Su, Kate Y. L., Kennedy, Grant M. and Yelverton, Ben (2020) No significant correlation between radial velocity planet presence and debris disc properties. Monthly Notices of the Royal Astronomical Society, 495 (2). pp. 1943-1957. doi:10.1093/mnras/staa1316

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Abstract

We investigate whether the tentative correlation between planets and debris discs which has been previously identified can be confirmed at high significance. We compile a sample of 201 stars with known planets and existing far-infrared observations. The sample is larger than those studied previously since we include targets from an unpublished Herschel survey of planet hosts. We use spectral energy distribution modelling to characterize Kuiper belt analogue debris discs within the sample, then compare the properties of the discs against a control sample of 294 stars without known planets. Survival analysis suggests that there is a significant (p ∼ 0.002) difference between the disc fractional luminosity distributions of the two samples. However, this is largely a result of the fact that the control sample contains a higher proportion of close binaries and of later-type stars; both of these factors are known to reduce disc detection rates. Considering only Sun-like stars without close binary companions in each sample greatly reduces the significance of the difference (p ∼ 0.3). We also find no evidence for a difference in the disc fractional luminosities of stars hosting planets more or less massive than Saturn (p ∼ 0.9). Finally, we find that the planet hosts have cooler discs than the control stars, but this is likely a detection bias, since the warmest discs in the control sample are also the faintest, and would thus be undetectable around the more distant planet hosts. Considering only discs in each sample that could have been detected around a typical planet host, we find p ∼ 0.07 for the temperatures.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy T Technology > TL Motor vehicles. Aeronautics. Astronautics
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Circumstellar matter , Space debris , Kuiper Belt
Journal or Publication Title:	Monthly Notices of the Royal Astronomical Society
Publisher:	Wiley
ISSN:	0035-8711
Official Date:	June 2020
Dates:	Date Event June 2020 Published 13 May 2020 Available 6 May 2020 Accepted
Date of first compliant deposit:	23 June 2020
Volume:	495
Number:	2
Page Range:	pp. 1943-1957
DOI:	10.1093/mnras/staa1316
Status:	Peer Reviewed
Publication Status:	Published
Publisher Statement:	This is a pre-copyedited, author-produced version of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record Ben Yelverton, Grant M Kennedy, Kate Y L Su, No significant correlation between radial velocity planet presence and debris disc properties, Monthly Notices of the Royal Astronomical Society, Volume 495, Issue 2, June 2020, Pages 1943–1957 is available online at: http://dx.doi.org/10.1093/mnras/staa1316
Access rights to Published version:	Restricted or Subscription Access
RIOXX Funder/Project Grant:	Project/Grant ID RIOXX Funder Name Funder ID UNSPECIFIED [STFC] Science and Technology Facilities Council http://dx.doi.org/10.13039/501100000271 UNSPECIFIED University of Cambridge.‏ ‎Institute of Astronomy http://viaf.org/viaf/146495708 UNSPECIFIED Royal Society http://dx.doi.org/10.13039/501100000288
Open Access Version:	ArXiv

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