140 citations · 878 across the 19 of their papers we have counts for
19 papers
PDRs4All IV. An embarrassment of riches: Aromatic infrared bands in the Orion Bar
Ryan Chown, Ameek Sidhu, Els Peeters +136
(Abridged) Mid-infrared observations of photodissociation regions (PDRs) are dominated by strong emission features called aromatic infrared bands (AIBs). The most prominent AIBs ar…
Molecules with ALMA at Planet-forming Scales (MAPS). A Circumplanetary Disk Candidate in Molecular Line Emission in the AS 209 Disk
Jaehan Bae, Richard Teague, Sean M. Andrews +29
We report the discovery of a circumplanetary disk (CPD) candidate embedded in the circumstellar disk of the T Tauri star AS 209 at a radial distance of about 200 au (on-sky separat…
HS observations in young stellar disks in Taurus
P. Rivière-Marichalar, A. Fuente, R. Le Gal +7
Context. Studying gas chemistry in protoplanetary disks is key to understanding the process of planet formation. Sulfur chemistry in particular is poorly understood in interstellar…
Chemical compositions of five Planck cold clumps
V. Wakelam, P. Gratier, M. Ruaud +4
Aims: Interstellar molecules form early in the evolutionary sequence of interstellar material that eventually forms stars and planets. To understand this evolutionary sequence, it…
Gas-phase Elemental abundances in Molecular cloudS (GEMS) III. Unlocking the CS chemistry: the CS+O reaction
N. Bulut, O. Roncero, A. Aguado +36
CS is among the most abundant gas-phase S-bearing molecules in cold dark molecular clouds. It is easily observable with several transitions in the millimeter wavelength range, and…
Visualizing the Kinematics of Planet Formation
Disk Dynamics Collaboration, Philip J. Armitage, Jaehan Bae +23
A stunning range of substructures in the dust of protoplanetary disks is routinely observed across a range of wavelengths. These gaps, rings and spirals are highly indicative of a…
A Prospective ISRO-CfA Himalayan Sub-millimeter-wave Observatory Initiative
T. K. Sridharan, Shmuel Bialy, Raymond Blundell +20
The Smithsonian Astrophysical Observatory (SAO), a member of the Center for Astrophysics | Harvard and Smithsonian, is in discussions with the Space Applications Centre (SAC) of th…
A 3mm chemical exploration of small organics in Class I YSOs
Romane Le Gal, Karin I. Öberg, Jane Huang +8
There is mounting evidence that the composition and structure of planetary systems are intimately linked to their birth environments. During the past decade, several spectral surve…
Gas phase Elemental abundances in Molecular cloudS (GEMS). II. On the quest for the sulphur reservoir in molecular clouds: the case
D. Navarro-Almaida, R. Le Gal, A. Fuente +30
Sulphur is one of the most abundant elements in the Universe. Surprisingly, sulphuretted molecules are not as abundant as expected in the interstellar medium, and the identity of t…
An ALMA Survey of HCO in Protoplanetary Disks
Jamila Pegues, Karin I. Öberg, Jennifer B. Bergner +13
HCO is one of the most abundant organic molecules in protoplanetary disks and can serve as a precursor to more complex organic chemistry. We present an ALMA survey of HCO t…
Abundances of sulphur molecules in the Horsehead nebula. First NS+ detection in a photodissociation region
P. Rivière-Marichalar, A. Fuente, J. R. Goicoechea +8
Aims. Our goal is to complete the inventory of S-bearing molecules and their abundances in the prototypical photodissociation region (PDR) the Horsehead nebula to gain insight into…
Modeling C-Shock Chemistry in Isolated Molecular Outflows
Andrew M. Burkhardt, Christopher N. Shingledecker, Romane Le Gal +3
Shocks are a crucial probe for understanding the ongoing chemistry within ices on interstellar dust grains where many complex organic molecules (COMs) are believed to be formed. Ho…
Efficient methanol production on the dark side of a prestellar core
Jorma Harju, Jaime E. Pineda, Anton I. Vasyunin +23
We present ALMA maps of the starless molecular cloud core Ophiuchus/H-MM1 in the lines of deuterated ammonia (ortho-NH2D), methanol (CH3OH), and sulphur monoxide (SO). The dense co…
Astrochemical Kinetic Grid Models of Groups of Observed Molecular Abundances: Taurus Molecular Cloud 1 (TMC-1)
Dominique M. Maffucci, Trey V. Wenger, Romane Le Gal +1
The emission line spectra of cyanoacetylene and methanol reveal chemical and physical heterogeneity on very small (< 0.1 pc) scales toward the peak in cyanopolyyne emission in the…
H2CO ortho-to-para ratio in the protoplanetary disk HD 163296
V. V. Guzman, K. I. Oberg, J. Carpenter +3
Ortho-to-para (o/p) ratios of species like water, ammonia and formaldehyde (H2CO) are believed to encode information about the formation history of the molecule. Measurements of o/…
Sulphur chemistry in the L1544 pre-stellar core
Charlotte Vastel, David Quénard, Romane Le Gal +7
The L1544 pre-stellar core has been observed as part of the ASAI IRAM 30m Large Program as well as follow-up programs. These observations have revealed the chemical richness of the…
On Cosmic Ray-Driven Grain Chemistry in Cold Core Models
Christopher N. Shingledecker, Jessica D. Tennis, Romane Le Gal +1
In this paper, we present preliminary results illustrating the effect of cosmic rays on solid-phase chemistry in models of both TMC-1 and several sources with physical conditions i…
The ortho-to-para ratio of HCl: Quasi-classical trajectory calculations and new simulations in light of new observations
Romane Le Gal, Changjian Xie, Eric Herbst +3
Multi-hydrogenated species with proper symmetry properties can present different spin configurations, and thus exist under different spin symmetry forms, labeled as para and ortho…
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…