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Planet formation in intermediate-separation binary systems
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Panić, O., Haworth, T. J., Petr-Gotzens, M. G., Miley, J., van den Ancker, M., Vioque, M., Siess, L., Parker, R., Clarke, C. J., Kamp, I., Kennedy, Grant M., Oudmaijer, R. D., Pascucci, I., Richards, A. M. S., Ratzka, T. and Qi, C. (2021) Planet formation in intermediate-separation binary systems. Monthly Notices of the Royal Astronomical Society, 501 (3). pp. 4317-4328. doi:10.1093/mnras/staa3834 ISSN 1745-3933.
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WRAP-planet-formation-intermediate-separation-binary-systems-Kennedy-2021.pdf - Accepted Version - Requires a PDF viewer. Download (1876Kb) | Preview |
Official URL: http://dx.doi.org/10.1093/mnras/staa3834
Abstract
We report the first characterization of the individual discs in the intermediate-separation binary systems KK Oph and HD 144668 at millimetre wavelengths. In both systems, the circumprimary and the circumsecondary discs are detected in the millimetre continuum emission, but not in 13CO nor C18O lines. Even though the disc structure is only marginally resolved, we find indications of large-scale asymmetries in the outer regions of the primary discs, most likely due to perturbation by the companion. The derived dust masses are firmly above debris disc level for all stars. The primaries have about three times more dust in their discs than the secondaries. In the case of HD 144668, the opacity spectral index of the primary and secondary differ by a large margin of 0.69, which may be a consequence of the secondary disc being more compact. Upper limits on the gas masses imply less than 0.1 Mjup in any of these discs, meaning that giant planets can no longer form in them. Considering that there have been no massive gas discs identified to date in intermediate-separation binaries (i.e. binaries at a few hundred au separation), this opens space for speculation whether their binarity causes the removal of gas, with tidal interaction truncating the discs and hence shortening the accretion time-scale. More systematic studies in this respect are sorely needed.
Item Type: | Journal Article | ||||||||||||
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Subjects: | Q Science > QB Astronomy | ||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||
Library of Congress Subject Headings (LCSH): | Circumstellar matter, Double stars, Protoplanetary disks , Accretion (Astrophysics) , Planets -- Origin | ||||||||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||||||
Publisher: | Oxford University Press | ||||||||||||
ISSN: | 1745-3933 | ||||||||||||
Official Date: | March 2021 | ||||||||||||
Dates: |
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Volume: | 501 | ||||||||||||
Number: | 3 | ||||||||||||
Page Range: | pp. 4317-4328 | ||||||||||||
DOI: | 10.1093/mnras/staa3834 | ||||||||||||
Status: | Peer Reviewed | ||||||||||||
Publication Status: | Published | ||||||||||||
Reuse Statement (publisher, data, author rights): | This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record O Panić, T J Haworth, M G Petr-Gotzens, J Miley, M van den Ancker, M Vioque, L Siess, R Parker, C J Clarke, I Kamp, G Kennedy, R D Oudmaijer, I Pascucci, A M S Richards, T Ratzka, C Qi, Planet formation in intermediate-separation binary systems, Monthly Notices of the Royal Astronomical Society, Volume 501, Issue 3, March 2021, Pages 4317–4328, is available online at: https://doi.org/10.1093/mnras/staa3834 | ||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||
Date of first compliant deposit: | 29 January 2021 | ||||||||||||
Date of first compliant Open Access: | 1 February 2021 | ||||||||||||
RIOXX Funder/Project Grant: |
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Open Access Version: |
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