Physical and chemical structure of the IC 63 nebula. III. Gas-phase carbon abundance.

Details Physical and chemical structure of the IC 63 nebula. III. Gas-phase carbon abundance. Physical and chemical structure of the IC 63 nebula. III. Gas-phase carbon abundance.

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...309..899j&link_type=abstract

Astronomy and Astrophysics, v.309, p.899-906

Astronomy and Astrophysics

Astrophysics

24

Ism: Ic 63, Atoms, Molecules, Abundances, Radio Lines: Ism, Infrared: Ism: Lines

Scientific paper

Observations of the 609μm line of atomic carbon, the 158μm line of ionized carbon, and multiple high-J transitions of the CO molecule and its isotopes are presented for the reflection/emission nebula IC 63. All important gas-phase forms of carbon have therefore been measured, enabling an accurate determination of the carbon abundance in the gas-phase in this well defined cloud. We find that the gas-phase fraction of carbon in IC 63 is only 13^+6^_-4_% of the solar abundance, significantly lower than found in diffuse clouds and in some dense clouds.

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