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H_2_ d^3^{Pi}_u_ excitation by electron impact
Electron-impact excitation of H_2_ triplet states plays an important role in the heating of outer planet upper thermospheres. The d^3^{Pi}u state is the third ungerade triplet... -
3600-24700{AA} deep X-shooter spectrum of HH 1
We present deep spectroscopic (3600-24700{AA}) X-shooter observations of the bright Herbig-Haro object HH 1, one of the best laboratories to study the chemical and physical... -
CO ro-vibrational transitions
We present calculated rate coefficients for ro-vibrational transitions of CO in collisions with H atoms for a gas temperature range of 10K<=T<=3000K, based on the recent... -
Fe^7+^ ionization cross section
We have measured electron impact ionization for Fe^7+^ from the ionization threshold up to 1200eV. The measurements were performed using the TSR heavy ion storage ring. The ions... -
Empirical methane (CH_4_) line list
Hot methane is found in many "cool" sub-stellar astronomical sources including brown dwarfs and exoplanets, as well as in combustion environments on Earth. We report on the... -
CH_3_NCO (methyl isocyanate) transition frequencies
A new interstellar molecule, CH_3_NCO (methyl isocyanate), has been detected using the 12m telescope of the Arizona Radio Observatory (ARO). CH_3_NCO was identified in spectra... -
Collision strengths in FeIX
Collision strengths and thermally averaged collision strengths for a large number of extreme-ultraviolet lines of FeIX arising by electron impact have been reported. The... -
Methyl acetate (CH_3_COOCH_3_) rotational transitions
Methyl acetate (CH_3_COOCH_3_) has been recently observed by the IRAM 30m radio telescope in Orion, though the presence of its deuterated isotopomers is yet to be confirmed. We... -
FeII radiative transition rates
We present extensive calculations of radiative transition rates and electron impact collision strengths for FeII. The data sets involve 52 levels from the 3d^7^, 3d^6^4s, and... -
Disilicon carbide (SiCSi) discovery in CW Leo
We report the discovery in space of a disilicon species, SiCSi, from observations between 80 and 350GHz with the IRAM 30m radio telescope. Owing to the close coordination... -
Transition frequencies of MN and DMN
High-resolution pure rotational spectra of four alkylnaphthalenes were measured in the range of 6-15GHz using a molecular-beam Fourier-transform microwave spectrometer. Both a-... -
ZnII lines and collision strengths
Damped Ly{alpha} (DLA) and sub-DLA absorbers in quasar spectra provide the most sensitive tools for measuring the element abundances of distant galaxies. The estimation of... -
PH_2_CN/CH_3_PH_2_ rotational transition frequency
Millimeter/submillimeter spectra of PH_2_CN(~{X} ^1^A') and CH_3_PH_2_(~{X} ^1^A') have been recorded for the first time using direct absorption techniques. This work extends... -
Experimental spectrum of methanol (CH_3_OH)
The spectrum of methanol (CH_3_OH) has been characterized between 214.6 and 265.4 GHz for astrophysically significant temperatures. Four hundred and eighty-six spectra with... -
Detection of CH_3_COOCH_3_ in Orion
We report on the discovery of methyl acetate, CH_3_COOCH_3_, through the detection of a large number of rotational lines from each one of the spin states of the molecule: AA... -
18 Sco atomic data and equivalent widths
We study with unprecedented detail the chemical composition and stellar parameters of the solar twin 18 Sco in a strictly differential sense relative to the Sun. Our study is... -
Methane partition function
The paper describes the construction of complete sets of hot methane lines based on accurate ab initio potential and dipole moment surfaces and extensive first-principle... -
Collision strengths for transitions in Fe VII
Extensive calculations have been performed for electron impact excitation collision strengths and oscillator strengths for the Fe VII extreme ultraviolet lines of astrophysical... -
Properties of the highly ionized gas of quasars
We present the first results from our NASA Keck Observatory Database of Ionized Absorbers toward Quasars (KODIAQ) survey which aims to characterize the properties of the highly... -
Effective collision strengths of Si VII
The effective collision strengths for electron-impact excitation of fine-structure transitions in Si VII are calculated as a function of electron temperature in the range...
