Detection of silicon in the Galactic center

Details Detection of silicon in the Galactic center Detection of silicon in the Galactic center

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...309l..13h&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 309, Oct. 1, 1986, p. L13-L16.

Astronomy and Astrophysics

Astrophysics

7

Abundance, Galactic Nuclei, Milky Way Galaxy, Silicon, H Ii Regions, Interstellar Matter, Line Spectra, Photodissociation

Scientific paper

The authors report the detection of the [Si II] 34.815 μm line in the galactic center region, Sgr A West. This is the first detection of silicon in this source. Three positions were measured, IRS 16 and points ±1 pc from IRS 16 along the galactic plane. The deduced [Si II] 34.8 μm/[O I] 63 μm line ratio is a factor of 3 higher than that observed for the photodissociation region (PDR) in the Orion Nebula. This could either reflect a difference in the gas-phase silicon abundance relative to oxygen or a difference in the PDR of the galactic center relative to Orion.

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