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Title: PROBING TRAPPIST-1-LIKE SYSTEMS WITH K2

Abstract

The search for small planets orbiting late M dwarfs holds the promise of detecting Earth-size planets for which their atmospheres could be characterized within the next decade. The recent discovery of TRAPPIST-1 entertains hope that these systems are common around hosts located at the bottom of the main sequence. In this Letter, we investigate the ability of the repurposed Kepler mission ( K2 ) to probe planetary systems similar to TRAPPIST-1. We perform a consistent data analysis of 189 spectroscopically confirmed M5.5 to M9 late M dwarfs from Campaigns 1–6 to search for planet candidates and inject transit signals with properties matching TRAPPIST-1b and c. We find no transiting planet candidates across our K2 sample. Our injection tests show that K2 is able to recover both TRAPPIST-1 planets for 10% of the sample only, mainly because of the inefficient throughput at red wavelengths resulting in Poisson-limited performance for these targets. Increasing injected planetary radii to match GJ 1214b’s size yields a recovery rate of 70%. The strength of K2 is its ability to probe a large number of cool hosts across the different campaigns, out of which the recovery rate of 10% may turn into bona fide detections of TRAPPIST-1-likemore » systems within the next two years.« less

Authors:
; ;  [1];  [2];  [3]
  1. Astrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge CB3 0HE (United Kingdom)
  2. Physikalisches Institut and Center for Space and Habitability, Universität Bern, 3012 Bern (Switzerland)
  3. Institut d’Astrophysique et de Geophysique, Universite de Liege, Allee du 6 Aout 17, Bat. B5C, B-4000 Liege (Belgium)
Publication Date:
OSTI Identifier:
22654278
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 825; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ATMOSPHERES; DATA ANALYSIS; DETECTION; DWARF STARS; INJECTION; PERFORMANCE; PLANETS; PROBES; WAVELENGTHS

Citation Formats

Demory, Brice-Olivier, Queloz, Didier, Gillen, Ed, Alibert, Yann, and Gillon, Michael, E-mail: bod21@cam.ac.uk. PROBING TRAPPIST-1-LIKE SYSTEMS WITH K2. United States: N. p., 2016. Web. doi:10.3847/2041-8205/825/2/L25.
Demory, Brice-Olivier, Queloz, Didier, Gillen, Ed, Alibert, Yann, & Gillon, Michael, E-mail: bod21@cam.ac.uk. PROBING TRAPPIST-1-LIKE SYSTEMS WITH K2. United States. doi:10.3847/2041-8205/825/2/L25.
Demory, Brice-Olivier, Queloz, Didier, Gillen, Ed, Alibert, Yann, and Gillon, Michael, E-mail: bod21@cam.ac.uk. 2016. "PROBING TRAPPIST-1-LIKE SYSTEMS WITH K2". United States. doi:10.3847/2041-8205/825/2/L25.
@article{osti_22654278,
title = {PROBING TRAPPIST-1-LIKE SYSTEMS WITH K2},
author = {Demory, Brice-Olivier and Queloz, Didier and Gillen, Ed and Alibert, Yann and Gillon, Michael, E-mail: bod21@cam.ac.uk},
abstractNote = {The search for small planets orbiting late M dwarfs holds the promise of detecting Earth-size planets for which their atmospheres could be characterized within the next decade. The recent discovery of TRAPPIST-1 entertains hope that these systems are common around hosts located at the bottom of the main sequence. In this Letter, we investigate the ability of the repurposed Kepler mission ( K2 ) to probe planetary systems similar to TRAPPIST-1. We perform a consistent data analysis of 189 spectroscopically confirmed M5.5 to M9 late M dwarfs from Campaigns 1–6 to search for planet candidates and inject transit signals with properties matching TRAPPIST-1b and c. We find no transiting planet candidates across our K2 sample. Our injection tests show that K2 is able to recover both TRAPPIST-1 planets for 10% of the sample only, mainly because of the inefficient throughput at red wavelengths resulting in Poisson-limited performance for these targets. Increasing injected planetary radii to match GJ 1214b’s size yields a recovery rate of 70%. The strength of K2 is its ability to probe a large number of cool hosts across the different campaigns, out of which the recovery rate of 10% may turn into bona fide detections of TRAPPIST-1-like systems within the next two years.},
doi = {10.3847/2041-8205/825/2/L25},
journal = {Astrophysical Journal Letters},
number = 2,
volume = 825,
place = {United States},
year = 2016,
month = 7
}
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