Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...194..237b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 194, no. 1-2, April 1988, p. 237-242.
Astronomy and Astrophysics
Astrophysics
12
Absorption Spectra, Interstellar Matter, Lithium, Magellanic Clouds, Spectral Line Width, Supernova 1987A, Data Reduction, Radial Velocity, Signal To Noise Ratios, Spectral Energy Distribution
Scientific paper
Seven CCD and eleven Reticon spectra of high spectral resolution and low noise have been carefully analysed in search for faint absorption lines due to neutral interstellar lithium λ6708 Å along the line of sight to SN 1987A in the Large Magellanic Cloud. At the velocities of the strongest interstellar Ca II and Na I lines, no evidence of any interstellar feature has been found. An upper limit for the strongest components expected is 0.15 mÅ for both the Galaxy and the LMC. From these the authors infer elemental column densities NGalaxy ≤ 2.6×1011cm-2 and NLMC ≤ 1.4×1011cm-2 and gaseous elemental abundances (Li/H I)Galaxy ≤ 7.7×10-10 and (Li/H I)LMC ≤ 1.0×10-10 with an estimated uncertainty of the abundance limits of a factor of 4 (0.6 dex).
Baade Dietrich
Magain Pierre
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