810 datasets found

Keywords: atomic physics

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  • FeII emission in a sample of AGN spectra

    We present a study of optical FeII emission in 302 active galactic nuclei (AGNs) selected from the Sloan Digital Sky Survey. We group the strongest FeII multiplets into three...
  • New ground-state measurements of ethyl cyanide

    The spectrum of ethyl cyanide, or propionitrile (CH_3_CH_2_CN), has been repeatedly observed in the interstellar medium with large column densities and surprisingly high...
  • Rare earth abundances

    We have derived new abundances of the rare earth elements Pr, Dy, Tm, Yb, and Lu for the solar photosphere and for five very metal-poor, neutron-capture r-process-rich giant...
  • Analysis of the spectrum of {eta} Car

    We present an analysis of the visible through near-infrared spectrum of Eta Carinae ({eta} Car) and its ejecta obtained during the "{eta} Car Campaign with the Ultraviolet and...
  • Spectrum of ethyl formate

    Since methyl formate (O=CH-O-CH_3_) is found to have a high abundance in Hot molecular cores and other types of clouds in the galactic center, it is reasonable to search among...
  • Swan system of C2

    The C2 Swan system (d ^3^{Pi}g-a ^3^{Pi}u) was observed in emission for the {Delta}v=-3 to {Delta}v=+2 sequences in the 14000-24000cm^-1^ spectral range using a Fourier...
  • Rotational transitions of Methyl carbamate

    The rotational-torsional spectrum of the syn conformer of methyl carbamate [CH_3_OC(:O)NH_2_], an isomer of the essential amino acid glycine [NH_2_CH_2_C(:O)OH], has been...
  • Ionization states and cooling efficiencies

    We present new computations of the equilibrium and nonequilibrium cooling efficiencies and ionization states for low-density radiatively cooling gas containing the elements H,...
  • Oscillator strength ref. for Indus_0 & Indus_13

    The recently discovered Indus stellar stream exhibits a diverse chemical signature compared to what is found for most other streams due to the abundances of two outlier stars,...
  • IR high-res. sp. of hot cores of AFGL2591 & AFGL2136

    We have performed a high-resolution 4-13{mu}m spectral survey of the hot molecular gas associated with the massive protostars AFGL 2591 and AFGL 2136, utilizing the Echelon...
  • Properties of atomic lines in 51 Oph UV spectra

    We measured 304 absorption features in the ultraviolet and visible spectra of the star 51 Oph, which is known to have a debris disk with a high inclination. We analyzed the...
  • ALMA obs. of star-forming regions toward NGC6334I

    The relative column densities of the structural isomers methyl formate, glycolaldehyde, and acetic acid are derived for a dozen positions toward the massive star-forming regions...
  • Observed transitions of CH_3_OH and CH_3_CHO

    IRAM 30m Observations toward eight protostellar outflow sources were taken in the 96-176GHz range. Transitions of CH_3_OH and CH_3_CHO were detected in seven of them. The...
  • Magnetic field measurements of Ap/Bp stars

    We report on magnetic field measurements of 157 chemically peculiar A/B stars (Ap/Bp) based on resolved, magnetically split absorption lines present in H-band spectra provided...
  • A^1^{Pi}-X^1^{Sigma}^+^ transitions of CO study

    Highly correlated ab initio calculations were performed for an accurate determination of the A^1^{Pi}-X^1^{Sigma}^+^ system of the CO molecule. A highly accurate multi-reference...
  • Cosmic-ray nucleosynthesis of p-nuclei

    We investigate the cosmic-ray nucleosynthesis (CRN) of proton-rich stable nuclides (p-nuclides). We calculate the cosmic-ray (CR) energy spectra of heavy nuclides with mass...
  • Nucleosynthesis of p nuclides

    The production of the heavy stable proton-rich isotopes between ^74^Se and ^196^Hg-the p nuclides-is due to the contribution from different nucleosynthesis processes, activated...
  • Theoretical charge exchange X-ray cross sections

    The fundamental collisional process of charge exchange (CX) has been established as a primary source of X-ray emission from the heliosphere, planetary exospheres, and supernova...
  • CH_3_OCH_2_OH ALMA detection in NGC 6334I

    We report the detection of interstellar methoxymethanol (CH_3_OCH_2_OH) in Atacama Large Millimeter/submillimeter Array (ALMA) Bands 6 and 7 toward the MM1 core in the high-mass...
  • Electron-impact multiple-ionization cross sections

    We compiled a set of electron-impact multiple-ionization (EIMI) cross section for astrophysically relevant ions. EIMIs can have a significant effect on the ionization balance of...
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