ApJ, in press Preprint typeset using L ATEX style emulateapj v. 6/22/04 LARGE SCALE CO AND [C I] EMISSION IN THE ρ OPHIUCHI MOLECULAR CLOUD

• Main Authors: Craig A. Kulesa, Aimee L. Hungerford, Christopher K. Walker, Xiaolei Zhang, Adair P. Lane
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2004
• Subjects: Antarctic; The Antarctic; Antarc*
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.317.1269; http://arxiv.org/pdf/astro-ph/0408518v1.pdf

ApJ, in press We present a comprehensive study of the ρ Ophiuchi molecular cloud that addresses aspects of the physical structure and condition of the molecular cloud and its photodissociation region (PDR) by combining far-infrared and submillimeter-wave observations with a wide range of angular scale and resolution. We present 1600 square arcminute maps (2.3 sq. pc) with 0.1 pc resolution in submillimeter CO(4 → 3) and [C I] ( 3 P1 → 3 P0) line emission from the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO), and pointed observations in the CO (7 → 6) and [C I] ( 3 P2 → 3 P1) lines. Within the large scale maps, smaller spectral line maps of 3000 A.U. resolution over ∼90 square arcminutes (0.2 sq. pc) of the cloud in CO, CS, HCO + and their rare isotopomers are made at the Heinrich Hertz Submillimeter Telescope Observatory (HHT) in Arizona. Comparison of CO, HCO +, and [C I] maps with far-infrared observations of atomic and ionic species from the Infrared Space Observatory (ISO), far-infrared and submillimeter continuum emission, and near-infrared H2 emission allows clearer determination of the physical and chemical structure of the ρ Oph photodissociation region (PDR), since each species probes a different physical region of the cloud structure. Although a