DIFFUSE INTERSTELLAR BANDS VERSUS KNOWN ATOMIC AND MOLECULAR SPECIES IN THE INTERSTELLAR MEDIUM OF M82 TOWARD SN 2014J

We discuss the absorption due to various constituents of the interstellar medium (ISM) of M82 seen in moderately high-resolution, high signal-to-noise ratio optical spectra of SN 2014J. Comparisons of the column densities of the atomic and molecular species and the equivalent widths of the DIBs reve...

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Bibliographic Details
Published inThe Astrophysical journal Vol. 792; no. 2; pp. 1 - 14
Main Authors Welty, Daniel E, Ritchey, Adam M, Dahlstrom, Julie A, York, Donald G
Format Journal Article
LanguageEnglish
Published United States 10.09.2014
Subjects
ABSORPTION
Analogies
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
ATOMS
CALCIUM
CARBON NITRIDES
COMPARATIVE EVALUATIONS
CYANIDES
DENSITY
Diffuse interstellar bands
ELEMENT ABUNDANCE
Equivalence
Interstellar matter
MAGELLANIC CLOUDS
MOLECULES
NEAR INFRARED RADIATION
PHOTOMETRY
POTASSIUM
RESOLUTION
SIGNAL-TO-NOISE RATIO
SODIUM
SPECTRA
SUPERNOVAE
VELOCITY
Visual
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Summary:We discuss the absorption due to various constituents of the interstellar medium (ISM) of M82 seen in moderately high-resolution, high signal-to-noise ratio optical spectra of SN 2014J. Comparisons of the column densities of the atomic and molecular species and the equivalent widths of the DIBs reveal both similarities and differences in relative abundances, compared to trends seen in the ISM of our Galaxy and the Magellanic Clouds. We compare estimates for the host galaxy reddening E(B-V) and visual extinction AV derived from the various interstellar species with the values estimated from optical and near-IR photometry of SN 2014J.
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ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/792/2/106