Journal
ASTRONOMICAL JOURNAL
Volume 161, Issue 5, Pages -Publisher
IOP Publishing Ltd
DOI: 10.3847/1538-3881/abedb3
Keywords
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Categories
Funding
- NASA [17-XRP17 2-0024, 80NSSC20K0251, 80NSSC21K0349]
- NASA XRP grant [80NSSC18K0445]
- National Science Foundation [1716202, 2006517]
- Mount Cuba Astronomical Foundation
- George Mason University
- Central American-Caribbean Bridge in Astrophysics remote-REU program
- NASA (Exoplanet Exploration Program)
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [2006517, 1716202] Funding Source: National Science Foundation
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In this work, a large analysis of 33,054 M-dwarf stars within 100 parsecs was conducted using TESS full-frame images. A new pipeline called NEMESIS was developed for detrended photometry extraction and transit searches, leading to the detection of 183 threshold crossing events and 29 candidate planets for sectors 1-5.
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-circle plus. 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 is an element of [1, 9] days, and planet radius range is an element of [0.5,11] R-circle plus. 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..
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