SIMBAD references

2023AJ....165..104D - Astron. J., 165, 104 (2023/March-0)

Emergent Spectral Fluxes of Hot Jupiters: An Abrupt Rise in Dayside Brightness Temperature Under Strong Irradiation.

DEMING D., LINE M.R., KNUTSON H.A., CROSSFIELD I.J.M., KEMPTON E.M.-R., KOMACEK T.D., WALLACK N.L. and FU G.

Abstract (from CDS):

We study the emergent spectral fluxes of transiting hot Jupiters, using secondary eclipses from Spitzer. To achieve a large and uniform sample, we have reanalyzed all secondary eclipses for all hot Jupiters observed by Spitzer at 3.6 and/or 4.5 μm. Our sample comprises 457 eclipses of 122 planets, including eclipses of 13 planets not previously published. We use these eclipse depths to calculate the spectral fluxes emergent from the exoplanetary atmospheres, and thereby infer the temperatures and spectral properties of hot Jupiters. We find that an abrupt rise in brightness temperature, similar to a phase change, occurs on the dayside atmospheres of the population at an equilibrium temperature between 1714 and 1818 K (99% confidence limits). The amplitude of the rise is 291 ± 49 K, and two viable causes are the onset of magnetic drag that inhibits longitudinal heat redistribution, and/or the rapid dissipation of dayside clouds. We also study hot Jupiter spectral properties with respect to metallicity and temperature inversions. Models exhibiting 4.5 μm emission from temperature inversions reproduce our fluxes statistically for the hottest planets, but the transition to emission is gradual, not abrupt. The Spitzer fluxes are sensitive to metallicity for planets cooler than ∼1200 K, and most of the hot Jupiter population falls between model tracks having solar to 30× solar metallicity.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Exoplanet astronomy - Exoplanet atmospheres - Hot Jupiters - Infrared astronomy

VizieR on-line data: <Available at CDS (J/AJ/165/104): table1.dat table2.dat table3.dat>

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 73

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2023AJ....165..104D and select 'bookmark this link' or equivalent in the popup menu