WASP-19b: THE SHORTEST PERIOD TRANSITING EXOPLANET YET DISCOVERED

By L. Hebb, A. Collier-Cameron, A. Triaud, T. Lister, B. Smalley, P. Maxted, C. Hellier, D. Anderson, D. Pollacco, M. Gillon and 12 more. 2010

136 citations recorded by the source corpus.

We report on the discovery of a new extremely short period transiting extrasolar planet, WASP-19b. The planet has mass Mpl = 1.15 ± 0.08 MJ, radius Rpl = 1.31 ± 0.06 RJ, and orbital period P = 0.7888399 ± 0.0000008 days. Through spectroscopic analysis, we determine the host star to be a slightly super-solar metallicity ([M/H] = 0.1 ± 0.1 dex) G-dwarf with Teff = 5500 ± 100 K. In addition, we detect periodic, sinusoidal flux variations in the light curve which are used to derive a rotation period for the star of Prot = 10.5 ± 0.2 days. The relatively short stellar rotation period suggests that either WASP-19 is somewhat young (∼ 600 Myr old) or tidal interactions between the two bodies have caused the planet to spiral inward over its lifetime resulting in the spin-up of the star. Due to the detection of the rotation period, this system has the potential to place strong constraints on the stellar tidal quality factor, Q′s, if a more precise age is determined.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/53da64d901222de9871db6466a7174b42e8ed170

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. Jon Fortney
2. N. Madhusudhan
3. D. Charbonneau
4. D. Deming
5. D. Sing
6. A. Showman
7. J. Winn
8. J. Southworth

Citations in the corpus

• Tidal Dissipation in Stars and Giant Planets (2014, background): “Among exoplanetary systems confirmed so far, the largest values are approximately 2×10−4 for the tide in a star (WASP-18; Hellier et al. 2009) and 6 × 10−2 for the tide in a planet (WASP-19 b; Hebb et al. 2010).”
• WASP-121 b: a hot Jupiter close to tidal disruption transiting an active F star (2015, background): “…Mp < 13 MJup and P < 12 d. WASP-121 b is one of the closest systems to tidal disruption, its direct competitors being WASP-12 b (Hebb et al. 2009), WASP-19 b (Hebb et al. 2010), WASP-103 b (Gillon et al. 2014), OGLE-TR-56 b (Konacki et al. 2003, Adams et al. 2011), and WTS-2 b (Birkby et al. 2014).”
• The TRAPPIST survey of southern transiting planets. I. Thirty eclipses of the ultra-short period planet WASP-43 b (2012, background): “The WASP transit survey detected two extreme examples of such ultra-short period planets, WASP-18 b (Hellier et al. 2009) and WASP-19 b (Hebb et al. 2010), both having an orbital period smaller than one day.”
• C/O RATIO AS A DIMENSION FOR CHARACTERIZING EXOPLANETARY ATMOSPHERES (2012, background): “WASP-19b C/O ratios in exoplanetary atmospheres 15 The transiting hot Jupiter WASP-19b orbits a G8 main-sequence star at a separation of 0.017 AU (Hebb et al. 2010).”
• Tidal dissipation in planet-hosting stars: damping of spin-orbit misalignment and survival of hot Jupiters (2011, background): “The observations of hot Jupiters with the shortest orbital periods (such as WASP18b, 0.94 d; WASP-19b, 0.79 d; and WASP-43b, 0.81 d; Hellier et al. 2009,2011; Hebb et al. 2010) suggest Q′⋆ >∼ 108 (see Brown et al. 2011).”
• On internal wave breaking and tidal dissipation near the centre of a solar-type star (2010, background): “In addition, a recently accepted paper reported the discovery of the latest candidate for the shortest period transiting planet, around the G-type star WASP-19 (Hebb et al. 2010).”
• An HST optical-to-near-IR transmission spectrum of the hot Jupiter WASP-19b: detection of atmospheric water and likely absence of TiO (2013, methodology): “Our measured radius ratio is larger than that measured by Dragomir et al. (2011) but smaller than those measured by Tregloan-Reed, Southworth & Tappert (2013) and that measured in the z band by Hebb et al. (2010).”
• THE NIRSPEC ULTRACOOL DWARF RADIAL VELOCITY SURVEY (2010, background): “There are a number of very massive planets known to orbit at these distances from Sun-like stars, including WASP-19b (Hebb et al. 2010), Corot2b (Bouchy et al. 2008), and WASP-14b (Joshi et al. 2009), though these massive hot Jupiters are relatively rare with a rate of occurrence of fP < 0.005 (Cumm”
• OBLIQUITIES OF HOT JUPITER HOST STARS: EVIDENCE FOR TIDAL INTERACTIONS AND PRIMORDIAL MISALIGNMENTS (2012, background): “WASP-19 WASP-19 is another system with a very short-period (0.78 d) hot Jupiter discovered by the WASP consortium (Hebb et al. 2010).”