Revised Exoplanet Radii and Habitability Using Gaia Data Release 2
Daniel Johns, Connor Marti, Madison Huff, Jacob McCann, Robert A., Wittenmyer, Jonathan Horner, Duncan J. Wright

TL;DR
This study uses Gaia DR2 data to revise stellar and exoplanet properties, leading to updated exoplanet radii, densities, and habitability assessments, including the identification of new potentially habitable planets.
Contribution
It provides revised exoplanet parameters and habitability status using Gaia DR2 data, emphasizing the importance of updated stellar data for accurate exoplanet characterization.
Findings
Revised exoplanet radii with a mean increase of 3.76%.
Identification of three new potentially habitable exoplanets.
Updated densities for CoRoT-3 b and KELT-1 b.
Abstract
Accurate stellar properties are crucial for determining exoplanet characteristics. Gaia DR2 presents revised distances, luminosities, and radii for 1.6 billion stars. Here, we report the calculation of revised radii and densities for 320 exoplanets using this data and present updated calculations of the incident flux received by 690 known exoplanets. This allows the likelihood that those planets orbit in the habitable zone of their host stars to be reassessed. As a result of this analysis, three planets can be added to the catalogue of potentially habitable worlds: HIP~67537~b, HD~148156~b, and HD~106720~b. In addition, the changed parameterisation of BD~+49~898 means that its planet, BD~+49~898~b, now receives an incident flux that places it outside the optimistic habitable zone region, as defined by \citep{Kopparapu2013,Kopparapu2014}. We find that use of the new \textit{Gaia} data…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Gamma-ray bursts and supernovae
