Atomic Data Revisions for Transitions Relevant to Observations of Interstellar, Circumgalactic, and Intergalactic Matter

2017
Measurements of element abundances in galaxies from astrophysical spectroscopy depend sensitively on the atomic data used. With the goal of making the latest atomic data accessible to the community, we present a compilation of selected atomic data for resonant absorption lines at wavelengths longward of 911.753 {\AA} (the \ion{H}{1} Lyman limit), for key heavy elements (heavier than atomic number 5) of astrophysical interest. In particular, we focus on the transitions of those ions that have been observed in the Milky Way interstellar medium(ISM), the circumgalactic medium ( CGM) of the Milky Wayand/or other galaxies, and the intergalactic medium (IGM). We provide wavelengths, oscillator strengths(both previous and new determinations, where available), associated accuracy grades, and references to the oscillator strengthdeterminations. We also attempt to compare and assess the recent oscillator strengthdeterminations. For about 22\% of the lines that have updated oscillator strengthvalues, the differences between the former values and the updated ones are $\gtrsim$~0.1 dex. Our compilation will be a useful resource for absorption line studies of the ISM, as well as studies of the CGMand IGM traced by sight lines to quasars and gamma-ray bursts. Studies (including those enabled by future generations of extremely large telescopes) of absorption by galaxies against the light of background galaxies will also benefit from our compilation.
    • Correction
    • Cite
    • Save
    0
    References
    0
    Citations
    NaN
    KQI
    []
    Baidu
    map