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19932026
Showing 2026 · astro-ph.SRShow all

6 papers · 2 filters

astro-ph.SR2026

SPIRITS 19q: Dust Production by a Subsolar-metallicity Carbon-rich Wolf-Rayet Star in NGC 2403

Sam Rose, Ryan M. Lau, Jacob E. Jencson +20

We present JWST/NIRSpec IFU observations of SPIRITS 19q, the highly dust-producing carbon-rich (WC) binary candidate located in a subsolar-metallicity region of the nearby spiral g…

astro-ph.SR2026

Silicate Clouds, SiO, and Molecular Trends across the L-T Sequence: A JWST/MIRI LRS Spectral Library of Brown Dwarfs

Sam Barber, Stanimir Metchev, Genaro Suárez +9

We present the results of a survey program with JWST's MIRI LRS that obtained 514 m R~100 spectra of twenty-three L0T6 dwarfs. This spectral type range spans the formation…

astro-ph.SR2026

Euclid: The convective-transition gap of 47 Tuc

M. Libralato, M. Griggio, R. Gerasimov +140

We report the first detection of the `convective-transition gap' (also known as `M-dwarf gap') in the globular cluster 47 Tuc (NGC 104) thanks to Euclid data. This feature, linked…

astro-ph.SR2026

The Impact of Radiation Environment on the Evolution and Fragmentation of Protostellar Discs

Matt T. Cusack, Paul C. Clark, Ken Rice +5

We present high-resolution zoom-in simulations of molecular clouds exposed to an interstellar radiation field and cosmic ray ionisation rate up to 1000 times stronger than that of…

astro-ph.SR2026★ 3 cited

Clouds with a silicate lining: Using JWST spectra to probe atmospheric diversity in young AB Dor L dwarfs

M. B. Lam, J. M. Vos, G. Suárez +13

We present the first full JWST NIRSpec Prism and MIRI LRS 0.6 - 14 m (R ~ 100) spectra and analysis of five ~ 133 Myr L dwarf members of the AB Doradus moving group and one prob…

astro-ph.SR2026★ 1 cited

Unlocking accretion rate diagnostics for high-mass protostars using JWST/MIRI HI lines

S. D. Reyes-Reyes, H. Beuther, E. F. van Dishoeck +14

While many aspects of high-mass star formation have been investigated, the accretion onto the central protostars is one of the most fundamental but less explored physical propertie…