524 citations · 1k across the 20 of their papers we have counts for
19 papers
Ultraviolet photoabsorption in the and band systems of SO sulphur isotopologues
A. N. Heays, G. Stark, J. R. Lyons +3
High-resolution far-ultraviolet broadband Fourier-transform photoabsorption spectra of , , , and…
Fourier-transform spectroscopy of CO and deperturbation analysis of the A ( = 0 - 3) levels
R. Hakalla, M. L. Niu, R. W. Field +9
The high-resolution B - A (0, 0) and (0, 3) emission bands of the less-abundant CO isotopologue have been investigated by Fourier-transform spectroscopy i…
Extraterrestrial Photochemistry: Principles and Applications
Christopher R. Arumainayagam, Eric Herbst, A. N. Heays +3
Energetic processing of interstellar ice mantles and planetary atmospheres via photochemistry is a critical mechanism in the extraterrestrial synthesis of prebiotic molecules. Phot…
The spin-forbidden vacuum-ultraviolet absorption spectrum of 14N15N
A. N. Heays, B. R. Lewis, N. de Oliveira +1
Photoabsorption spectra of were recorded at high resolution with a vacuum-ultraviolet Fourier-Transform spectrometer fed by synchrotron radiation in…
H2-Induced Pressure Broadening and Pressure Shift in the P-Branch of the v3 Band of CH4 from 300 to 700 K
Ehsan Gharib-Nezhad, Alan N. Heays, Hans A. Bechtel +1
For accurate modelling of observations of exoplanet atmospheres, quantification of the pressure broadening of infrared absorption lines for and by a variety of gases at elevated te…
Precision spectroscopy and comprehensive analysis of perturbations in the ) state of CO
R. Hakalla, T. M. Trivikram, A. N. Heays +4
We have reinvestigated the A level of CO\ using new high-resolution spectra obtained via multi-photon laser excitation as well as with synchrotron-based F…
Nitrogen isotope fractionation in protoplanetary disks
Ruud Visser, Simon Bruderer, Paolo Cazzoletti +3
Aims: The two stable isotopes of nitrogen, 14N and 15N, exhibit a range of abundance ratios both inside and outside the solar system. The elemental ratio in the solar neighborhood…
High-resolution one-photon absorption spectroscopy of the system of radical OH and OD
A. N. Heays, N. de Oliveira, B. Gans +6
Vacuum-ultraviolet (VUV) photoabsorption spectra were recorded of the , and $D\,{}^2Σ^-(v…
Non-thermal photons and direct photodissociation of H2, HD and HeH+ in the chemistry of the primordial Universe
C. M. Coppola, M. V. Kazandjian, D. Galli +2
Non-thermal photons deriving from radiative transitions among the internal ladder of atoms and molecules are an important source of photons in addition to thermal and stellar sourc…
Photodissociation and photoionisation of atoms and molecules of astrophysical interest
A. N. Heays, A. D. Bosman, E. F. van Dishoeck
A new collection of photodissociation and photoionisation cross sections for 102 atoms and molecules of astrochemical interest has been assembled, along with a brief review of the…
Spirals in protoplanetary disks from photon travel time
M. Kama, P. Pinilla, A. N. Heays
Spiral structures are a common feature in scattered-light images of protoplanetary disks, and of great interest as possible tracers of the presence of planets. However, other mecha…
Spectroscopy and perturbation analysis of the A(v=0) state of CO
M. L. Niu, R. Hakalla, T. Madhu Trivikram +4
The lowest level of the A, state of the CO isotopologue of carbon monoxide has been reinvestigated with a variety of high resolution spectroscopic techniqu…
Spectroscopy and perturbation analysis of the CO AX (2,0), (3,0) and (4,0) bands
M. L. Niu, E. J. Salumbides, A. N. Heays +3
The (2,0) (3,0) and (4,0) bands of the AX system of CO have been re-investigated by high-resolution vacuum ultraviolet absorption spectroscopy. A VUV Fou…
VUV-synchrotron absorption studies of N and CO at 900 K
M. L. Niu, A. N. Heays, S. Jones +5
Photoabsorption spectra of N and CO were recorded at 900K, using the vacuum-ultraviolet Fourier-transform spectrometer at the DESIRS beamline of synchrotron SOLEIL. These high-…
Photodissociation and chemistry of N in the circumstellar envelope of carbon-rich AGB stars
Xiaohu Li, T. J. Millar, Catherine Walsh +2
The envelopes of AGB stars are irradiated externally by ultraviolet photons; hence, the chemistry is sensitive to the photodissociation of N and CO, which are major reservoirs…
Precision spectroscopy of the () rovibrational splittings in H, HD and D
Ming Li Niu, Edcel J. Salumbides, Gareth. D. Dickenson +2
Accurate experimental values for the vibrational ground tone or fundamental vibrational energy splitting of H, HD, and D are presented. Absolute accuracies of $2\times10^{-…
Isotope selective photodissociation of N2 by the interstellar radiation field and cosmic rays
Alan N. Heays, Ruud Visser, Roland Gredel +4
Photodissociation of 14N2 and 14N15N occurs in interstellar clouds, circumstellar envelopes, protoplanetary discs, and other environments due to UV radiation from stellar sources a…
Photodissociation of interstellar N2
Xiaohu Li, Alan N. Heays, Ruud Visser +4
Molecular nitrogen is one of the key species in the chemistry of interstellar clouds and protoplanetary disks and the partitioning of nitrogen between N and N2 controls the formati…
High-resolution Fourier-transform XUV photoabsorption spectroscopy of 14N15N
A. N. Heays, G. D. Dickenson, E. J. Salumbides +5
The first comprehensive high-resolution photoabsorption spectrum of 14N15N has been recorded using the Fourier-transform spectrometer attached to the Desirs beamline at the Soleil…