JWST-MIRI/MRS Archives

The MIRI/MRS (this work), NIRspec/PRISM and NIRSpec/G395M Luhman et al. (2024) spectrum of WISE 0855 from 0.8 to 22 µm. Panel a) shows the NIRspec/PRISM data in red and panel from 0.8 to 2.2µm b) the NIRspec/G395M in green and MIRI/MRS data in blue from 2.2 to 22 µm. Insets c) and d) show the overlap between the three data sets from 3.5 to 5.4 µm and the ammonia feature from 8.0 to 13.0 µm, respectively. The most dominant absorbing species are presented above the spectrum in various colors. For better visualization he data was binned to a resolution of R = 1000 for MIRI/MRS and NIRSpec/G395M and R = 100 for NIRSpec/PRISM. -- astro-ph.EP

Astrochemistry, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

Water Depletion and 15NH3 in the Atmosphere of the Coldest Brown Dwarf Observed With JWST/MIRI

by Keith CowingOctober 17, 2024October 17, 2024

With a temperature of ∼285 K WISE0855 is the coldest brown dwarf observed so far. Using the James Webb Space Telescope (JWST) we obtained observations that allow us to characterize […]

JWST-MIRI/MRS spectrum of Sz28 labelling the detected molecular species and the dust features. The spectrum from Spitzer is depicted in grey. The red question mark (?) symbol depicts the unidentified spectral features and the red horizontal lines show their wavelength range. The Q-branch of the molecules are shown in solid lines along with their identified isotopologues, if any, in dotted lines. -- astro-ph.EP

Astrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Imaging & Spectroscopy, Status Report

MINDS. Hydrocarbons Detected By JWST/MIRI In The Inner Disk of Sz28 Consistent With A High C/O Gas-phase chemistry

by Keith CowingJuly 24, 2024

With the advent of JWST, we acquire unprecedented insights into the physical and chemical structure of the inner regions of planet-forming disks where terrestrial planet formation occurs.