Habitability and biosignatures of Hycean worlds

N Madhusudhan, AAA Piette… - The Astrophysical …, 2021 - iopscience.iop.org
We investigate a new class of habitable planets composed of water-rich interiors with
massive oceans underlying H 2-rich atmospheres, referred to here as Hycean worlds. With …

The 10 parsec sample in the Gaia era

C Reylé, K Jardine, P Fouqué, JA Caballero… - Astronomy & …, 2021 - aanda.org
Context. The nearest stars provide a fundamental constraint for our understanding of stellar
physics and the Galaxy. The nearby sample serves as an anchor where all objects can be …

The occurrence rate of terrestrial planets orbiting nearby mid-to-late M dwarfs from TESS Sectors 1–42

K Ment, D Charbonneau - The Astronomical Journal, 2023 - iopscience.iop.org
We present an analysis of a volume-complete sample of 363 mid-to-late M dwarfs within 15
pc of the Sun with masses between 0.1 and 0.3 M⊙ observed by TESS within sectors 1–42 …

The first habitable-zone Earth-sized planet from TESS. I. Validation of the TOI-700 system

EA Gilbert, T Barclay, JE Schlieder… - The Astronomical …, 2020 - iopscience.iop.org
We present the discovery and validation of a three-planet system orbiting the nearby (31.1
pc) M2 dwarf star TOI-700 (TIC 150428135). TOI-700 lies in the TESS continuous viewing …

Flare rates, rotation periods, and spectroscopic activity indicators of a volume-complete sample of mid-to late-M dwarfs within 15 pc

AA Medina, JG Winters, JM Irwin… - The Astrophysical …, 2020 - iopscience.iop.org
We present a study of flare rates, rotation periods, and spectroscopic activity indicators of
125 single stars within 15 parsecs and with masses between 0.1 and 0.3 M⊙ observed …

A pair of TESS planets spanning the radius valley around the nearby mid-M dwarf LTT 3780

R Cloutier, JD Eastman, JE Rodriguez… - The Astronomical …, 2020 - iopscience.iop.org
We present the confirmation of two new planets transiting the nearby mid-M dwarf LTT 3780
(TIC 36724087, TOI-732, V= 13.07, K s= 8.204, R s= 0.374 R⊙, M s= 0.401 M⊙, d= 22 pc) …

The Initial Mass Function Based on the Full-sky 20 pc Census of∼ 3600 Stars and Brown Dwarfs

JD Kirkpatrick, F Marocco, CR Gelino… - The Astrophysical …, 2024 - iopscience.iop.org
A complete accounting of nearby objects—from the highest-mass white dwarf progenitors
down to low-mass brown dwarfs—is now possible, thanks to an almost complete set of …

[HTML][HTML] TOI-1452 b: SPIRou and TESS reveal a super-Earth in a temperate orbit transiting an M4 dwarf

C Cadieux, R Doyon, M Plotnykov… - The Astronomical …, 2022 - iopscience.iop.org
Exploring the properties of exoplanets near or inside the radius valley provides insight on
the transition from the rocky super-Earths to the larger, hydrogen-rich atmosphere mini …

Mid-to-late M Dwarfs Lack Jupiter Analogs

EK Pass, JG Winters, D Charbonneau… - The Astronomical …, 2023 - iopscience.iop.org
Cold Jovian planets play an important role in sculpting the dynamical environment in which
inner terrestrial planets form. The core accretion model predicts that giant planets cannot …

Analysis of a JWST NIRSpec lab time series: characterizing systematics, recovering exoplanet transit spectroscopy, and constraining a noise floor

Z Rustamkulov, DK Sing, R Liu… - The Astrophysical Journal …, 2022 - iopscience.iop.org
Abstract The James Webb Space Telescope's (JWST) NIRSpec instrument will unveil the
nature of exoplanet atmospheres across the wealth of planet types, from temperate …