SIMBAD references

2013ApJ...768...42C - Astrophys. J., 768, 42 (2013/May-1)

WASP-8b: characterization of a cool and eccentric exoplanet with Spitzer.

CUBILLOS P., HARRINGTON J., MADHUSUDHAN N., STEVENSON K.B., HARDY R.A., BLECIC J., ANDERSON D.R., HARDIN M. and CAMPO C.J.

Abstract (from CDS):

WASP-8b has 2.18 times Jupiter's mass and is on an eccentric (e = 0.31) 8.16 day orbit. With a time-averaged equilibrium temperature of 948 K, it is one of the least-irradiated hot Jupiters observed with the Spitzer Space Telescope. We have analyzed six photometric light curves of WASP-8b during secondary eclipse observed in the 3.6, 4.5, and 8.0 µm Infrared Array Camera bands. The eclipse depths are 0.113%±0.018%, 0.069%±0.007%, and 0.093%±0.023%, respectively, giving respective brightness temperatures of 1552, 1131, and 938 K. We characterized the atmospheric thermal profile and composition of the planet using a line-by-line radiative transfer code and a Markov-chain Monte Carlo sampler. The data indicated no thermal inversion, independently of any assumption about chemical composition. We noted an anomalously high 3.6 µm brightness temperature (1552 K); by modeling the eccentricity-caused thermal variation, we found that this temperature is plausible for radiative timescales less than ∼102 hr. However, as no model spectra fit all three data points well, the temperature discrepancy remains as an open question.

Abstract Copyright:

Journal keyword(s): planetary systems - stars: individual: WASP-8 - techniques: photometric

Status at CDS : Large table(s) of objects being ingested in VizieR.

Simbad objects: 6

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2021.03.09-12:05:42

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