Probing the Galactic Diffuse Continuum Emission with COSI

Probing the Galactic Diffuse Continuum Emission with COSI

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...

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Veröffentlicht in:The Astrophysical journal 2023-12, Vol.959 (2), p.90
Hauptverfasser: Karwin, Christopher M., Siegert, Thomas, Beechert, Jacqueline, Tomsick, John A., Porter, Troy A., Negro, Michela, Kierans, Carolyn, Ajello, Marco, Martinez-Castellanos, Israel, Shih, Albert, Zoglauer, Andreas, Boggs, Steven E.
Format: Artikel
Sprache:eng
Schlagworte:
Astrophysics
Continuum radiation
Emission measurements
Emissions
Energy bands
Flight
Galactic center
Galactic cosmic rays
Galaxies
Gamma-ray telescopes
Gamma-rays
Superpressure balloons
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Beschreibung
Zusammenfassung: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.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/ad04df