Bibcode
Mallonn, M.; Bernt, I.; Herrero, E.; Hoyer, S.; Kirk, J.; Wheatley, P. J.; Seeliger, M.; Mackebrandt, F.; von Essen, C.; Strassmeier, K. G.; Granzer, T.; Künstler, A.; Dhillon, V. S.; Marsh, T. R.; Gaitan, J.
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 463, Issue 1, p.604-614
Fecha de publicación:
11
2016
Número de citas
23
Número de citas referidas
21
Descripción
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.