Examining the Broadband Emission Spectrum of WASP-19b: A New z-band Eclipse Detection

Zhou, George ORCID: https://orcid.org/0000-0002-4891-3517 and Kedziora-Chudczer, Lucyna and Bayliss, Daniel D. R. and Bailey, Jeremy (2013) Examining the Broadband Emission Spectrum of WASP-19b: A New z-band Eclipse Detection. The Astrophysical Journal, 774 (2):118. pp. 1-8. ISSN 1538-4357

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WASP-19b is one of the most irradiated hot-Jupiters known. Its secondary eclipse is the deepest of all transiting planets and has been measured in multiple optical and infrared bands. We obtained a z-band eclipse observation with a measured depth of 0.080% ± 0.029%, using the 2 m Faulkes Telescope South, which is consistent with the results of previous observations. We combined our measurement of the z-band eclipse with previous observations to explore atmosphere models of WASP-19b that are consistent with its broadband spectrum. We use the VSTAR radiative transfer code to examine the effect of varying pressure-temperature profiles and C/O abundance ratios on the emission spectrum of the planet. We find that models with super-solar carbon enrichment best match the observations, which is consistent with previous model retrieval studies. We also include upper atmosphere haze as another dimension in the interpretation of exoplanet emission spectra and find that particles <0.5 μm in size are unlikely to be present in WASP-19b.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 27 Jan 2022 23:26
Last Modified: 27 Jan 2022 23:26
Uncontrolled Keywords: planets and satellites: atmospheres; planets and satellites:; individual: WASP-19b; Astrophysics - Earth and Planetary Astrophysics
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
Identification Number or DOI: https://doi.org/10.1088/0004-637x/774/2/118
URI: http://eprints.usq.edu.au/id/eprint/45051

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