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The discovery and mass measurement of a new ultra-short-period Planet : K2-131b

Dai, Fei ; Winn, Joshua N. ; Gandolfi, Davide ; Wang, Sharon X. ; Teske, Johanna K. ; Burt, Jennifer ; Albrecht, Simon ; Barragán, Oscar ; Cochran, William D. and Endl, Michael , et al. (2017) In Astronomical Journal 154(6).
Abstract

We report the discovery of a new ultra-short-period planet and summarize the properties of all such planets for which the mass and radius have been measured. The new planet, K2-131b, was discovered in K2 Campaign 10. It has a radius of and orbits a G dwarf with a period of 8.9 hr. Radial velocities obtained with Magellan/PFS and TNG/HARPS-N show evidence for stellar activity along with orbital motion. We determined the planetary mass using two different methods: (1) the "floating chunk offset" method, based only on changes in velocity observed on the same night; and (2) a Gaussian process regression based on both the radial velocity and photometric time series. The results are consistent and lead to a mass measurement of and a mean... (More)

We report the discovery of a new ultra-short-period planet and summarize the properties of all such planets for which the mass and radius have been measured. The new planet, K2-131b, was discovered in K2 Campaign 10. It has a radius of and orbits a G dwarf with a period of 8.9 hr. Radial velocities obtained with Magellan/PFS and TNG/HARPS-N show evidence for stellar activity along with orbital motion. We determined the planetary mass using two different methods: (1) the "floating chunk offset" method, based only on changes in velocity observed on the same night; and (2) a Gaussian process regression based on both the radial velocity and photometric time series. The results are consistent and lead to a mass measurement of and a mean density of g cm-3.

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publishing date
type
Contribution to journal
publication status
published
keywords
individual (EPIC 228732031), planetary systems - stars
in
Astronomical Journal
volume
154
issue
6
article number
226
publisher
IOP Publishing
external identifiers
  • scopus:85039418309
ISSN
0004-6256
DOI
10.3847/1538-3881/aa9065
language
English
LU publication?
no
additional info
Publisher Copyright: © 2017. The American Astronomical Society. All rights reserved..
id
aecfc47a-ecac-473a-b577-6421a4e6c3c5
date added to LUP
2023-02-02 12:44:35
date last changed
2023-02-20 16:23:33
@article{aecfc47a-ecac-473a-b577-6421a4e6c3c5,
  abstract     = {{<p>We report the discovery of a new ultra-short-period planet and summarize the properties of all such planets for which the mass and radius have been measured. The new planet, K2-131b, was discovered in K2 Campaign 10. It has a radius of and orbits a G dwarf with a period of 8.9 hr. Radial velocities obtained with Magellan/PFS and TNG/HARPS-N show evidence for stellar activity along with orbital motion. We determined the planetary mass using two different methods: (1) the "floating chunk offset" method, based only on changes in velocity observed on the same night; and (2) a Gaussian process regression based on both the radial velocity and photometric time series. The results are consistent and lead to a mass measurement of and a mean density of g cm<sup>-3</sup>.</p>}},
  author       = {{Dai, Fei and Winn, Joshua N. and Gandolfi, Davide and Wang, Sharon X. and Teske, Johanna K. and Burt, Jennifer and Albrecht, Simon and Barragán, Oscar and Cochran, William D. and Endl, Michael and Fridlund, Malcolm and Hatzes, Artie P. and Hirano, Teruyuki and Hirsch, Lea A. and Johnson, Marshall C. and Bo Justesen, Anders and Livingston, John and Persson, Carina M. and Prieto-Arranz, Jorge and Vanderburg, Andrew and Alonso, Roi and Antoniciello, Giuliano and Arriagada, Pamela and Butler, R. P. and Cabrera, Juan and Crane, Jeffrey D. and Cusano, Felice and Csizmadia, Szilárd and Deeg, Hans and Dieterich, Sergio B. and Eigmüller, Philipp and Erikson, Anders and Everett, Mark E. and Fukui, Akihiko and Grziwa, Sascha and Guenther, Eike W. and Henry, Gregory W. and Howell, Steve B. and Johnson, John Asher and Korth, Judith and Kuzuhara, Masayuki and Narita, Norio and Nespral, David and Nowak, Grzegorz and Palle, Enric and Pätzold, Martin and Rauer, Heike and Rodríguez, Pilar Montañés and Shectman, Stephen A. and Smith, Alexis M.S. and Thompson, Ian B. and Eylen, Vincent Van and Williamson, Michael W. and Wittenmyer, Robert A.}},
  issn         = {{0004-6256}},
  keywords     = {{individual (EPIC 228732031); planetary systems - stars}},
  language     = {{eng}},
  number       = {{6}},
  publisher    = {{IOP Publishing}},
  series       = {{Astronomical Journal}},
  title        = {{The discovery and mass measurement of a new ultra-short-period Planet : K2-131b}},
  url          = {{http://dx.doi.org/10.3847/1538-3881/aa9065}},
  doi          = {{10.3847/1538-3881/aa9065}},
  volume       = {{154}},
  year         = {{2017}},
}