Exploring the MeV sky with a combined coded mask and Compton telescope: the Galactic Explorer with a Coded aperture mask Compton telescope (GECCO)

Orlando, Elena; Bottacini, Eugenio; Moiseev, A. A.; Bodaghee, Arash; Collmar, Werner; Ensslin, Torsten; Moskalenko, Igor V.; Negro, Michela; Profumo, Stefano; Digel, Seth W.; Thompson, David J.; Baring, Matthew G.; Bolotnikov, Aleksey; Cannady, Nicholas; Carini, Gabriella A.; Eberle, Vincent; Grenier, Isabelle A.; Harding, Alice K.; Hartmann, Dieter; Herrmann, Sven; Kerr, Matthew; Krivonos, Roman; Laurent, Philippe; Longo, Francesco; Morselli, Aldo; Philips, Bernard; Sasaki, Makoto; Shawhan, Peter; Shy, Daniel; Skinner, Gerry; Smith, Lucas D.; Stecker, Floyd W.; Strong, Andrew; Sturner, Steven; Tomsick, John A.; Wadiasingh, Zorawar; Woolf, Richard S.; Yates, Eric; Ziock, Klaus-Peter; Zoglauer, Andreas

doi:10.1088/1475-7516/2022/07/036

Title: Exploring the MeV sky with a combined coded mask and Compton telescope: the Galactic Explorer with a Coded aperture mask Compton telescope (GECCO)

Journal Article · 20 July 2022 · Journal of Cosmology and Astroparticle Physics

DOI: https://doi.org/10.1088/1475-7516/2022/07/036 · OSTI ID:2429286

Orlando, Elena ^[1]; Bottacini, Eugenio ^[2]; Moiseev, A. A. ^[3]; Bodaghee, Arash ^[4]; Collmar, Werner ^[5]; Ensslin, Torsten ^[6]; Moskalenko, Igor V. ^[7]; Negro, Michela ^[8]; Profumo, Stefano ^[9]; Digel, Seth W. ^[10]; Thompson, David J. ^[11]; Baring, Matthew G. ^[12]; Bolotnikov, Aleksey ^[13]; Cannady, Nicholas ^[8]; Carini, Gabriella A. ^[13]; Eberle, Vincent ^[14]; Grenier, Isabelle A. ^[15]; Harding, Alice K. ^[16]; Hartmann, Dieter ^[17]; Herrmann, Sven ^[13] more »

Istituto Nazionale di Fisica Nucleare (INFN), Trieste (Italy); Univ. of Trieste (Italy); Stanford Univ., CA (United States). Kavli Institute for Particle Astrophysics & Cosmology; SLAC
Univ. di Padova (Italy); Eureka Scientific, Oakland, CA (United States)
Univ. of Maryland, College Park, MD (United States); NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States). Center for Research and Exploration in Space Science and Technology
Georgia College and State University, Milledgeville, GA (United States)
Max Planck Inst. fuer Extraterrestrische Physik, Garching (Germany)
Max Planck Institute for Astrophysics, Garching (Germany)
Stanford Univ., CA (United States). Kavli Institute for Particle Astrophysics & Cosmology
Univ. of Maryland Baltimore County (UMBC), Baltimore, MD (United States); NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States). Center for Research and Exploration in Space Science and Technology
Univ. of California, Santa Cruz, CA (United States). Santa Cruz Institute for Particle Physics
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
Rice Univ., Houston, TX (United States)
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Max Planck Institute for Astrophysics, Garching (Germany); Ludwig Maximilian Univ. of Munich, Munich (Germany)
Univ. Paris-Saclay, Gif-sur-Yvette (France)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Clemson Univ., SC (United States)
Naval Research Lab. (NRL), Washington, DC (United States)
Space Research Institute (IKI), Moscow (Russia)
Commissariat a l'Energie Atomique et aux Energies Alternatives (CEA-Saclay), Gif-sur-Yvette (France)
Istituto Nazionale di Fisica Nucleare (INFN), Trieste (Italy); Univ. of Trieste (Italy)
Istituto Nazionale di Fisica Nucleare (INFN), Rome (Italy). Roma Tor Vergata
Univ. of Maryland, College Park, MD (United States)
Univ. of Birmingham (United Kingdom)
Univ. of California, Berkeley, CA (United States). Space Sciences Lab.
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

The sky at MeV energies is currently poorly explored. Here we present an innovative mission concept that builds upon the heritage of past and current missions improving the sensitivity and, very importantly, the angular resolution. This consists in combining a Compton telescope and a coded-mask telescope. We delineate the motivation for such a concept and we define the scientific goals for such a mission. The Galactic Explorer with a Coded Aperture Mask Compton Telescope (GECCO) is a novel concept for a next-generation telescope covering hard X-ray and soft gamma-ray energies. The potential and importance of this approach that bridges the observational gap in the MeV energy range are presented. With the unprecedented angular resolution of the coded mask telescope combined with the sensitive Compton telescope, a mission such as GECCO can disentangle the discrete sources from the truly diffuse emission. Individual Galactic and extragalactic sources are detected. This also allows to understand the gamma-ray Galactic center excess and the Fermi Bubbles, and to trace the low-energy cosmic rays, and their propagation in the Galaxy. Nuclear and annihilation lines are spatially and spectrally resolved from the continuum emission and from sources, addressing the role of low-energy cosmic rays in star formation and galaxy evolution, the origin of the 511 keV positron line, fundamental physics, and the chemical enrichment in the Galaxy. Such an instrument also detects explosive transient gamma-ray sources, which, in turn, enables identifying and studying the astrophysical objects that produce gravitational waves and neutrinos in a multi-messenger context. By looking at a poorly explored energy band it also allows discoveries of new astrophysical phenomena.

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Research Organization:: SLAC

Sponsoring Organization:: National Aeronautics and Space Administration (NASA); USDOE Office of Science (SC)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 2429286

Journal Information:: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 07 Vol. 2022; ISSN 1475-7516

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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Population Properties of Compact Objects from the Second LIGO–Virgo Gravitational-Wave Transient Catalog Abbott, R.; Abbott, T. D.; Abraham, S. The Astrophysical Journal Letters, Vol. 913, Issue 1 https://doi.org/10.3847/2041-8213/abe949	journal	May 2021

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