期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 463, 期 1, 页码 604-614出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stw1999
关键词
techniques: photometric; planets and satellites: atmosphere; planets and satellites: individual: HAT-P-32 b
资金
- Spanish MINECO [ESP2014-57495-C2-2-R]
- STFC
- STFC [ST/I005773/1, ST/M001350/1, ST/L000733/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/L000733/1, ST/I005773/1, ST/M001350/1] Funding Source: researchfish
Multicolour broad-band transit observations offer the opportunity to characterize the atmosphere of an extrasolar planet with small- to medium-sized telescopes. One of the most favourable targets is the hot Jupiter HAT-P-32 b. We combined 21 new transit observations of this planet with 36 previously published light curves for a homogeneous analysis of the broad-band transmission spectrum from the Sloan u' band to the Sloan z' band. Our results rule out cloud-free planetary atmosphere models of solar metallicity. Furthermore, a discrepancy at reddest wavelengths to previously published results makes a recent tentative detection of a scattering feature less likely. Instead, the available spectral measurements of HAT-P-32 b favour a completely flat spectrum from the near-UV to the near-IR. A plausible interpretation is a thick cloud cover at high altitudes.
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