Monthly Notices of the Royal Astronomical Society

Volume 331, Issue 3 pp. L31-L34

C₂ absorption-line diagnostics of diffuse interstellar clouds

Cesare Cecchi-Pestellini,

Corresponding Author

Cesare Cecchi-Pestellini

¹ Harvard–Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA

² Dipartimento di Astronomia e Scienza dello Spazio, Università di Firenze, Largo E. Fermi 2, 50125 Firenze, Italy

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Alexander Dalgarno,

Alexander Dalgarno

¹ Harvard–Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA

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Cesare Cecchi-Pestellini,

Corresponding Author

Cesare Cecchi-Pestellini

¹ Harvard–Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA

² Dipartimento di Astronomia e Scienza dello Spazio, Università di Firenze, Largo E. Fermi 2, 50125 Firenze, Italy

[email protected]Search for more papers by this author

Alexander Dalgarno,

Alexander Dalgarno

¹ Harvard–Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA

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First published: 09 April 2002

https://doi.org/10.1046/j.1365-8711.2002.05418.x

Citations: 2

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Abstract

The excitation of the diatomic carbon molecule in diffuse interstellar clouds is discussed for a cloud with large density fluctuations of small linear filling factor along the line of sight. Possible implications for the chemistry of the diffuse cloud in front of Cygnus OB2 No. 12 are discussed.

Acknowledgments

This research has been supported by the Division of Astronomy of the US National Science Foundation. CC-P thanks the Italian MURST.

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Volume331, Issue3

April 2002

Pages L31-L34

C₂ absorption-line diagnostics of diffuse interstellar clouds

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C₂ absorption-line diagnostics of diffuse interstellar clouds