AST/RO Observations of CO (J=7-6) Emission in NGC 6334

Details AST/RO Observations of CO (J=7-6) Emission in NGC 6334 AST/RO Observations of CO (J=7-6) Emission in NGC 6334

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...200.7305k&link_type=abstract

American Astronomical Society, 200th AAS Meeting, #73.05; Bulletin of the American Astronomical Society, Vol. 34, p.766

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present maps of the massive, southern star-forming region NGC6334 in the CO (J=7-6), CO (J=4-3), and 809 GHz [CI] transitions. These lines were observed with the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO) located at Amundsen-Scott South Pole Station. We find two high-excitation CO components on either side of the X-ray emission peak mapped with ASCA (Sekimoto et al. 2000). Our Large Velocity Gradient (LVG) excitation analysis of the line intensity ratios indicates that the photon-dominated regions in NGC6334 have densities of n(H2) ~ 10(3.9-4.2) cm-3 and kinetic temperatures of T{ k} ~ 25-55 K. With these physical parameters in conjunction with our previously observed 492 GHz [CI] line map, we will discuss a thermal chemical photodissociation model of gas clouds around star forming sites in NGC 6334. This research was supported by the National Science Foundation under a cooperative agreement with the Center for Astrophysical Research in Antarctica (CARA), grant NSF OPP 89-20223. CARA is a National Science Foundation Science and Technology Center.

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