Keele Research Repository

Kostov, VB, Orosz, JA, Feinstein, AD, Welsh, WF, Cukier, W, Haghighipour, N, Quarles, B, Martin, DV, Montet, BT, Torres, G, Triaud, AHMJ, Barclay, T, Boyd, P, Briceno, C, Cameron, AC, Correia, ACM, Gilbert, EA, Gill, S, Gillon, M, Haqq-Misra, J, Hellier, C, Dressing, C, Fabrycky, DC, Furesz, G, Jenkins, J, Kane, SR, Kopparapu, R, Hodzic, VK, Latham, DW, Law, N, Levine, AM, Li, G, Lintott, C, Lissauer, JJ, Mann, AW, Mazeh, T, Mardling, R, Maxted, PFL ORCID: https://orcid.org/0000-0003-3794-1317, Eisner, N, Pepe, F, Pepper, J, Pollacco, D, Quinn, SN, Quintana, EV, Rowe, JF, Ricker, G, Rose, ME, Seager, S, Santerne, A, Segransan, D, Short, DR, Smith, JC, Standing, MR, Tokovinin, A, Trifonov, T, Turner, O, Twicken, JD, Udry, S, Vanderspek, R, Winn, JN, Wolf, ET, Ziegler, C, Ansorge, P, Barnet, F, Bergeron, J, Huten, M, Pappa, G and van der Straeten, T (2020) TOI-1338: TESS' First Transiting Circumbinary Planet. Astronomical Journal, 159 (6).

Preview

Text Kostov_2020_AJ_159_253.pdf - Published Version Download (2MB) | Preview

Abstract

We report the detection of the first circumbinary planet (CBP) found by Transiting Exoplanet Survey Satellite (TESS). The target, a known eclipsing binary, was observed in sectors 1 through 12 at 30 minute cadence and in sectors 4 through 12 at 2 minute cadence. It consists of two stars with masses of 1.1 M ⊙ and 0.3 M ⊙ on a slightly eccentric (0.16), 14.6 day orbit, producing prominent primary eclipses and shallow secondary eclipses. The planet has a radius of ~6.9 R ⊕ and was observed to make three transits across the primary star of roughly equal depths (~0.2%) but different durations—a common signature of transiting CBPs. Its orbit is nearly circular (e ≈ 0.09) with an orbital period of 95.2 days. The orbital planes of the binary and the planet are aligned to within ~1°. To obtain a complete solution for the system, we combined the TESS photometry with existing ground-based radial-velocity observations in a numerical photometric-dynamical model. The system demonstrates the discovery potential of TESS for CBPs and provides further understanding of the formation and evolution of planets orbiting close binary stars.

Item Type:	Article
Additional Information:	This is the final published version (version of record). It was first published online via IOP Publishing at https://iopscience.iop.org/article/10.3847/1538-3881/ab8a48 - please refer to any applicable terms of use of the publisher.
Uncontrolled Keywords:	exoplanet astronomy, eclipsing binary stars
Subjects:	Q Science > QB Astronomy > QB460 Astrophysics
Related URLs:	Author
Depositing User:	Symplectic
Date Deposited:	02 Jun 2020 13:32
Last Modified:	02 Jun 2020 13:38
URI:	https://eprints.keele.ac.uk/id/eprint/8079

Actions (login required)

View Item