文章基本信息

标题：TESS Phase Curve of the Hot Jupiter WASP-19b
本地全文：下载
作者：Ian Wong ; Björn Benneke ; Avi Shporer 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2020
卷号：159
期号：3
页码：1416-1424
DOI：10.3847/1538-3881/ab6d6e
语种：English
出版社：American Institute of Physics
摘要：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 ${470}_{-110}^{+130}$ 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 ${1090}_{-250}^{+190}$ 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.
关键词：Exoplanets;Hot Jupiters;Broad band photometry