Skip to main content

Warm Spitzer Observations of Three Hot Exoplanets: XO-4b, HAT-P-6b, and HAT-P-8b

Author(s): Todorov, Kamen O; Deming, Drake; Knutson, Heather A; Burrows, Adam S; Sada, Pedro V; et al

Download
To refer to this page use: http://arks.princeton.edu/ark:/88435/pr1369r
Full metadata record
DC FieldValueLanguage
dc.contributor.authorTodorov, Kamen O-
dc.contributor.authorDeming, Drake-
dc.contributor.authorKnutson, Heather A-
dc.contributor.authorBurrows, Adam S-
dc.contributor.authorSada, Pedro V-
dc.contributor.authorCowan, Nicolas B-
dc.contributor.authorAgol, Eric-
dc.contributor.authorDesert, Jean-Michel-
dc.contributor.authorFortney, Jonathan J-
dc.contributor.authorCharbonneau, David-
dc.contributor.authorLaughlin, Gregory-
dc.contributor.authorLangton, Jonathan-
dc.contributor.authorShowman, Adam P-
dc.contributor.authorLewis, Nikole K-
dc.date.accessioned2019-04-10T19:32:00Z-
dc.date.available2019-04-10T19:32:00Z-
dc.date.issued2012-02-10en_US
dc.identifier.citationTodorov, Kamen O, Deming, Drake, Knutson, Heather A, Burrows, Adam, Sada, Pedro V, Cowan, Nicolas B, Agol, Eric, Desert, Jean-Michel, Fortney, Jonathan J, Charbonneau, David, Laughlin, Gregory, Langton, Jonathan, Showman, Adam P, Lewis, Nikole K. (2012). Warm Spitzer Observations of Three Hot Exoplanets: XO-4b, HAT-P-6b, and HAT-P-8b. apj, 746 (111 - 111. doi:10.1088/0004-637X/746/1/111en_US
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1369r-
dc.description.abstractWe analyze Warm Spitzer/Infrared Array Camera observations of the secondary eclipses of three planets, XO-4b, HAT-P-6b, and HAT-P-8b. We measure secondary eclipse amplitudes at 3.6μm and 4.5μm for each target. XO-4b exhibits a stronger eclipse depth at 4.5μm than at 3.6μm, which is consistent with the presence of a temperature inversion. HAT-P-8b shows a stronger eclipse amplitude at 3.6μm and is best described by models without a temperature inversion. The eclipse depths of HAT-P-6b can be fitted with models with a small or no temperature inversion. We consider our results in the context of a postulated relationship between stellar activity and temperature inversion and a relationship between irradiation level and planet dayside temperature, as discussed by Knutson et al. and Cowan & Agol, respectively. Our results are consistent with these hypotheses, but do not significantly strengthen them. To measure accurate secondary eclipse central phases, we require accurate ephemerides. We obtain primary transit observations and supplement them with publicly available observations to update the orbital ephemerides of the three planets. Based on the secondary eclipse timing, we set upper boundaries for e cos(ω) for HAT-P-6b, HAT-P-8b, and XO-4b and find that the values are consistent with circular orbits.en_US
dc.language.isoen_USen_US
dc.relation.ispartofAstrophysical Journalen_US
dc.rightsFinal published version. This is an open access article.en_US
dc.titleWarm Spitzer Observations of Three Hot Exoplanets: XO-4b, HAT-P-6b, and HAT-P-8ben_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.1088/0004-637X/746/1/111-
dc.date.eissued2012-01-27en_US
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

Files in This Item:
File Description SizeFormat 
Todorov_2012_ApJ_746_111.pdf7.27 MBAdobe PDFView/Download


Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.