The Hubble WFC3 Emission Spectrum of the Extremely Hot Jupiter KELT-9b

AbstractWe present new observations of the emission spectrum of the hot Jupiter TrES-4 designed to test the theory that the presence of temperature inversions in the atmospheres of these planets are correlated with the amount of radiation received by the planet. Our observations reveal that TrES-4 has an emission spectrum similar to that of HD 209458b, which requires the presence of an inversion layer high in the atmosphere and water emission bands in order to explain the observed features, providing additional support for that theory. We also present new observations of the thermal phase curve of HD 189733b at 24 μm, which we combine with our previous observations at 8 μm to examine how circulation in this planet's atmosphere varies as a function of depth. We discuss the relationship between the strength of the day-night circulation on both planets and their other observable properties, in particular their emission spectra.

Download Full-text

Ground- and Space-based Detection of the Thermal Emission Spectrum of the Transiting Hot Jupiter KELT-2Ab

The Astronomical Journal ◽

10.3847/1538-3881/aad781 ◽

2018 ◽

Vol 156 (3) ◽

pp. 133 ◽

Cited By ~ 9

Author(s):

Danielle Piskorz ◽

Cam Buzard ◽

Michael R. Line ◽

Heather A. Knutson ◽

Björn Benneke ◽

...

Keyword(s):

Emission Spectrum ◽

Thermal Emission ◽

Thermal Emission Spectrum ◽

Hot Jupiter

Download Full-text

An HST/WFC3 Thermal Emission Spectrum of the Hot Jupiter HAT-P-7b

The Astronomical Journal ◽

10.3847/1538-3881/aac497 ◽

2018 ◽

Vol 156 (1) ◽

pp. 10 ◽

Cited By ~ 36

Author(s):

Megan Mansfield ◽

Jacob L. Bean ◽

Michael R. Line ◽

Vivien Parmentier ◽

Laura Kreidberg ◽

...

Keyword(s):

Emission Spectrum ◽

Thermal Emission ◽

Thermal Emission Spectrum ◽

Hot Jupiter

Download Full-text

Optical phase curve of the ultra-hot Jupiter WASP-121b

Astronomy and Astrophysics ◽

10.1051/0004-6361/201936647 ◽

2020 ◽

Vol 637 ◽

pp. A36 ◽

Cited By ~ 11

Author(s):

V. Bourrier ◽

D. Kitzmann ◽

T. Kuntzer ◽

V. Nascimbeni ◽

M. Lendl ◽

...

Keyword(s):

Emission Spectrum ◽

Heat Transport ◽

Temperature Inversion ◽

Phase Curve ◽

Optical Photometry ◽

Optical Phase ◽

Strong Deviation ◽

Hot Jupiter

We present the analysis of TESS optical photometry of WASP-121b, which reveals the phase curve of this transiting ultra-hot Jupiter. Its hotspot is located at the sub-stellar point, showing inefficient heat transport from the dayside (2870 ± 50 K) to the nightside (<2500 K at 3σ) at the altitudes probed by TESS. The TESS eclipse depth, measured at the shortest wavelength to date for WASP-121b, confirms the strong deviation from blackbody planetary emission. Our atmospheric retrieval on the complete emission spectrum supports the presence of a temperature inversion, which can be explained by the presence of VO and possibly TiO and FeH. The strong planetary emission at short wavelengths could arise from an H− continuum.

Download Full-text

Models of Thermodynamic Properties of Prominences

International Astronomical Union Colloquium ◽

10.1017/s0252921100065799 ◽

1979 ◽

Vol 44 ◽

pp. 349-355

Author(s):

R.W. Milkey

Keyword(s):

Thermodynamic Properties ◽

Mass Transport ◽

Emission Spectrum ◽

Thermodynamic Parameters ◽

Working Group ◽

Physical Processes ◽

Theoretical Concepts ◽

Group 3 ◽

Observational Techniques

The focus of discussion in Working Group 3 was on the Thermodynamic Properties as determined spectroscopically, including the observational techniques and the theoretical modeling of physical processes responsible for the emission spectrum. Recent advances in observational techniques and theoretical concepts make this discussion particularly timely. It is wise to remember that the determination of thermodynamic parameters is not an end in itself and that these are interesting chiefly for what they can tell us about the energetics and mass transport in prominences.

Download Full-text