Publications (19)
A three-phase approach to grain surface chemistry in protoplanetary disks: Gas, ice surfaces and ice mantles of dust grains
Maxime Ruaud, Uma Gorti
We study the effects of grain surface reactions on the chemistry of protoplanetary disks where gas, ice surface layers and icy mantles of dust grains are considered as three distin…
DiskMINT: Self-Consistent Thermochemical Disk Models with Radially Varying Gas and Dust -- Application to the Massive, CO-Rich Disk of IM Lup
Dingshan Deng, Uma Gorti, Ilaria Pascucci +1
Disks around young stars are the birthplaces of planets, and the spatial distribution of their gas and dust masses is critical for understanding where and what types of planets can…
CO emission as an effective measure of gas masses of protoplanetary disks
Maxime Ruaud, Uma Gorti, David Hollenbach
Many astrochemical models of observed CO isotopologue line emission, earlier considered a good proxy measure of H and hence disk gas mass, favor large deviations in the carbon…
Physical conditions in the central molecular zone inferred by H3+
Franck Le Petit, Maxime Ruaud, Emeric Bron +4
The H3+ molecule has been detected in many lines of sight within the central molecular zone (CMZ) with exceptionally large column densities and unusual excitation properties compar…
Ionized carbon around IRC +10216
William T. Reach, Maxime Ruaud, Helmut Wiesemeyer +5
Asymptotic giant branch (AGB)stars create a rich inventory of molecules in their envelopes as they lose mass during later stages of their evolution. These molecules cannot survive…
DiskMINT: A Tool to Estimate Disk Masses with CO Isotopologues
Dingshan Deng, Maxime Ruaud, Uma Gorti +1
CO is one of the most abundant molecules in protoplanetary disks, and optically thin emission from its isotopologues has been detected in many of them. However, several past works…
H2 ro-vibrational excitation in protoplanetary disks and its effects on the chemistry
Maxime Ruaud
The effect of H ro-vibrational excitation on the chemistry of protoplanetary disks is studied using a framework that solves for the disk physical and chemical structure and inc…
Class I/II Jets with JWST: Mass loss rates, Asymmetries, and Binary induced Wigglings
Naman S. Bajaj, Ilaria Pascucci, Tracy L. Beck +11
We present JWST NIRSpec spectro-imaging observations of jets from four edge-on protoplanetary disks that exhibit clear signatures of MHD disk winds. Bipolar jets are detected and s…
DiskMINT-GARDEN: Self-consistent Models to Estimate Disk Masses
Dingshan Deng, Uma Gorti, Ilaria Pascucci +1
We present DiskMINT-GARDEN, a grid of self-consistent models together with a fast, open source inference tool for disk masses. The grid is built on DiskMINT, a tool which couples h…
Ammonium salt formation and abundance in protoplanetary disks
Maxime Ruaud, Jean-Christophe Loison, Uma Gorti
Ammonium salts may represent an important reservoir of volatile species in Solar system primitive bodies, but the question of how and when these salts can form during the star form…
Cold water emission cannot be used to infer depletion of bulk elemental oxygen [O/H] in disks
Maxime Ruaud, Uma Gorti
We re-examine the constraints provided by Herschel Space Observatory data regarding cold water emission from protoplanetary disks. Previous disk models that were used to interpret…
Large Myr-old Disks are Not Severely Depleted of gas-phase CO or carbon
Ilaria Pascucci, Bennett N. Skinner, Dingshan Deng +6
We present an ACA search for [CI] emission at 492GHz toward large T Tauri disks (gas radii au) in the Myr-old Lupus star-forming region. Combined with ALMA 1…
Methyl isocyanate CH3NCO: An important missing organic in current astrochemical networks
Liton Majumdar, Jean-Christophe Loison, Maxime Ruaud +3
Methyl isocyanate (CH3NCO) is one of the important complex organic molecules detected on the comet 67P/Churyumov-Gerasimenko by Rosetta's Philae lander. It was also detected in hot…
A new study of the chemical structure of the Horsehead nebula: the influence of grain-surface chemistry
Romane Le Gal, Eric Herbst, Gwenaelle Dufour +4
A wide variety of molecules have recently been detected in the Horsehead nebula photodissociation region (PDR) suggesting that: (i) gas-phase and grain chemistries should both cont…
JWST/NIRSpec Reveals the Nested Morphology of Disk Winds from Young Stars
Ilaria Pascucci, Tracy L. Beck, Sylvie Cabrit +15
Radially extended disk winds could be the key to unlocking how protoplanetary disks accrete and how planets form and migrate. A distinctive characteristic is their nested morpholog…
On the reservoir of sulphur in dark clouds : chemistry and elemental abundance reconciled
Thomas H. G. Vidal, Jean-Christophe Loison, Adam Yassin Jaziri +3
Sulphur-bearing species are often used to probe the physical structure of star forming regions of the interstellar medium, but the chemistry of sulphur in these regions is still po…
Gas and grain chemical composition in cold cores as predicted by the Nautilus 3-phase model
Maxime Ruaud, Valentine Wakelam, Franck Hersant
We present an extended version of the 2-phase gas-grain code NAUTILUS to the 3-phase modelling of gas and grain chemistry of cold cores. In this model, both the mantle and the surf…
The ALMA Survey of Gas Evolution of PROtoplanetary Disks (AGE-PRO): III. Dust and Gas Disk Properties in the Lupus Star-forming Region
Dingshan Deng, Miguel Vioque, Ilaria Pascucci +20
We present Band 6 and Band 7 observations of 10 Lupus disks around M3-K6 stars from the ALMA survey of Gas Evolution in PROtoplanetary disks (AGE-PRO) Large Program. In addition to…
Chemistry in the GG Tau A Disk: Constraints from H2D+, N2H+, and DCO+ High Angular Resolution ALMA Observations
Parashmoni Kashyap, Liton Majumdar, Anne Dutrey +17
Resolved molecular line observations are essential for gaining insight into the physical and chemical structure of protoplanetary disks, particularly in cold, dense regions where p…