Standing, MR, Triaud, AHMJ, Faria, JP, Martin, DV, Boisse, I, Correia, ACM, Deleuil, M, Dransfield, G, Gillon, M, Hebrard, G, Hellier, C ORCID: https://orcid.org/0000-0002-3439-1439, Kunovac, V, Maxted, PFL ORCID: https://orcid.org/0000-0003-3794-1317, Mardling, R, Santerne, A, Sairam, L and Udry, S (2022) BEBOP II: sensitivity to sub-Saturn circumbinary planets using radial-velocities. Monthly Notices of the Royal Astronomical Society, 511 (3). 3571 - 3583.

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Abstract

BEBOP is a radial-velocity survey that monitors a sample of single-lined eclipsing binaries, in search of circumbinary planets by using high-resolution spectrographs. Here, we describe and test the methods we use to identify planetary signals within the BEBOP data and establish how we quantify our sensitivity to circumbinary planets by producing detection limits. This process is made easier and more robust by using a diffusive nested sampler. In the process of testing our methods, we notice that contrary to popular wisdom, assuming circular orbits in calculating detection limits for a radial-velocity survey provides overoptimistic detection limits by up to 40 per cent in semi-amplitude with implications for all radial-velocity surveys. We perform example analyses using three BEBOP targets from our Southern HARPS survey. We demonstrate for the first time a repeated ability to reach a residual root mean squared scatter of 3ms−1 (after removing the binary signal), and find that we are sensitive to circumbinary planets with masses down to that of Neptune and Saturn, for orbital periods up to 1000d⁠.

Item Type: Article
Additional Information: The final version of this article and all relevant information related to it, including copyrights, can be found on the publisher website.
Uncontrolled Keywords: techniques: radial velocities; planets and satellites: detection; binaries: eclipsing; stars: low-mass
Subjects: Q Science > QA Mathematics
Q Science > QB Astronomy
Q Science > QB Astronomy > QB460 Astrophysics
Q Science > QB Astronomy > QB600 Planets. Planetology
Q Science > QC Physics
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Related URLs:
Depositing User: Symplectic
Date Deposited: 22 Mar 2022 13:21
Last Modified: 22 Apr 2022 14:48
URI: https://eprints.keele.ac.uk/id/eprint/10757

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