
Judith Korth
Postdoc

K2-141 b : A 5- M ⊗ super-Earth transiting a K7 v star every 6.7 h
Author
Summary, in English
We report on the discovery of K2-141 b (EPIC 246393474 b), an ultra-short-period super-Earth on a 6.7 h orbit transiting an active K7 V star based on data from K2 campaign 12. We confirmed the planet's existence and measured its mass with a series of follow-up observations: seeing-limited Muscat imaging, NESSI high-resolution speckle observations, and FIES and HARPS high-precision radial-velocity monitoring. K2-141 b has a mass of 5.31 ± 0.46 M⊗ and radius of 1.54-0.09+0.10 R⊗, yielding a mean density of 8.00-1.45+1.83 g cm-3 and suggesting a rocky-iron composition. Models indicate that iron cannot exceed ∼70% of the total mass. With an orbital period of only 6.7 h, K2-141 b is the shortest-period planet known to date with a precisely determined mass.
Publishing year
2018-04-01
Language
English
Publication/Series
Astronomy and Astrophysics
Volume
612
Document type
Journal article
Publisher
EDP Sciences
Keywords
- Planetary systems
- Planets and satellites: individual: EPIC 246393474 b
- Stars: fundamental parameters
- Stars: individual: EPIC 246393474
- Techniques: photometric
- Techniques: radial velocities
Status
Published
ISBN/ISSN/Other
- ISSN: 0004-6361