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http://hdl.handle.net/20.500.12386/28064
Title: | An Accurate Mass Determination for Kepler-1655b, a Moderately Irradiated World with a Significant Volatile Envelope | Authors: | Haywood, Raphaëlle D. Vanderburg, Andrew Mortier, Annelies Giles, Helen A. C. López-Morales, Mercedes Lopez, Eric D. Malavolta, Luca Charbonneau, David Collier Cameron, Andrew Coughlin, Jeffrey L. Dressing, Courtney D. Nava, Chantanelle Latham, David W. Dumusque, Xavier Lovis, Christophe MOLINARI, Emilio Carlo Pepe, Francesco SOZZETTI, Alessandro Udry, Stéphane Bouchy, François Johnson, John A. Mayor, Michel MICELA, Giuseppina Phillips, David Piotto, Giampaolo Rice, Ken Sasselov, Dimitar Ségransan, Damien Watson, Chris AFFER, Laura BONOMO, ALDO STEFANO Buchhave, Lars A. Ciardi, David R. Fiorenzano, Aldo F. HARUTYUNYAN, AVET |
Issue Date: | 2018 | Journal: | THE ASTRONOMICAL JOURNAL | Number: | 155 | Issue: | 5 | First Page: | 203 | Abstract: | We present the confirmation of a small, moderately irradiated (F = 155 ± 7 F <SUB>⊕</SUB>) Neptune with a substantial gas envelope in a P = 11.8728787 ± 0.0000085 day orbit about a quiet, Sun-like G0V star Kepler-1655. Based on our analysis of the Kepler light curve, we determined Kepler-1655b’s radius to be 2.213 ± 0.082 R <SUB>⊕</SUB>. We acquired 95 high-resolution spectra with Telescopio Nazionale Galileo/HARPS-N, enabling us to characterize the host star and determine an accurate mass for Kepler-1655b of 5.0{+/- }<SUB>2.8</SUB><SUP>3.1</SUP> {M}<SUB>\oplus </SUB> via Gaussian-process regression. Our mass determination excludes an Earth-like composition with 98% confidence. Kepler-1655b falls on the upper edge of the evaporation valley, in the relatively sparsely occupied transition region between rocky and gas-rich planets. It is therefore part of a population of planets that we should actively seek to characterize further. | URI: | http://hdl.handle.net/20.500.12386/28064 | URL: | https://iopscience.iop.org/article/10.3847/1538-3881/aab8f3 | ISSN: | 0004-6256 | DOI: | 10.3847/1538-3881/aab8f3 | Bibcode ADS: | 2018AJ....155..203H | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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Haywood_2018_AJ_155_203.pdf | Pdf editoriale | 3.72 MB | Adobe PDF | View/Open |
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