Sökning: WFRF:(Feiden W) >
Kepler-445, Kepler-...
Kepler-445, Kepler-446 and the Occurrence of Compact Multiples Orbiting mid-M Dwarf Stars
-
Muirhead, Philip S. (författare)
-
Mann, Andrew W. (författare)
-
Vanderburg, Andrew (författare)
-
visa fler...
-
Morton, Timothy D. (författare)
-
Kraus, Adam (författare)
-
Ireland, Michael (författare)
-
Swift, Jonathan J. (författare)
-
- Feiden, Gregory A. (författare)
- Uppsala universitet,Teoretisk astrofysik
-
Gaidos, Eric (författare)
-
Gazak, J. Zachary (författare)
-
visa färre...
-
(creator_code:org_t)
- 2015
- 2015
- Engelska.
-
Ingår i: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 801:1
- Relaterad länk:
-
https://uu.diva-port... (primary) (Raw object)
-
visa fler...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- We confirm and characterize the exoplanetary systems Kepler-445 and Kepler-446: two mid-M dwarf stars, each with multiple, small, short-period transiting planets. Kepler-445 is a metal-rich ([ Fe/H] = + 0.25 0.10) M4 dwarf with three transiting planets, and Kepler-446 is a metal-poor ([ Fe/H] = -0.30 0.10) M4 dwarf also with three transiting planets. Kepler-445c is similar toGJ 1214b: both in planetary radius and the properties of the host star. The Kepler-446 system is similar to the Kepler-42 system: both are metal-poor with large galactic space velocities and three short-period, likely rocky transiting planets that were initially assigned erroneously large planet-to-star radius ratios. We independently determined stellar parameters from spectroscopy and searched for and fitted the transit light curves for the planets, imposing a strict prior on stellar density in order to remove correlations between the fitted impact parameter and planet-to-star radius ratio for short-duration transits. Combining Kepler-445, Kepler-446, and Kepler-42, and isolating all mid-M dwarf stars observed by Kepler with the precision necessary to detect similar systems, we calculate that 21+ 7 -5 % of mid-M dwarf stars host compact multiples ( multiple planets with periods of less than 10 days) for a wide range of metallicities. We suggest that the inferred planet masses for these systems support highly efficient accretion of protoplanetary disk metals by mid-M dwarf protoplanets.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- planetary systems
- stars: fundamental parameters
- stars: individual (KOI-2704
- KOI-2842
- Kepler-42
- Barnard's Star)
- stars: late-type
- stars: low-mass
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
-
Muirhead, Philip ...
-
Mann, Andrew W.
-
Vanderburg, Andr ...
-
Morton, Timothy ...
-
Kraus, Adam
-
Ireland, Michael
-
visa fler...
-
Swift, Jonathan ...
-
Feiden, Gregory ...
-
Gaidos, Eric
-
Gazak, J. Zachar ...
-
visa färre...
- Om ämnet
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Fysik
-
och Astronomi astrof ...
- Artiklar i publikationen
-
Astrophysical Jo ...
- Av lärosätet
-
Uppsala universitet