153 citations · 944 across the 25 of their papers we have counts for
25 papers
The Molecular Inventory of TMC-1 with GOTHAM Observations
Ci Xue, Alex N. Byrne, Larry Morgan +14
Spectral line surveys of the Taurus Molecular Cloud-1 (TMC-1) have led to the detection of more than 100 new molecular species, making it the most prolific source of interstellar m…
Discovery of the 7-ring PAH Cyanocoronene (CHCN) in GOTHAM Observations of TMC-1
Gabi Wenzel, Siyuan Gong, Ci Xue +18
We present the synthesis and laboratory rotational spectroscopy of the 7-ring polycyclic aromatic hydrocarbon (PAH) cyanocoronene (CHCN) using a laser-ablation assist…
The Missing Link of Sulfur Chemistry in TMC-1: The Detection of c-C3H2S from the GOTHAM Survey
Anthony J. Remijan, P. Bryan Changala, Ci Xue +13
We present the spectroscopic characterization of cyclopropenethione (c-C3H2S) in the laboratory and detect it in space using the Green Bank Telescope (GBT) Observations of TMC-1: H…
Detections of interstellar 2-cyanopyrene and 4-cyanopyrene in TMC-1
Gabi Wenzel, Thomas H. Speak, P. Bryan Changala +19
Polycyclic aromatic hydrocarbons (PAHs) are among the most ubiquitous compounds in the universe, accounting for up to ~25% of all interstellar carbon. Since most unsubstituted PAHs…
Discovery of interstellar 1-cyanopyrene: a four-ring polycyclic aromatic hydrocarbon in TMC-1
Gabi Wenzel, Ilsa R. Cooke, P. Bryan Changala +22
Polycyclic aromatic hydrocarbons (PAHs) are expected to be the most abundant class of organic molecules in space. Their interstellar lifecycle is not well understood, and progress…
Constraining P and T Violating Forces with Chiral Molecules
C. Baruch, P. B. Changala, Y. Shagam +1
New sources of parity and time reversal violation are predicted by well motivated extensions of the Standard Model and can be effectively probed by precision spectroscopy of atoms…
Constraining CP violating nucleon-nucleon long range interactions in diatomic eEDM searches
Chaja Baruch, P. Bryan Changala, Yuval Shagam +1
The searches for CP violating effects in diatomic molecules, such as and ThO, are typically interpreted as a probe of the electron's electric dipole moment ($e\text{…
Ergodicity breaking in rapidly rotating C60 fullerenes
Lee R. Liu, Dina Rosenberg, P. Bryan Changala +5
Ergodicity, the central tenet of statistical mechanics, requires that an isolated system will explore all of its available phase space permitted by energetic and symmetry constrain…
Detection of Interstellar -1-cyano-1,3-butadiene in GOTHAM Observations of TMC-1
Ilsa R. Cooke, Ci Xue, P. Bryan Changala +12
We report the detection of the lowest energy conformer of -1-cyano-1,3-butadiene (-1-CHCN), a linear isomer of pyridine, using the fourth data reduction of the GOTHAM…
Astronomical Detection of the Interstellar Anion C10H- towards TMC-1 from the GOTHAM Large Program on the GBT
Anthony Remijan, Haley N. Scolati, Andrew M. Burkhardt +13
Using data from the GOTHAM (GBT Observations of TMC-1: Hunting for Aromatic Molecules) survey, we report the first astronomical detection of the C10H- anion. The astronomical obser…
Laboratory and astronomical discovery of magnesium dicarbide, MgC
P. B. Changala, H. Gupta, J. Cernicharo +6
We report the detection of magnesium dicarbide, MgC, in the laboratory at centimeter wavelengths and assign MgC, MgC, and MgC to 14 unidentifie…
Franck-Condon spectra of unbound and imaginary-frequency vibrations via correlation functions: a branch-cut free, numerically stable derivation
P. Bryan Changala, Nadav Genossar, Joshua H. Baraban
Molecular electronic spectra can be represented in the time domain as auto-correlation functions of the initial vibrational wavepacket. We present a derivation of the harmonic vibr…
Collision-induced C_60 rovibrational relaxation probed by state-resolved nonlinear spectroscopy
Lee R. Liu, P. Bryan Changala, Marissa L. Weichman +6
Quantum state-resolved spectroscopy was recently achieved for C60 molecules when cooled by buffer gas collisions and probed with a midinfrared frequency comb. This rovibrational qu…
A Search for Heterocycles in GOTHAM Observations of TMC-1
Timothy J. Barnum, Mark A. Siebert, Kin Long Kelvin Lee +9
We have conducted an extensive search for nitrogen-, oxygen- and sulfur-bearing heterocycles toward Taurus Molecular Cloud 1 (TMC-1) using the deep, broadband centimeter-wavelength…
Anomalous intensities in the infrared emission of CH explained by quantum nuclear motion and electric dipole calculations
P. Bryan Changala, David A. Neufeld, Benjamin Godard
The unusual infrared emission patterns of CH, recently detected in the planetary nebula NGC 7027, are examined theoretically with high-accuracy rovibrational wavefunctions and…
Ultra-sensitive multi-species spectroscopic breath analysis for real-time health monitoring and diagnostics
Qizhong Liang, Ya-Chu Chan, P. Bryan Changala +3
Breath analysis enables rapid, non-invasive diagnostics, as well as long-term monitoring, of human health through the identification and quantification of exhaled biomarkers. Here,…
Interstellar Detection of 2-Cyanocyclopentadiene, CHCN, a Second Five-Membered Ring Toward TMC-1
Kin Long Kelvin Lee, P. Bryan Changala, Ryan A. Loomis +6
Using radio observations with the Green Bank Telescope, evidence has now been found for a second five-membered ring in the dense cloud Taurus Molecular Cloud-1 (TMC-1). Based on ad…
Quantum state resolution of the C fullerene
P. Bryan Changala, Marissa L. Weichman, Kevin F. Lee +2
The remarkable physical properties of buckminsterfullerene, C, have attracted intense research activity since its original discovery. Total quantum state resolved measuremen…
Direct measurements of DOCO isomers in the kinetics of OD+CO
Thinh Q. Bui, Bryce J. Bjork, P. Bryan Changala +4
Quantitative and mechanistically-detailed kinetics of the reaction of hydroxyl radical (OH) with carbon monoxide (CO) have been a longstanding goal of contemporary chemical kinetic…
OD + CO -> D + CO2 Branching Kinetics Probed with Time-Resolved Frequency Comb Spectroscopy
Thinh Q. Bui, Bryce J. Bjork, P. Bryan Changala +3
Time-resolved direct frequency comb spectroscopy (TRFCS) was used to study the kinetics of the deuterated analogue of the OH+CO->H+CO2 reaction, which is important for atmospheric…
Three Photon Absorption in Optical Parametric Oscillators Based on OP-GaAs
Oliver H. Heckl, Bryce J. Bjork, Georg Winkler +9
We report on the first singly-resonant (SR), synchronously pumped optical parametric oscillator (OPO) based on orientation-patterned gallium arsenide (OP-GaAs). Together with a dou…
Ab initio effective rotational and rovibrational Hamiltonians for non-rigid systems via curvilinear second order vibrational Møller-Plesset perturbation theory
P. Bryan Changala, Joshua H. Baraban
We present a perturbative method for ab initio calculations of rotational and rovibrational effective Hamiltonians of both rigid and non-rigid molecules. Our approach is based on a…
Direct Frequency Comb Measurement of OD + CO -> DOCO Kinetics
Bryce J. Bjork, Thinh Q. Bui, Oliver H. Heckl +9
The kinetics of the OH + CO reaction, fundamental to both atmospheric and combustion chemistry, are complex due to the formation of the HOCO intermediate. Despite extensive studies…
Continuous probe of cold complex molecules with infrared frequency comb spectroscopy
Ben Spaun, P. Bryan Changala, David Patterson +4
Cavity-enhanced frequency comb spectroscopy for molecule detection in the mid-infrared powerfully combines high resolution, high sensitivity, and broad spectral coverage. However,…