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

Abstract

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 Å (the H i 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 Way and/or other galaxies, and the intergalactic medium (IGM). We provide wavelengths, oscillator strengths, associated accuracy grades, and references to the oscillator strength determinations. We also attempt to compare and assess the recent oscillator strength determinations. For about 22% of the lines that have updated oscillator strength values, the differences between the former values and the updated ones are ≳0.1 dex. Our compilation will be a useful resource for absorption line studies of the ISM, as well as studies of the CGM and 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 galaxiesmore » against the light of background galaxies will also benefit from our compilation.« less

Authors:
;  [1]; ;  [2];  [3]
  1. Department of Physics and Astronomy, University of South Carolina, Columbia, SC 29208 (United States)
  2. Institute of Theoretical Physics and Astronomy, Vilnius University, Saulėtekio al. 3, LT-10222 Vilnius (Lithuania)
  3. Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506 (United States)
Publication Date:
OSTI Identifier:
22661127
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal, Supplement Series; Journal Volume: 230; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABSORPTION; ASTROPHYSICS; COMPARATIVE EVALUATIONS; COSMIC GAMMA BURSTS; ELEMENT ABUNDANCE; GAMMA RADIATION; INTERSTELLAR SPACE; MILKY WAY; OSCILLATOR STRENGTHS; OSCILLATORS; QUASARS; SPECTROSCOPY; TELESCOPES; VISIBLE RADIATION

Citation Formats

Cashman, Frances H., Kulkarni, Varsha P., Kisielius, Romas, Bogdanovich, Pavel, and Ferland, Gary J. Atomic Data Revisions for Transitions Relevant to Observations of Interstellar, Circumgalactic, and Intergalactic Matter. United States: N. p., 2017. Web. doi:10.3847/1538-4365/AA6D84.
Cashman, Frances H., Kulkarni, Varsha P., Kisielius, Romas, Bogdanovich, Pavel, & Ferland, Gary J. Atomic Data Revisions for Transitions Relevant to Observations of Interstellar, Circumgalactic, and Intergalactic Matter. United States. doi:10.3847/1538-4365/AA6D84.
Cashman, Frances H., Kulkarni, Varsha P., Kisielius, Romas, Bogdanovich, Pavel, and Ferland, Gary J. Mon . "Atomic Data Revisions for Transitions Relevant to Observations of Interstellar, Circumgalactic, and Intergalactic Matter". United States. doi:10.3847/1538-4365/AA6D84.
@article{osti_22661127,
title = {Atomic Data Revisions for Transitions Relevant to Observations of Interstellar, Circumgalactic, and Intergalactic Matter},
author = {Cashman, Frances H. and Kulkarni, Varsha P. and Kisielius, Romas and Bogdanovich, Pavel and Ferland, Gary J.},
abstractNote = {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 Å (the H i 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 Way and/or other galaxies, and the intergalactic medium (IGM). We provide wavelengths, oscillator strengths, associated accuracy grades, and references to the oscillator strength determinations. We also attempt to compare and assess the recent oscillator strength determinations. For about 22% of the lines that have updated oscillator strength values, the differences between the former values and the updated ones are ≳0.1 dex. Our compilation will be a useful resource for absorption line studies of the ISM, as well as studies of the CGM and 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.},
doi = {10.3847/1538-4365/AA6D84},
journal = {Astrophysical Journal, Supplement Series},
number = 1,
volume = 230,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2017},
month = {Mon May 01 00:00:00 EDT 2017}
}