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Single transit candidates from K2: detection and period estimation
- Source :
- Monthly Notices of the Royal Astronomical Society. 457:2273-2286
- Publication Year :
- 2016
- Publisher :
- Oxford University Press (OUP), 2016.
-
Abstract
- Photometric surveys such as Kepler have the precision to identify exoplanet and eclipsing binary candidates from only a single transit. K2, with its 75d campaign duration, is ideally suited to detect significant numbers of single-eclipsing objects. Here we develop a Bayesian transit-fitting tool ("Namaste: An Mcmc Analysis of Single Transit Exoplanets") to extract orbital information from single transit events. We achieve favourable results testing this technique on known Kepler planets, and apply the technique to 7 candidates identified from a targeted search of K2 campaigns 1, 2 and 3. We find EPIC203311200 to host an excellent exoplanet candidate with a period, assuming zero eccentricity, of $540 ^{+410}_{-230}$ days and a radius of $0.51 \pm 0.05 R_{Jup}$. We also find six further transit candidates for which more follow-up is required to determine a planetary origin. Such a technique could be used in the future with TESS, PLATO and ground-based photometric surveys such as NGTS, potentially allowing the detection of planets in reach of confirmation by Gaia.<br />Comment: Submitted to MNRAS on 25th November 2015. 15 Pages
- Subjects :
- Physics
010308 nuclear & particles physics
media_common.quotation_subject
Binary number
Astronomy
Astronomy and Astrophysics
Astrophysics
Planetary system
01 natural sciences
Kepler
Exoplanet
Stars
Space and Planetary Science
Planet
0103 physical sciences
Astrophysics::Earth and Planetary Astrophysics
Transit (astronomy)
Eccentricity (behavior)
010303 astronomy & astrophysics
Astrophysics - Earth and Planetary Astrophysics
QB
media_common
Subjects
Details
- ISSN :
- 13652966 and 00358711
- Volume :
- 457
- Database :
- OpenAIRE
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Accession number :
- edsair.doi.dedup.....b03b2070d8b048337cfe1e29c887c692