SPECULOOS-2 Archives

EWs for the K i lines in the J band vs. NIR spectral type for M dwarfs in our sample. The figure elements are the same as in Figure 3. The panels display: (a) NIR spectral type vs. K i 1.169 µm EW, (b) NIR spectral type vs. K i 1.177 µm EW, and (c) NIR spectral type vs. K i 1.253 µm EW. -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release, Space Weather & Heliophysics

Gravity-sensitive Spectral Indices In Ultracool Dwarfs: Investigating Correlations With Metallicity And Planet Occurrence Using SpeX and FIRE Observations

by Keith CowingJune 30, 2025June 28, 2025

We present a near-infrared spectroscopic analysis (0.9-2.4 micron) of gravity indices for 57 ultracool dwarfs (spectral types M5.5 to L0), including exoplanet hosts TRAPPIST-1, SPECULOOS-2, SPECULOOS-3, and LHS 3154. Our […]

Evolution of LP 890-9’s HZ for 10% of the 1000 trials. The pale blue curves correspond to the “early Mars” limit, dark blue to “maximum greenhouse,” orange to “runaway greenhouse” and red to “recent Venus” (Kopparapu et al. 2013). Thin curves represent individual trials, while the thick line is the average. The current orbits of planets b and c, assuming the best fit stellar mass, are shown with dashed black lines. -- astro-ph.EP

Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report, Water/Hycean Worlds & Oceanography

History and Habitability of the LP 890-9 Planetary System

by Keith CowingDecember 5, 2024

We present numerous aspects of the evolution of the LP 890-9 (SPECULOOS-2/TOI-4306) planetary system, focusing on the likelihood that planet c can support life.

Astronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Press Release, TRAPPIST-1

The Search for Habitable, Earth-Sized Planets around SPECULOOS-2

by Keith CowingDecember 28, 2022December 28, 2022

In a new paper, NASA-supported scientists have predicted that there is an Earth-sized planet in the habitable zone of the star SPECULOOS-2.

Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Press Release

Two Temperate Super-Earths Transiting A Nearby Late-type M Dwarf

by Keith CowingSeptember 7, 2022September 7, 2022

In the age of JWST, temperate terrestrial exoplanets transiting nearby late-type M dwarfs provide unique opportunities for characterising their atmospheres, as well as searching for biosignature gases. We report here […]

Exoplanets, -moons, -comets, Habitable Zones, Press Release, TRAPPIST-1

SPECULOOS Discovers A Potentially Habitable Super-Earth

by Keith CowingSeptember 7, 2022September 7, 2022

An international team of scientists, led by Laetitia Delrez, astrophysicist at the University of Liège (Belgium), has just announced the discovery of two ‘super-Earth’ type planets orbiting LP 890-9. Also […]