TOI-776 Archives - Astrobiology

Masses and radii of well-constrained small planets (0.2 ≤ Mp ≤ 30 M⊕). This catalog is a subset of the NASA Exoplanet Archive showing planets with consistently measured masses (RV or TTV) and measured radii (transit). The points are color-coded by composition: On the left, as bulk water mass fraction (Aguichine et al. 2021) and on the right, as bulk H2/He mass fraction (Lopez & Fortney 2014). Composition lines are shown for an equilibrium temperature of 500 K; rocky and Earth-like predictions are from Zeng et al. (2016). Bold and labeled circle symbols show planets with published JWST transmission spectra, and bold and labeled star symbols show other published COMPASS targets. TOI-776 c (the subject of this paper) is shown in larger font/symbol. -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

JWST COMPASS: NIRSpec/G395H Transmission Observations of TOI-776 c, a 2 Rearth [Earth radius] M Dwarf Planet

by Keith CowingMarch 4, 2025March 4, 2025

The atmospheres of planets between the size of Earth and Neptune at short orbital periods have been under intense scrutiny.