A new yield simulator for transiting planets and false positives: application to the Next Generation Transit Survey

Günther, Maximilian N.; Queloz, Didier; Demory, Brice-Olivier; Bouchy, Francois (2016). A new yield simulator for transiting planets and false positives: application to the Next Generation Transit Survey. Monthly notices of the Royal Astronomical Society, 465(3), pp. 3379-3389. Oxford University Press 10.1093/mnras/stw2908

Preview

Text stw2908.pdf - Published Version Available under License Publisher holds Copyright. Download (1MB) | Preview

We present a yield simulator to predict the number and characteristics of planets, false positives and false alarms in transit surveys. The simulator is based on a galactic model and the planet occurrence rates measured by the Kepler mission. It takes into account the observation window function and measured noise levels of the investigated survey. Additionally, it includes vetting criteria to identify false positives. We apply this simulator to the Next Generation Transit Survey (NGTS), a wide-field survey designed to detect transiting Neptune-sized exoplanets. We find that red noise is the main limitation of NGTS up to 14 mag, and that its obtained level determines the expected yield. Assuming a red noise level of 1 mmag, the simulation predicts the following for a 4-yr survey: 4 ± 3 Super-Earths, 19 ± 5 Small Neptunes, 16 ± 4 Large Neptunes, 55 ± 8 Saturn-sized planets and 150 ± 10 Jupiter-sized planets, along with 4688 ± 45 eclipsing binaries and 843 ± 75 background eclipsing binaries. We characterize the properties of these objects to enhance the early identification of false positives and discuss follow-up strategies for transiting candidates.

Interest & Impact

Downloads

19 since deposited on 05 Apr 2022
19 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item