• What is HEXOS?
  • Team Members
• Observational Program
  • Main Goals
  • Observations & Sub Programs
    • Orion KL HIFI/PACS
    • Orion S HIFI/PACS
    • Orion Bar Program
    • Sgr B2 (N) HIFI/PACS
    • Sgr B2 (M) HIFI/PACS
    • Orion Water Mapping
    • Polarization
    • Searching for Deep Molecules
    • Searching for Large Molecules
• Publications & Presentations
• Detected Far-Infrared Lines
• Data Reduction Resources
• HEXOS Wiki
• Get HEXOS Data

Sgr B2(M)—HIFI/PACS Line Survey

Sgr B2(M) is the strongest submillimeter continuum source in the Galaxy. This makes it the best candidate for absorption studies, probing the entire line of sight between the Sun and the Galactic center, with clouds in the Orion, Sagittarius, and Scutum spiral arms easily identified at separate velocities. The HIFI and PACS line surveys toward Sgr B2(M) (and also N) will therefore probe, in absorption, the low-density gas that provides the initial chemical conditions out of which the GMCs would have formed. We plan complete scans of the HIFI bands (using DBS) and also PACS range spectroscopy in SED red and blue wavelength ranges. Peter Schilke and Claudia Comito are the coordinators for the HIFI portion of this subprogram, with Jose Cernicharo the coordinator for PACS scans.

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