SIMBAD references

1999ApJ...527L..59I - Astrophys. J., 527, L59-L62 (1999/December-2)

Large-scale mapping observations of the C I (3P1-3P0) and CO (J = 3-2) lines toward the Orion A molecular cloud.

IKEDA M., MAEZAWA H., ITO T., SAITO G., SEKIMOTO Y., YAMAMOTO S., TATEMATSU K., ARIKAWA Y., ASO Y., NOGUCHI T., SHI S.-C., MIYAZAWA K., SAITO S., OZEKI H., FUJIWARA H., OHISHI M. and INATANI J.

Abstract (from CDS):

Large-scale mapping observations of the 3P1-3P0 fine-structure transition of atomic carbon (C I, 492 GHz) and the J=3-2 transition of CO (346 GHz) toward the Orion A molecular cloud have been carried out with the Mount Fuji submillimeter-wave telescope. The observations cover 9 deg2 and include the Orion Nebula M42 and the L1641 dark cloud complex. The C I emission extends over almost the entire region of the Orion A cloud and is surprisingly similar to that of 13CO (J=1-0). The CO (J=3-2) emission shows a more featureless and extended distribution than C I. The C I/CO (J=3-2) integrated intensity ratio shows a spatial gradient running from the north (0.10) to the south (1.2) of the Orion A cloud, which we interpret as a consequence of the temperature gradient. On the other hand, the C I/13CO (J=1-0) intensity ratio shows no systematic gradient. We have found a good correlation between the C I and 13CO (J=1-0) intensities over the Orion A cloud. This result is discussed on the basis of photodissociation region models.

Abstract Copyright:

Journal keyword(s): ISM: Atoms - ISM: Individual: Name: Orion A Cloud - ISM: Molecules

Errata: Erratum vol. 529, p. L119 (2000)

Simbad objects: 16

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