SIMBAD references

2021AJ....161..247F - Astron. J., 161, 247-247 (2021/May-0)

NEMESIS: Exoplanet transit Survey of nearby M-dwarfs in TESS FFIs. I.

FELIZ D.L., PLAVCHAN P., BIANCO S.N., JIMENEZ M., COLLINS K.I., VILLARREAL ALVARADO B. and STASSUN K.G.

Abstract (from CDS):

In this work, we present an analysis of 33,054 M-dwarf stars, located within 100 parsecs, via the Transiting Exoplanet Survey Satellite (TESS) full-frame images (FFIs) of observed sectors 1-5. We present a new pipeline called NEMESIS, developed to extract detrended photometry, and to perform transit searches of single-sector data in TESS FFIs. As many M-dwarfs are faint, and are not observed with a two-minute cadence by TESS, FFI transit surveys can provide an empirical validation of how many planets are missed, using the 30-minute cadence data. In this work, we detect 183 threshold crossing events, and present 29 candidate planets for sectors 1-5, 24 of which are new detections. Our sample contains orbital periods ranging from 1.25 to 6.84 days, and planetary radii from 1.26 to 5.31 R⊕. With the addition of our new planet candidate detections, along with detections previously observed in sectors 1-5, we calculate an integrated occurrence rate of 2.49 ± 1.58 planets per star, for the period range ∈ [1, 9] days, and planet radius range ∈ [0.5,11] R⊕. We project an estimated yield of 122 ± 11 transit detections of nearby M-dwarfs. Of our new candidates, 23 have signal-to-noise ratios >7, transmission spectroscopy metrics >38, and emission spectroscopy metrics >10. We present all of our data products for our planet candidates via the Filtergraph data visualization service, located at https://filtergraph.com/NEMESIS.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Exoplanet astronomy - Exoplanet detection methods - M dwarf stars - Transit photometry - M stars

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 35

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