The search for the simplest amino acid, glycine (NH2CH2COOH), in the interstellar medium (ISM), has become a never-ending story for astrochemistry and astrophysics researchers because that molecule plays a possible […]
dust grains
Posted inAstronomy & Telescopes, Beta Pictoris, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
JWST-TST High Contrast: Asymmetries, Dust Populations And Hints Of A Collision In The β Pictoris Disk With NIRCam And MIRI
We present the first JWST MIRI and NIRCam observations of the prominent debris disk around Beta Pictoris. Coronagraphic observations in 8 filters spanning from 1.8 to 23~μm provide an unprecedentedly […]
Posted inAstrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Comets and Asteroids, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Interstellar, Status Report
Experimental Study Of The Binding Energy Of NH3 On Different Types Of Ice And Its Impact On The Snow Line Of NH3 And H2O
N-bearing molecules (like N2H+ or NH3) are excellent tracers of high-density, low-temperature regions like dense cloud cores and could shed light into snowlines in protoplanetary disks and the chemical evolution […]
Posted inAstrochemistry, Astrogeology, Exoplanets, -moons, -comets, Status Report
Effects of Dust Grain Size Distribution on the Abundances of CO and H2 in Galaxy Evolution
We model the effect of grain size distribution in a galaxy on the evolution of CO and H2 abundances. The formation and dissociation of CO and H2 in typical dense […]
Posted inAstrochemistry, Astronomy & Telescopes, Interstellar, Status Report
Resonant Infrared Irradiation Of CO And CH3OH Interstellar Ices
Solid-phase photo-processes involving icy dust grains greatly affect the chemical evolution of the interstellar medium by leading to the formation of complex organic molecules and by inducing photodesorption.
Posted inAstrochemistry, Astrogeology, Imaging & Spectroscopy, Interstellar, Status Report
Carbonaceous Dust Grains Within Galaxies Seen In The First Billion Years Of Cosmic Time
Interstellar dust captures a significant fraction of elements heavier than helium in the solid state and is an indispensable component both in theory and observations of galaxy evolution.
Posted inAstrochemistry, Astronomy & Telescopes, Imaging & Spectroscopy, Press Release
PHANGS-JWST First Results: Variations in PAH Fraction as a Function of ISM Phase and Metallicity
We present maps tracing the fraction of dust in the form of polycyclic aromatic hydrocarbons (PAHs) in IC 5332, NGC 628, NGC 1365, and NGC 7496 from JWST/MIRI observations.