TESS Phase Curve of the Hot Jupiter WASP-19b
Name
Wong_2020_AJ_159_104.pdf
Description
Published version
Size
2.99 MB
Format
Adobe PDF
Checksum (MD5)
33016edf1fe91ce1c4fcae485f451fb6
Author(s)
Wong, Ian
Benneke, Björn
Shporer, Abraham-Avi
Fetherolf, Tara
Kane, Stephen R.
Ricker, George R
Vanderspek, Roland K
Seager, Sara
Winn, Joshua N.
Collins, Karen A.
Date Issued
February 2020
Journal
Astronomical Journal
Publisher
American Astronomical Society
Citation
Wong, Ian et al. "TESS Phase Curve of the Hot Jupiter WASP-19b." Astronomical Journal 159, 3 (February 2019): 104 © 2020 The American Astronomical Society
Version
Final published version
Abstract
We analyze the phase curve of the short-period transiting hot Jupiter system WASP-19, which was observed by the Transiting Exoplanet Survey Satellite (TESS) in Sector 9. WASP-19 is one of only five transiting exoplanet systems with full-orbit phase curve measurements at both optical and infrared wavelengths. We measure a secondary eclipse depth of 470[subscript -110][superscript +130] ppm and detect a strong atmospheric brightness modulation signal with a semiamplitude of 319 ± 51 ppm. No significant offset is detected between the substellar point and the region of maximum brightness on the dayside. There is also no significant nightside flux detected, which is in agreement with the nightside effective blackbody temperature of 1090[subscript -250][superscript +190] derived from the published Spitzer phase curves for this planet. Placing the eclipse depth measured in the TESS bandpass alongside the large body of previous values from the literature, we carry out the first atmospheric retrievals of WASP-19b's secondary eclipse spectrum using the SCARLET code. The retrieval analysis indicates that WASP-19b has a dayside atmosphere consistent with an isotherm at T = 2240 ± 40 K and a visible geometric albedo of 0.16 ± 0.04, indicating significant contribution from reflected starlight in the TESS bandpass and moderately efficient day–night heat transport.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
MIT Kavli Institute for Astrophysics and Space Research
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.3847/1538-3881/ab6d6e
