Delrez, L, Van Grootel, V, Anderson, DR, Collier-Cameron, A, Doyle, AP, Fumel, A, Gillon, M, Hellier, C ORCID: https://orcid.org/0000-0002-3439-1439, Jehin, E, Lendl, M, Neveu-VanMalle, M, Maxted, PFL ORCID: https://orcid.org/0000-0003-3794-1317, Pepe, F, Pollacco, D, Queloz, D, Segransan, D, Smalley, B ORCID: https://orcid.org/0000-0002-3456-087X, Smith, AMS, Southworth, J, Triaud, AHMJ, Udry, S and West, RG (2014) Transiting planets from WASP-South, Euler, and TRAPPIST WASP-68 b, WASP-73 b, and WASP-88 b, three hot Jupiters transiting evolved solar-type stars. Astronomy & Astrophysics, 563.

Full text not available from this repository.

Abstract

Using the WASP transit survey, we report the discovery of three new hot Jupiters, WASP-68 b, WASP-73 b and WASP-88 b. The planet WASP-68 bhas a mass of 0.95 ± 0.03 MJup, a radius of 1.24-0.06+0.10 RJup, and orbits a V = 10.7 G0-type star (1.24 ± 0.03 M⊙ 1.69-0.06+0.11 R⊙, Teff = 5911 ± 60 K) with a period of 5.084298 ± 0.000015 days. Its size is typical of hot Jupiters with similar masses. The planet WASP-73 bis significantly more massive (1.88-0.06+0.07 MJup) and slightly larger (1.16-0.08+0.12 RJup) than Jupiter. It orbits a V = 10.5 F9-type star (1.34-0.04+0.05 M⊙, 2.07-0.08+0.19 R⊙, Teff = 6036 ± 120 K) every 4.08722 ± 0.00022 days. Despite its high irradiation (~2.3 × 109 erg s-1 cm-2), WASP-73 b has a high mean density (1.20-0.30+0.26 ρJup) that suggests an enrichment of the planet in heavy elements. The planet WASP-88 bis a 0.56 ± 0.08 MJuphot Jupiter orbiting a V = 11.4 F6-type star (1.45 ± 0.05 M⊙, 2.08-0.06+0.12 R⊙, Teff = 6431 ± 130 K) with a period of 4.954000 ± 0.000019 days. With a radius of 1.70-0.07+0.13 RJup, it joins the handful of planets with super-inflated radii. The ranges of ages we determine through stellar evolution modeling are 4.5–7.0 Gyr for WASP-68, 2.8-5.7 Gyr for WASP-73 and 1.8–4.3 Gyr for WASP-88. The star WASP-73 appears to be significantly evolved, close to or already in the subgiant phase. The stars WASP-68 and WASP-88 are less evolved, although in an advanced stage of core H-burning.

Item Type: Article
Uncontrolled Keywords: planetary systems; photometric; radial velocities; spectroscopic
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Natural Sciences > School of Physical and Geographical Sciences
Related URLs:
Depositing User: Symplectic
Date Deposited: 30 Apr 2015 15:15
Last Modified: 20 May 2019 11:15
URI: http://eprints.keele.ac.uk/id/eprint/496

Actions (login required)

View Item View Item