Physical and chemical structure of the IC 63 nebula. III. Gas-phase carbon abundance.
Abstract
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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 1996
- Bibcode:
- 1996A&A...309..899J
- Keywords:
-
- ISM: IC 63;
- ATOMS;
- MOLECULES;
- ABUNDANCES;
- RADIO LINES: ISM;
- INFRARED: ISM: LINES