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Broad-band spectrophotometry of HAT-P-32 b : search for a scattering signature in the planetary spectrum
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Mallonn, M., Bernt, I., Herrero, E., Hoyer, S., Kirk, James, Wheatley, Peter J., Seeliger, M., Mackebrandt, F., von Essen, C., Strassmeier, K. G., Granzer, T., Künstler, A., Dhillon, V. S., Marsh, Tom and Gaitan, J. (2016) Broad-band spectrophotometry of HAT-P-32 b : search for a scattering signature in the planetary spectrum. Monthly Notices of the Royal Astronomical Society, 463 (1). pp. 604-614. doi:10.1093/mnras/stw1999 ISSN 0035-8711.
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Official URL: http://dx.doi.org/10.1093/mnras/stw1999
Abstract
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.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
Library of Congress Subject Headings (LCSH): | Astronomical photometry, Spectrophotometry | ||||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||
Publisher: | Oxford University Press | ||||||||
ISSN: | 0035-8711 | ||||||||
Official Date: | November 2016 | ||||||||
Dates: |
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Volume: | 463 | ||||||||
Number: | 1 | ||||||||
Page Range: | pp. 604-614 | ||||||||
DOI: | 10.1093/mnras/stw1999 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 9 January 2017 | ||||||||
Date of first compliant Open Access: | 11 January 2017 | ||||||||
Funder: | Spain. Ministerio de Economía y Competitividad [Ministry of Economy and Competitiveness] (MINECO) | ||||||||
Grant number: | ESP2014-57495-C2-2-R |
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