Simon J. / The Gliese 86 Binary System : A Warm Jupiter Formed in a Disk Truncated at $\approx$2 AU. In: The Astronomical Journal . 2021.

Bibtex

@article{7bd50b198f344d3da11f410544ebd0c0,
title = "The Gliese 86 Binary System: A Warm Jupiter Formed in a Disk Truncated at $\approx$2 AU",
abstract = " Gliese 86 is a nearby K dwarf hosting a giant planet on a $\approx$16-day orbit and an outer white dwarf companion on a $\approx$century-long orbit. In this study we combine radial velocity data (including new measurements spanning more than a decade) with high angular resolution imaging and absolute astrometry from Hipparcos and Gaia to measure the current orbits and masses of both companions. We then simulate the evolution of the Gl 86 system to constrain its primordial orbit when both stars were on the main sequence; the closest approach between the two stars was then about $9\,$AU. Such a close separation limited the size of the protoplanetary disk of Gl 86 A and dynamically hindered the formation of the giant planet around it. Our measurements of Gl 86 B and Gl 86 Ab's orbits reveal Gl 86 as a system in which giant planet formation took place in a disk truncated at $\approx$2$\,$AU. Such a disk would be just big enough to harbor the dust mass and total mass needed to assemble Gl 86 Ab's core and envelope, assuming a high disk accretion rate and a low viscosity. Inefficient accretion of the disk onto Gl 86 Ab, however, would require a disk massive enough to approach the Toomre stability limit at its outer truncation radius. The orbital architecture of the Gl 86 system shows that giant planets can form even in severely truncated disks and provides an important benchmark for planet formation theory. ",
keywords = "astro-ph.EP, astro-ph.SR",
author = "Yunlin Zeng and Brandt, {Timothy D.} and Gongjie Li and Dupuy, {Trent J.} and Yiting Li and Brandt, {G. Mirek} and Jay Farihi and Jonathan Horner and Wittenmyer, {Robert A.} and Butler, {R. Paul} and Tinney, {Christopher G.} and Carter, {Bradley D.} and Wright, {Duncan J.} and Jones, {Hugh R. A.} and O'Toole, {Simon J.}",
note = "17 pages, 10 figures",
year = "2021",
month = dec,
day = "13",
language = "English",
journal = "The Astronomical Journal ",
issn = "0004-6256",
publisher = "IOP Publishing Ltd.",

}

RIS

TY - JOUR

T1 - The Gliese 86 Binary System

T2 - A Warm Jupiter Formed in a Disk Truncated at $\approx$2 AU

AU - Zeng, Yunlin

AU - Brandt, Timothy D.

AU - Li, Gongjie

AU - Dupuy, Trent J.

AU - Li, Yiting

AU - Brandt, G. Mirek

AU - Farihi, Jay

AU - Horner, Jonathan

AU - Wittenmyer, Robert A.

AU - Butler, R. Paul

AU - Tinney, Christopher G.

AU - Carter, Bradley D.

AU - Wright, Duncan J.

AU - Jones, Hugh R. A.

AU - O'Toole, Simon J.

N1 - 17 pages, 10 figures

PY - 2021/12/13

Y1 - 2021/12/13

N2 - Gliese 86 is a nearby K dwarf hosting a giant planet on a $\approx$16-day orbit and an outer white dwarf companion on a $\approx$century-long orbit. In this study we combine radial velocity data (including new measurements spanning more than a decade) with high angular resolution imaging and absolute astrometry from Hipparcos and Gaia to measure the current orbits and masses of both companions. We then simulate the evolution of the Gl 86 system to constrain its primordial orbit when both stars were on the main sequence; the closest approach between the two stars was then about $9\,$AU. Such a close separation limited the size of the protoplanetary disk of Gl 86 A and dynamically hindered the formation of the giant planet around it. Our measurements of Gl 86 B and Gl 86 Ab's orbits reveal Gl 86 as a system in which giant planet formation took place in a disk truncated at $\approx$2$\,$AU. Such a disk would be just big enough to harbor the dust mass and total mass needed to assemble Gl 86 Ab's core and envelope, assuming a high disk accretion rate and a low viscosity. Inefficient accretion of the disk onto Gl 86 Ab, however, would require a disk massive enough to approach the Toomre stability limit at its outer truncation radius. The orbital architecture of the Gl 86 system shows that giant planets can form even in severely truncated disks and provides an important benchmark for planet formation theory.

AB - Gliese 86 is a nearby K dwarf hosting a giant planet on a $\approx$16-day orbit and an outer white dwarf companion on a $\approx$century-long orbit. In this study we combine radial velocity data (including new measurements spanning more than a decade) with high angular resolution imaging and absolute astrometry from Hipparcos and Gaia to measure the current orbits and masses of both companions. We then simulate the evolution of the Gl 86 system to constrain its primordial orbit when both stars were on the main sequence; the closest approach between the two stars was then about $9\,$AU. Such a close separation limited the size of the protoplanetary disk of Gl 86 A and dynamically hindered the formation of the giant planet around it. Our measurements of Gl 86 B and Gl 86 Ab's orbits reveal Gl 86 as a system in which giant planet formation took place in a disk truncated at $\approx$2$\,$AU. Such a disk would be just big enough to harbor the dust mass and total mass needed to assemble Gl 86 Ab's core and envelope, assuming a high disk accretion rate and a low viscosity. Inefficient accretion of the disk onto Gl 86 Ab, however, would require a disk massive enough to approach the Toomre stability limit at its outer truncation radius. The orbital architecture of the Gl 86 system shows that giant planets can form even in severely truncated disks and provides an important benchmark for planet formation theory.

KW - astro-ph.EP

KW - astro-ph.SR

M3 - Article

JO - The Astronomical Journal

JF - The Astronomical Journal

SN - 0004-6256

ER -