114 citations · 483 across the 20 of their papers we have counts for
20 papers
CO and N2 Produced from H2O, CO2, and NH3 Cometary Ice Analogs
Alexandra McKinnon, Alexia Simon, Michelle R. Brann +3
Hypervolatile species such as carbon monoxide (CO) and molecular nitrogen (N2) have been detected in comets, and could be used to constrain comet formation temperature conditions i…
Functionalization of Benzene Ices by Atomic Oxygen
Elettra L. Piacentino, Alexandra McKinnon, Nora Hänni +6
Small aromatic molecules, including functionalized derivatives of benzene, are known to be present throughout the different stages of star and planet formation. In particular, oxyg…
The survival of aromatic molecules in protoplanetary disks
Elettra L. Piacentino, Aurelia Balkanski, Jenny Calahan +3
Aromaticity is a common chemical functionalities in bioactive molecules. In interstellar and circumstellar environments benzene and other small aromatics are considered the precurs…
Methyl Isocyanate Formation from Oxygen Insertion in Methyl Cyanide Ices
Michelle R. Brann, Karin I. Öberg, Mahesh Rajappan
In cold molecular clouds, UV photolysis of icy grain mantles generates radicals that lead to new molecule formation. When radical diffusion is limited by low temperatures, oxygen a…
H2S ice sublimation dynamics: experimentally constrained binding energies, entrapment efficiencies, and snowlines
Julia C. Santos, Elettra L. Piacentino, Jennifer B. Bergner +2
Hydrogen sulfide (H2S) is thought to be an important sulfur reservoir in interstellar ices. It serves as a key precursor to complex sulfur-bearing organics, and has been proposed t…
Thermal Desorption Kinetics, Binding Energies, and Entrapment of Methyl Mercaptan Ices
Suchitra Narayanan, Elettra L. Piacentino, Karin I. Öberg +1
Organosulfur species are potential major carriers of sulfur in the interstellar medium, as well as interesting ingredients in prebiotic chemistry. The most fundamental question reg…
Ice origins of OCS and chemistry of CS2-bearing ice mantles
Rafael Martin-Domenech, Karin I. Öberg, Guillermo M. Muñoz Caro +3
Understanding the formation of carbonyl sulfide (OCS) in interstellar ices is key to constrain the sulfur chemistry in the interstellar medium (ISM), since it is the only ice S-bea…
Characterization of monosubstituted benzene ices
Elettra L. Piacentino, Aurelia Balkanski, Mahesh Rajappan +1
Aromatic structures are fundamental for key biological molecules such as RNA and metabolites and the abundances of aromatic molecules on young planets are therefore of high interes…
Organic chemistry in the H2-bearing, CO-rich interstellar ice layer at temperatures relevant to dense cloud interiors
Rafael Martín-Doménech, Alexander DelFranco, Karin I. Öberg +1
Ice chemistry in the dense, cold interstellar medium (ISM) is probably responsible for the formation of interstellar complex organic molecules (COMs). Recent laboratory experiments…
Formation of c-C6H5CN ice using the SPACE TIGER experimental setup
Pavlo Maksyutenko, Rafael Martin-Domenech, Elettra Piacentino +2
Benzonitrile (c-C6H5CN) has been recently detected in cold and dense regions of the interstellar medium (ISM), where it has been used as a signpost of a rich aromatic organic chemi…
HCN snowlines in protoplanetary disks: constraints from ice desorption experiments
Jennifer B. Bergner, Mahesh Rajappan, Karin I. Oberg
HCN is among the most commonly detected molecules in star- and planet-forming regions. It is of broad interest as a tracer of star-formation physics, a probe of nitrogen astrochemi…
Exploring the chemistry induced by energetic processing of the H2-bearing, CO-rich apolar ice layer
Rafael Martin-Domenech, Pavlo Maksiutenko, Karin I. Oberg +1
Interstellar ice mantles on the surfaces of dust grains are thought to have a bi-layered structure, with a H2O-rich polar layer, covered by a CO-rich apolar layer that probably har…
Formation of NH2CHO and CH3CHO upon UV photoprocessing of interstellar ice analogs
Rafael Martin-Domenech, Karin I. Oberg, Mahesh Rajappan
Complex organic molecules (COMs) can be produced by energetic processing of interstellar ice mantles accreted on top of dust grains. Two COMs with proposed energetic ice formation…
Entrapment of CO in CO2 ice
Alexia Simon, Karin I. Oberg, Mahesh Rajappan +1
Planet atmosphere and hydrosphere compositions are fundamentally set by accretion of volatiles, and therefore by the division of volatiles between gas and solids in planet-forming…
Oxygen atom reactions with C2H6, C2H4, and C2H2 in ices
Jennifer B. Bergner, Karin I. Oberg, Mahesh Rajappan
Oxygen atom addition and insertion reactions may provide a pathway to chemical complexity in ices that are too cold for radicals to diffuse and react. We have studied the ice-phase…
Desorption Kinetics and Binding Energies of Small Hydrocarbons
Aida Behmard, Edith C. Fayolle, Dawn M. Graninger +5
Small hydrocarbons are an important organic reservoir in protostellar and protoplanetary environments. Constraints on desorption temperatures and binding energies of such hydrocarb…
Methanol formation via oxygen insertion chemistry in ice
Jennifer B. Bergner, Karin I. Oberg, Mahesh Rajappan
We present experimental constraints on the insertion of oxygen atoms into methane to form methanol in astrophysical ice analogs. In gas-phase and theoretical studies this process h…
Kinetics and mechanisms of the acid-base reaction between NH and HCOOH in interstellar ice analogs
Jennifer B. Bergner, Karin I. Oberg, Mahesh Rajappan +1
Interstellar complex organic molecules (COMs) are commonly observed during star formation, and are proposed to form through radical chemistry in icy grain mantles. Reactions betwee…
CO and N desorption energies from water ice
Edith C. Fayolle, Jodi Balfe, Ryan Loomis +4
The relative desorption energies of CO and N are key to interpretations of observed interstellar CO and N abundance patterns, including the well-documented CO and NH$^+…
CO diffusion into amorphous H2O ices
Trish Lauck, Leendertjan Karssemeijer, Katherine Shulenberger +3
The mobility of atoms, molecules and radicals in icy grain mantles regulate ice restructuring, desorption, and chemistry in astrophysical environments. Interstellar ices are domina…