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| Titel |
The NUV transit of WASP-12b as observed using the Hubble Space Telescope: examining the star-planet interaction |
| VerfasserIn |
Jonathan Nichols, Richard Alexander, Dmitry Bisikalo, Matt Burleigh, Sarah Casewell, John Clarke, Stan Cowley, Mike Goad, Graham Wynn |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250100098
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| Publikation (Nr.) |
 EGU/EGU2014-15981.pdf |
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| Zusammenfassung |
| In this presentation we discuss recent Cycle 21 observations of the NUV transit of the extreme ‘hot Jupiter’ exoplanet WASP-12b using the Cosmic Origins Spectrograph (COS) onboard the Hubble Space Telescope. Four closely-spaced transits of the planet were observed in October/November 2013 over 20 orbits, which executed at interleaved phases to obtain a transit light-curve at relatively high phase resolution. Previous observations of the NUV transit of this planet have suggested the observed NUV flux is reduced ahead of optical ingress, indicating a region of more dense absorbing matter ahead of the planet in its orbit. Two proposed causes for this phenomenon are hydrodynamic outflow and the magnetosheath surround a magnetosphere. We discuss these new observations of the shape of the transit, focusing on the early phases before and during optical ingress, and consider the implications for the star-planet interaction and the magnetic field of the planet. |
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