A search for transiting planets around FGKM dwarfs and sub-giants in the TESS Full Frame Images of the Southern ecliptic hemisphere

Abstract

In this work, we present the analysis of 976 814 FGKM dwarf and sub-giant stars in the TESS Full Frame Images (FFIs) of the Southern ecliptic hemisphere. We present a new pipeline, DIAmante, developed to extract optimized, multi-sector photometry from TESS FFIs and a classifier, based on the Random Forest technique, trained to discriminate plausible transiting planetary candidates from common false positives. A new statistical model was developed to provide the probability of correct identification of the source of variability. We restricted the planet search to the stars located in the least crowded regions of the sky and identified 396 transiting planetary candidates among which 252 are new detections. The candidates' radius distribution ranges between 1 R${}_{\oplus }$ and 2.6 R${}_{\mathrm{J}}$ with median value of 1 R${}_{\mathrm{J}}$ and the period distribution ranges between 0.25 days and 105 days with median value of 3.8 days. The sample contains four long period candidates (P>50 days) one of which is new and 64 candidates with periods between 10 and 50 days (42 new ones). In the small planet radius domain (R<4 R${}_{\oplus }$) we found 39 candidates among which 15 are new detections. Additionally, we present 15 single transit events (14 new ones), a new candidate multi-planetary system and a novel candidate around a known TOI. By using {\it Gaia} dynamical constraints we found that 70 objects show evidence of binarity. We release a catalog of the objects we analyzed and the corresponding lightcurves and diagnostic figures through the MAST and ExoFOP portals.

Accepted by MNRAS. Data available at https://archive.stsci.edu/hlsp/diamante

References in corpus (14)

• The James Webb Space Telescope
• The K2 Mission: Characterization and Early results
• Gaia Data Release 3 Properties and validation of the radial velocities
• Limb darkening and exoplanets: testing stellar model atmospheres and identifying biases in transit parameters
• The Exoplanet Orbit Database II: Updates to exoplanets.org
• A New Algorithm For Difference Image Analysis
• WASP-4b Arrived Early for the TESS Mission
• Cluster Difference Imaging Photometric Survey. I. Light Curves of Stars in Open Clusters from TESS Sectors 6 & 7
• A PSF-based Approach to TESS High quality data Of Stellar clusters (PATHOS) -- I. Search for exoplanets and variable stars in the field of 47 Tuc
• A PSF-based Approach to TESS High quality data Of Stellar clusters (PATHOS) -- II. Search for exoplanets in open clusters of the southern ecliptic hemisphere and their frequency
• AutoRegressive Planet Search: Application to the Kepler Mission
• Planet Detection Simulations for Several Possible TESS Extended Missions
• AutoRegressive Planet Search: Methodology
• The XUV irradiation and likely atmospheric escape of the super-Earth $\pi$ Men c

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