Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: HD 189733 b Mapping 9th February 2012, 9:57 pm | |
| A Two-Dimensional Infrared Map of the Extrasolar Planet HD 189733b http://arxiv.org/abs/1202.1883 - Quote :
- We derive the first secondary eclipse map of an exoplanet, HD 189733b, based on Spitzer IRAC 8 micron data. We develop two complementary techniques for deriving the two dimensional planet intensity: regularized slice mapping and spherical harmonic mapping. Both techniques give similar derived intensity maps for the infrared day-side flux of the planet, while the spherical harmonic method can be extended to include phase variation data which better constrain the map. The longitudinal offset of the day-side hot spot is consistent with that found in prior studies, strengthening the claim of super-rotating winds, and eliminating the possibility of phase variations being caused by stellar variability. The latitude of the hot-spot is within 12.5 deg (68% confidence) of the planet's equator, confirming the predictions of general circulation models for hot Jupiters and indicative of a small planet obliquity.
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Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: Re: HD 189733 b Mapping 19th February 2012, 9:23 pm | |
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Lazarus dF star
Number of posts : 3337 Registration date : 2008-06-12
| Subject: Re: HD 189733 b Mapping 21st February 2012, 6:33 pm | |
| Hot Jupiters are weird. And I have to wonder how much of the variation between experimental results is due to weather and how much due to systematics. | |
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Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: Re: HD 189733 b Mapping 9th November 2012, 9:08 am | |
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| Subject: Re: HD 189733 b Mapping | |
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