66 citations · 452 across the 22 of their papers we have counts for
22 papers
SPHEREx: Aromatics, Aliphatics and PAH Size across the Iris Nebula
Christiaan Boersma, Alexandros Maragkoudakis, Louis J. Allamandola +4
Observations by the SpectroPhotometer for the History of the Universe, Epoch of Reionization, and Ices Explorer (SPHEREx) are combined with Spitzer spectral map data to study the a…
The High-Resolution Far- to Near-Infrared Anharmonic Absorption Spectra of Cyano-Substituted Polycyclic Aromatic Hydrocarbons from 300-6200 cm
Vincent J. Esposito, Ryan C. Fortenberry, Christiaan Boersma +1
Cyano-substituted polycyclic aromatic hydrocarbons (CN-PAHs) may contribute to the emission detected in the 7 - 9 m (1430 - 1100 cm) and 11 - 15 m (900 - 670 cm…
A Possible Additional Formation Pathway for the Interstellar Diatomic SiS
Ryan C. Fortenberry, Brett A. McGuire
The formation of silicon monosulfide (SiS) in space appears to be a difficult process, but the present work is showing that a previously excluded pathway may contribute to its astr…
The Infrared Absorption Spectrum of Phenylacetylene and its Deuterated Isotopologue in the Mid- to Far-IR
Vincent J. Esposito, Piero Ferrari, Wybren Jan Buma +4
Anharmonicity strongly influences the absorption and emission spectra of polycyclic aromatic hydrocarbon (PAH) molecules. Here, IR-UV ion-dip spectroscopy experiments together with…
Accurate ab initio spectroscopic studies of promising interstellar ethanolamine iminic precursors
D. Alberton, N. Inostroza-Pino, Ryan C. Fortenberry +4
Context. The detection of NH2CH2CH2OH (ethanolamine) in molecular cloud G+0.693-0.027 adds an additional player to the prebiotic molecules discovered so far in the interstellar med…
Towards the IR Detection of Carbonic Acid: Absorption and Emission Spectra
Ryan C. Fortenberry, Vincent J. Esposito
With the recent radioastronomical detection of cis-trans-carbonic acid (HCO) in a molecular cloud toward the galactic center, the more stable but currently unobserved cis-c…
Reaction Pathway and Rovibrational Analysis of Aluminum Nitride Species as Potential Dust Grain Nucleation Agents
C. Zachary Palmer, Ryan C. Fortenberry
A dust nucleating agent may be present in interstellar or circumstellar media that has gone seemingly undetected and unstudied for decades. Some analyses of the Murchison CM2 meteo…
JWST: Deuterated PAHs, PAH-nitriles, and PAH Overtone and Combination Bands I: Program Description and First Look
C. Boersma, L. J. Allamandola, V. J. Esposito +6
A first look is taken at the NIRSpec 1-5 m observations from JWST program 1591 that targets 7 objects along the low-mass stellar life cycle with PAH emission. Spectra extracted…
The mid-infrared molecular inventory towards Orion IRc2
Sarah Nickerson, Naseem Rangwala, Sean W. J. Colgan +8
We present the first high spectral resolution mid-infrared survey in the Orion BN/KL region, covering 7.2 to 28.3 micron. With SOFIA/EXES we target the enigmatic source Orion IRc2.…
Vibrational and Rotational Spectral Data for Possible Interstellar Detection of AlHOH, SiHOH, and SiHNH
A. G. Watrous, B. R. Westbrook, M. C. Davis +1
This work provides the first full set of vibrational and rotational spectral data needed to aid in the detection of AlHOH, SiHOH, and SiHNH in astrophysical or…
Knowledge Gaps in the Cometary Spectra of Oxygen-Bearing Molecular Cations
Ryan Fortenberry, Dennis Bodewits, Donna Pierce
Molecular cations are present in various astronomical environments, most notably in cometary atmospheres and tails where sunlight produces exceptionally bright near-UV to visible t…
The First Mid-Infrared Detection of HNC in the Interstellar Medium: Probing the Extreme Environment Towards the Orion Hot Core
Sarah Nickerson, Naseem Rangwala, Sean Colgan +7
We present the first mid-infrared (MIR) detections of HNC and H13CN in the interstellar medium, and numerous, resolved HCN rovibrational transitions. Our observations span 12.8 to…
The Fundamental Vibrational Frequencies and Spectroscopic Constants of the Dicyanoamine Anion, NCNCN (CN): Quantum Chemical Analysis for Astrophysical and Planetary Environments
David Dubois, Ella Sciamma-O'Brien, Ryan Fortenberry
Detecting anions in space has relied on a strong collaboration between theoretical and laboratory analyses to measure rotational spectra and spectroscopic constants to high accurac…
Gas-Phase Spectra of MgO Molecules: A Possible Connection from Gas-Phase Molecules to Planet Formation
Katherine A. Kloska, Ryan C. Fortenberry
A more fine-tuned method for probing planet-forming regions, such as protoplanetary discs, could be rovibrational molecular spectroscopy observation of particular premineral molecu…
The Interstellar Formation and Spectra of the Noble Gas, Proton-Bound HeHHe+, HeHNe+, & HeHAr+ Complexes
Cody J. Stephan, Ryan C. Fortenberry
The sheer interstellar abundance of helium makes any bound molecules or complexes containing it of potential interest for astrophysical observation. This work utilizes high-level a…
Electronic and Rovibrational Quantum Chemical Analysis of CP: The Next Interstellar Anion?
Ryan C. Fortenberry, Joseph A. Lukemire
CP is analogous to the known interstellar anion CN with phosphorus replacing the nitrogen in a simple step down the periodic table. In this work, it is shown that C…
ArH2+ and NeH2+ as Global Minima in the Ar+/Ne+ + H2 Reactions: Energetic, Spectroscopic, and Structural Data
Riley A. Theis, W. James Morgan, Ryan C. Fortenberry
In light of the recent discovery of ArH+ in the Crab nebula, it is shown through high-level quantum chemical comptuations that the global minima on the Ar+/Ne+ + H2 potential energ…
Theoretical Electronic and Rovibrational Studies for Anions of Interest to the DIBs
Ryan C. Fortenberry
The dipole-bound excited state of the methylene nitrile anion (CH2CN-) has been suggested as a candidate carrier for a diffuse interstellar band (DIB) at 803.8 nm. Its correspondin…
Singlet Excited States of Anions with Higher Main Group Elements
Ryan C. Fortenberry
Previous studies have shown that dipole-bound excited states exist for certain small anions. However, valence excited states have been reported for some closed-shell anions, but th…
High-Accuracy Quartic Force Field Calculations for the Spectroscopic Constants and Vibrational Frequencies of 1 ^1A' l-C3H-: A Possible Link to Lines Observed in the Horsehead Nebula PDR
Ryan C. Fortenberry, Xinchuan Huang, T. Daniel Crawford +1
It has been shown that rotational lines observed in the Horsehead nebula PDR are probably not caused by l-C3H+, as was originally suggested. In the search for viable alternative ca…
The Possible Interstellar Anion CH2CN-: Spectroscopic Constants, Vibrational Frequencies, and Other Considerations
Ryan C. Fortenberry, T. Daniel Crawford, Timothy J. Lee
It is hypothesized that the A ^1B_1 <- X ^1A' excitation into the dipole-bound state of the cyanomethyl anion (CH2CN-) is proposed as the carrier for one diffuse interstellar band.…
Spectroscopic Constants and Vibrational Frequencies for l-C3H+ and Isotopologues from Highly-Accurate Quartic Force Fields: The Detection of l-C3H+ in the Horsehead Nebula PDR Questioned
Xinchuan Huang, Ryan C. Fortenberry, Timothy J. Lee
Very recently, molecular rotational transitions observed in the photon-dominated region of the Horsehead nebula have been attributed to l-C3H+. In an effort to corroborate this fin…