CaltechAUTHORS
Published February 2023 | Version Published + Supplemental Material
Journal Article Open

A systematic validation of hot Neptunes in TESS data

Creators

  • 1. ROR icon University of Naples Federico II
  • 2. ROR icon Astronomical Observatory of Capodimonte
  • 3. ROR icon Indian Institute of Technology Gandhinagar
  • 4. ROR icon European Southern Observatory
  • 5. ROR icon Parthenope University of Naples
  • 6. ROR icon University of California, Berkeley
  • 7. ROR icon University of Chile
  • 8. ROR icon Diego Portales University
  • 9. ROR icon Centro de Astrofísica y Tecnologías Afines
  • 10. ROR icon Ames Research Center
  • 11. ROR icon Harvard-Smithsonian Center for Astrophysics
  • 12. ROR icon Institute for Space Astrophysics and Planetology
  • 13. ROR icon Osservatorio Astrofisico di Catania
  • 14. ROR icon Goddard Space Flight Center
  • 15. ROR icon Stephen F. Austin State University
  • 16. ROR icon NASA Exoplanet Science Institute
  • 17. ROR icon University of California, Santa Cruz
  • 18. ROR icon Technical University of Denmark
  • 19. ROR icon United States Naval Observatory
  • 20. ROR icon University of Geneva

Abstract

We statistically validated a sample of hot Neptune candidates applying a two-step vetting technique using DAVE and TRICERATOPS. We performed a systematic validation of 250 transit-like events in the Transiting Exoplanet Survey Satellite archive in the parameter region defined by P ≤ 4d and 3R_⊕ ≤ R ≤ 5R_⊕ Through our analysis, we identified 18 hot Neptune-sized candidates, with a false positive probability < 50 per cent⁠. Nine of these planet candidates still need to be confirmed. For each of the nine targets, we retrieved the stellar parameters using ARIADNE and derived constraints on the planetary parameters by fitting the light curves with the juliet package. Within this sample of nine candidates, we statistically validated (i.e. with false positive probability < 0.3 per cent⁠) two systems (TOI-277 b and TOI-1288 b) by re-processing the candidates with TRICERATOPS along with follow-up observations. These new validated exoplanets expand the known hot Neptunes population and are high-priority targets for future radial velocities follow-up.

Additional Information

© 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model) This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. We acknowledge the use of the Exoplanet Follow-up Observation Program website, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. The TFOP is led by the Smithsonian Astrophysical Observatory (SAO), in coordination with MIT, as part of the TESS Science Office. This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC; https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. JSJ greatfully acknowledges support by FONDECYT grant 1201371 and from the ANID BASAL projects ACE210002 and FB210003. JIV acknowledges support of CONICYT-PFCHA/Doctorado Nacional-21191829. Software: DAVE (Kostov et al. 2019), TRICERATOPS (Giacalone et al. 2021), FORECASTER (Chen & Kipping 2017). DATA AVAILABILITY. The data underlying this article will be shared on reasonable request to the corresponding author. The main DAVE outcomes for the nine TOIs and the TRES extracted spectra of TIC 63898957, TIC 365733349, TIC 73540072 and TIC 146523262 are available in Supplementary data.

Attached Files

Published - stac3404.pdf

Supplemental Material - stac3404_supplemental_file.pdf

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Additional details

Identifiers

Eprint ID
120268
Resolver ID
CaltechAUTHORS:20230321-821389800.64

Funding

NASA/JPL/Caltech
Gaia Multilateral Agreement
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)
1201371
Agencia Nacional de Investigación y Desarrollo (ANID)
ACE210002
Agencia Nacional de Investigación y Desarrollo (ANID)
FB210003
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)
21191829

Dates

Created
2023-06-08
Created from EPrint's datestamp field
Updated
2023-06-08
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
Infrared Processing and Analysis Center (IPAC)