The near-UV transit of HD 189733b with the XMM-Newton optical monitor
Lecavelier Des Etangs, A.
AffiliationLunar and Planetary Laboratory, University of Arizona
KeywordsPlanets and satellites: atmospheres
Planets and satellites: individual: HD 189733b
Ultraviolet: planetary systems
MetadataShow full item record
PublisherOxford University Press
CitationKing, G. W., Corrales, L., Wheatley, P. J., Lavvas, P., Steinrueck, M. E., Bourrier, V., Ehrenreich, D., Lecavelier Des Etangs, A., & Louden, T. (2021). The near-UV transit of HD 189733b with the XMM-Newton optical monitor. Monthly Notices of the Royal Astronomical Society, 506(2), 2453–2458.
RightsCopyright © 2021 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.
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AbstractWe present analysis of XMM-Newton optical monitor observations in the near-ultraviolet of HD 189733, covering 20 primary transits of its hot Jupiter planet. The transit is clearly detected with both the UVW2 and UVM2 filters, and our fits to the data reveal transit depths in agreement with that observed optically. The measured depths correspond to radii of 1.059+0.046-0.050 and 0.94 +0.15-0.17 times the optically measured radius (1.187 RJ at 4950 Å) in the UVW2 and UVM2 bandpasses, respectively. We also find no statistically significant variation in the transit depth across the 8 yr baseline of the observations. We rule out extended broad-band absorption towards or beyond the Roche lobe at the wavelengths investigated, although observations with higher spectral resolution are required to determine if absorption out to those distances from the planet is present in individual near-UV lines. © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
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