Na I D Lines in the SN 2002ap Spectrum

Details Na I D Lines in the SN 2002ap Spectrum Na I D Lines in the SN 2002ap Spectrum

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002pasj...54..899t&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.54, No.6, pp.899-903

Astronomy and Astrophysics

Astronomy

10

Galaxies: Individual (M 74), Ism: Atoms, Supernovae: Individual (Sn 2002Ap)

Scientific paper

High-dispersion, high-S/N spectroscopic observations of SN2002ap in M74 were carried out in the wavelength range of 4120-6860Å using the High Dispersion Spectrograph of the Subaru Telescope. Neither emission nor absorption features relating to SN2002ap itself were identified in the high-dispersion echelle spectrum, but a pair of Na I D1 and D2 absorption lines were detected at a redshift corresponding to the disk of M74, and each was found to show three components. The column densities of these components are log N(Na I) = 11.47, 10.47, and 10.72 for the first, second, and third components, respectively. The interstellar reddening in M74 was estimated from these components, and was combined with that in the Galaxy to yield a total value of E(B-V) = 0.09 ± 0.01 along the line of sight to SN2002ap.

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