TOI-654 b Archives

The transmission spectra of TOI-2136b, TOI-1634b, TOI-654b, and LP791-18c around the near-infrared helium triplet.

A Search for Helium in the Atmospheres of Three Sub-Neptunes and a Super-Earth Around M-dwarfs

by Keith CowingAugust 21, 2026August 21, 2026

[astro-ph.EP] Thousands of sub-Neptunes have been discovered mainly through space-based surveys such as Kepler and TESS. Their bulk compositions and internal structures are thought to reflect their formation and evolutionary […]

Multicolor simultaneous light curves in g-, r-, i-, and zs-bands, obtained by MuSCAT2 on 2021 March 19 (Top) and MuSCAT3 on 2021 January 28 (Bottom) (Section 2.2 and 2.3). The data are jointly fitted with the transit model (blue, green, orange, and red) and baseline model, and the data are subtracted with the baseline models (gray). Alt text: Time-series flux for the transits of the MuSCAT2 and MuSCAT3 data in g-, r-, i-, and zs-bands, and the optimum models for each. -- astro-ph.EP

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

The Mass Of TOI-654 b: A Short-period Sub-Neptune Transiting A Mid-M Dwarf

by Keith CowingJuly 23, 2025July 23, 2025

Sub-Neptunes are small planets between the size of the Earth and Neptune. The orbital and bulk properties of transiting sub-Neptunes can provide clues for their formation and evolution of small […]