2 mm GISMO Observations of the Galactic Center. I. Dust Emission

Richard G. Arendt, Johannes Staguhn, Eli Dwek, Mark R. Morris, Farhad Yusef-Zadeh, Dominic J. Benford, Attila Kovács, Junellie Gonzalez-Quiles

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The central molecular zone, covering the inner ∼1° of the Galactic plane has been mapped at 2 mm using the Goddard-IRAM Superconducting 2-Millimeter Observer (GISMO) bolometric camera on the 30 m IRAM telescope. The 21″ resolution maps show abundant emission from cold molecular clouds, from star-forming regions, and from one of the Galactic center nonthermal filaments. In this work we use the Herschel Hi-GAL data to model the dust emission across the Galactic center. We find that a singleerature fit can describe the 160-500 μm emission for most lines of sight, if the long-wavelength dust emissivity scales as λ with β ≈ 2.25. This dust model is extrapolated to predict the 2 mm dust emission. Subtraction of the model from the GISMO data provides a clearer look at the 2 mm emission of star-forming regions and the brightest nonthermal filament.

Original languageEnglish (US)
Article number71
JournalAstrophysical Journal
Volume885
Issue number1
DOIs
StatePublished - Nov 1 2019

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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