Authors

J. Blecic; J. Harrington; N. Madhusudhan; K. B. Stevenson; R. A. Hardy; P. E. Cubillos; M. Hardin; O. Bowman; S. Nymeyer; D. R. Anderson; C. Hellier; A. M. S. Smith;A. C. Cameron

Comments

Authors: contact us about adding a copy of your work at [email protected]

Abbreviated Journal Title

Astrophys. J.

Keywords

eclipses; planets and satellites: atmospheres; planets and satellites:; individual (WASP-43b); techniques: photometric; COLLISION-INDUCED ABSORPTION; HUBBLE-SPACE-TELESCOPE; INFRARED ARRAY; CAMERA; SUPER-EARTH GJ1214B; PLANET HD 189733B; EXOPLANET GJ 436B; LOW-MASS STARS; 8 MU-M; HOT JUPITERS; WARM SPITZER; Astronomy & Astrophysics

Abstract

WASP-43b is one of the closest-orbiting hot Jupiters, with a semimajor axis of a = 0.01526 +/- 0.00018 AU and a period of only 0.81 days. However, it orbits one of the coolest stars with a hot Jupiter (T-* = 4520 +/- 120 K), giving the planet a modest equilibrium temperature of T-eq = 1440 +/- 40 K, assuming zero Bond albedo and uniform planetary energy redistribution. The eclipse depths and brightness temperatures from our jointly fit model are 0.347% +/- 0.013% and 1670 +/- 23 K at 3.6 mu m and 0.382% +/- 0.015% and 1514 +/- 25 K at 4.5 mu m. The eclipse timings improved the estimate of the orbital period, P, by a factor of three (P = 0.81347436 +/- 1.4 x 10(-7) days) and put an upper limit on the eccentricity (e = 0.010(-0.007)(+0.010)). We use our Spitzer eclipse depths along with four previously reported ground-based photometric observations in the near- infrared to constrain the atmospheric properties of WASP- 43b. The data rule out a strong thermal inversion in the dayside atmosphere of WASP- 43b. Model atmospheres with no thermal inversions and fiducial oxygen-rich compositions are able to explain all the available data. However, a wide range of metallicities and C/ O ratios can explain the data. The data suggest low day-night energy redistribution in the planet, consistent with previous studies, with a nominal upper limit of about 35% for the fraction of energy incident on the dayside that is redistributed to the nightside.

Journal Title

Astrophysical Journal

Volume

781

Issue/Number

2

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

11

WOS Identifier

WOS:000331171200060

ISSN

0004-637X

Download

Share

COinS
 

Accessibility Statement

This item was created or digitized prior to April 24, 2027, or is a reproduction of legacy media created before that date. It is preserved in its original, unmodified state specifically for research, reference, or historical recordkeeping. In accordance with the ADA Title II Final Rule, the University Libraries provides accessible versions of archival materials upon request. To request an accommodation for this item, please submit an accessibility request form.