TY - JOUR
T1 - Examining the broadband emission spectrum of WASP-19b
T2 - A new z-band eclipse detection
AU - Zhou, George
AU - Kedziora-Chudczer, Lucyna
AU - Bayliss, Daniel D.R.
AU - Bailey, Jeremy
PY - 2013/9/10
Y1 - 2013/9/10
N2 - 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.
AB - 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.
KW - planets and satellites: atmospheres
KW - planets and satellites: individual (WASP-19b)
UR - http://www.scopus.com/inward/record.url?scp=84883634885&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/774/2/118
DO - 10.1088/0004-637X/774/2/118
M3 - Article
SN - 0004-637X
VL - 774
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 118
ER -