Probing the Galactic Diffuse Continuum Emission with COSI

Christopher M. Karwin; Thomas Siegert; Jacqueline Beechert; John A. Tomsick; Troy A. Porter; Michela Negro; Carolyn Kierans; Marco Ajello; Israel Martinez-Castellanos; Albert Shih; Andreas Zoglauer; Steven E. Boggs; (for the COSI Collaboration)

doi:10.3847/1538-4357/ad04df

The Astrophysical Journal (Jan 2023)

Probing the Galactic Diffuse Continuum Emission with COSI

Christopher M. Karwin,
Thomas Siegert,
Jacqueline Beechert,
John A. Tomsick,
Troy A. Porter,
Michela Negro,
Carolyn Kierans,
Marco Ajello,
Israel Martinez-Castellanos,
Albert Shih,
Andreas Zoglauer,
Steven E. Boggs,
(for the COSI Collaboration)

Affiliations

Christopher M. Karwin: ORCiD; NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]
Thomas Siegert: ORCiD; Julius-Maximilians-Universität Würzburg , Fakultät für Physik und Astronomie, Institut für Theoretische Physik und Astrophysik, Lehrstuhl für Astronomie, Emil-Fischer-Str. 31, D-97074 Würzburg, Germany
Jacqueline Beechert: ORCiD; Space Sciences Laboratory , UC Berkeley, 7 Gauss Way, University of California, Berkeley, CA 94720, USA
John A. Tomsick: ORCiD; Space Sciences Laboratory , UC Berkeley, 7 Gauss Way, University of California, Berkeley, CA 94720, USA
Troy A. Porter: ORCiD; W.W. Hansen Experimental Physics Laboratory and Kavli Institute for Particle Astrophysics and Cosmology, Stanford University , Stanford, CA 94305, USA
Michela Negro: ORCiD; Department of Physics and Astronomy , Louisiana State University, Baton Rouge, LA 70803, USA
Carolyn Kierans: ORCiD; NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]
Marco Ajello: ORCiD; Department of Physics and Astronomy, Clemson University , Clemson, SC 29634, USA
Israel Martinez-Castellanos: ORCiD; NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]; Department of Astronomy, University of Maryland , College Park, MD 20742, USA
Albert Shih: ORCiD; NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]
Andreas Zoglauer: ORCiD; Space Sciences Laboratory , UC Berkeley, 7 Gauss Way, University of California, Berkeley, CA 94720, USA
Steven E. Boggs: ORCiD; Department of Astronomy & Astrophysics , UC San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
(for the COSI Collaboration)

DOI: https://doi.org/10.3847/1538-4357/ad04df
Journal volume & issue: Vol. 959, no. 2
p. 90

Abstract

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In 2016, the Compton Spectrometer and Imager (COSI) had a successful 46 day flight on board NASA’s Super Pressure Balloon platform. In this work, we report measurements of the Galactic diffuse continuum emission (GDCE) observed toward the inner Galaxy during the flight, which in the COSI energy band (0.2–5 MeV) is primarily generated from inverse Compton radiation. Within uncertainties, we find overall good agreement with previous measurements from INTEGRAL/SPI and COMPTEL. Based on these initial findings, we discuss the potential for further probing the GDCE with the 2016 COSI balloon data, as well as prospects for the upcoming satellite mission.

Published in The Astrophysical Journal

ISSN: 1538-4357 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Astronomy: Astrophysics
Website: https://iopscience.iop.org/journal/0004-637X

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