Pith. sign in

REVIEW

Constraining the reflective properties of WASP-178b using Cheops photometry

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2309.09037 v1 pith:7XQ62G6T submitted 2023-09-16 astro-ph.EP

Constraining the reflective properties of WASP-178b using Cheops photometry

I. Pagano , G. Scandariato , V. Singh , M. Lendl , D. Queloz , A. E. Simon , S. G. Sousa , A. Brandeker
show 74 more authors
A. Collier Cameron S. Sulis V. Van Grootel T. G. Wilson Y. Alibert R. Alonso G. Anglada T. B\'arczy D. Barrado Navascues S. C. C. Barros W. Baumjohann M. Beck T. Beck W. Benz N. Billot X. Bonfils L. Borsato C. Broeg G. Bruno L. Carone S. Charnoz C. Corral van Damme Sz. Csizmadia P. E. Cubillos M. B. Davies M. Deleuil A. Deline L. Delrez O. D. S. Demangeon B.-O. Demory D. Ehrenreich A. Erikson A. Fortier L. Fossati M. Fridlund D. Gandolfi M. Gillon M. G\"udel M. N. G\"unther Ch. Helling S. Hoyer K. G. Isaak L. L. Kiss E. Kopp K. W. F. Lam J. Laskar A. Lecavelier des Etangs D. Magrin P. F. L. Maxted C. Mordasini M. Munari V. Nascimbeni G. Olofsson R. Ottensamer E. Pall\'e G. Peter G. Piotto D. Pollacco R. Ragazzoni N. Rando H. Rauer C. Reimers I. Ribas M. Rieder N. C. Santos D. S\'egransan A. M. S. Smith M. Stalport M. Steller Gy. M. Szab\'o N. Thomas S. Udry J. Venturini N. A. Walton
This is my paper
classification astro-ph.EP
keywords cheopsdepthwasp-178eclipseepsilonrecirculationtessalbedo
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
0 comments
read the original abstract

Multiwavelength photometry of the secondary eclipses of extrasolar planets is able to disentangle the reflected and thermally emitted light radiated from the planetary dayside. This leads to the measurement of the planetary geometric albedo $A_g$, which is an indicator of the presence of clouds in the atmosphere, and the recirculation efficiency $\epsilon$, which quantifies the energy transport within the atmosphere. In this work we aim to measure $A_g$ and $\epsilon$ for the planet WASP-178 b, a highly irradiated giant planet with an estimated equilibrium temperature of 2450 K.} We analyzed archival spectra and the light curves collected by Cheops and Tess to characterize the host WASP-178, refine the ephemeris of the system and measure the eclipse depth in the passbands of the two respective telescopes. We measured a marginally significant eclipse depth of 70$\pm$40 ppm in the Tess passband and statistically significant depth of 70$\pm$20 ppm in the Cheops passband. Combining the eclipse depth measurement in the Cheops (lambda_eff=6300 AA) and Tess (lambda_eff=8000 AA) passbands we constrained the dayside brightness temperature of WASP-178 b in the 2250-2800 K interval. The geometric albedo 0.1<$\rm A_g$<0.35 is in general agreement with the picture of poorly reflective giant planets, while the recirculation efficiency $\epsilon>$0.7 makes WASP-178 b an interesting laboratory to test the current heat recirculation models.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.