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 journalArticle

1 Scopus citations


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
Issue number1
StatePublished - Nov 1 2019

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of '2 mm GISMO Observations of the Galactic Center. I. Dust Emission'. Together they form a unique fingerprint.

  • Cite this

    Arendt, R. G., Staguhn, J., Dwek, E., Morris, M. R., Yusef-Zadeh, F., Benford, D. J., Kovács, A., & Gonzalez-Quiles, J. (2019). 2 mm GISMO Observations of the Galactic Center. I. Dust Emission. Astrophysical Journal, 885(1), [71]. https://doi.org/10.3847/1538-4357/ab451c