ERRATUM: “DEEXCITATION NUCLEAR GAMMA-RAY LINE EMISSION FROM LOW-ENERGY COSMIC RAYS IN THE INNER GALAXY” (2013, ApJ, 763, 98)

Benhabiles-Mezhoud, H.; Kiener, J.; Tatischeff, V.; Strong, A. W.

doi:10.1088/0004-637x/766/2/139

Cited by 6 publications

(7 citation statements)

References 33 publications

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“…MeV gamma-ray observations of the inner Galaxy with the targeted sensitivity (Fig. 1) would provide the first nuclear spectroscopic data on the low-energy CR population [18]. The energy coverage of the telescope would also allow a precise separation of the CR nuclei and electron/positron populations (and spectra) across the Galaxy.…”

Section: Cosmic Ray Interactionsmentioning

confidence: 99%

Gamma-ray astrophysics in the MeV range

et al. 2021

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The energy range between about 100 keV and 1 GeV is of interest for a vast class of astrophysical topics. In particular, (1) it is the missing ingredient for understanding extreme processes in the multi-messenger era; (2) it allows localizing cosmic-ray interactions with background material and radiation in the Universe, and spotting the reprocessing of these particles; (3) last but not least, gamma-ray emission lines trace the formation of elements in the Galaxy and beyond. In addition, studying the still largely unexplored MeV domain of astronomy would provide for a rich observatory science, including the study of compact objects, solar- and Earth-science, as well as fundamental physics. The technological development of silicon microstrip detectors makes it possible now to detect MeV photons in space with high efficiency and low background. During the last decade, a concept of detector (“ASTROGAM”) has been proposed to fulfil these goals, based on a silicon hodoscope, a 3D position-sensitive calorimeter, and an anticoincidence detector. In this paper we stress the importance of a medium size (M-class) space mission, dubbed “ASTROMEV”, to fulfil these objectives.

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Section: Cosmic Ray Interactionsmentioning

confidence: 99%

Gamma-ray astrophysics in the MeV range

et al. 2021

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“…A particularly promising feature of the predicted gamma-ray spectrum is the characteristic bump in the range 3 -10 MeV, which is produced by several strong lines of 12 C and 16 O. Simulated gamma-ray line spectra of an individual nearby superbubble is reported in [28,29]. The spectrum is dominated by both narrow and broad 12 C and 16 O lines providing a way to constrain low energy CR composition.…”

Section: De-excitation Linesmentioning

confidence: 99%

Cosmic Rays and the Interstellar Medium with the All-Sky Medium Energy Gamma-ray Observatory (AMEGO)

Orlando¹,

Grenier²,

Tatischeff³

et al. 2019

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)

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We identify the scientific prospects for studying low-energy cosmic rays, the interstellar medium, and the associated gamma-ray emissions with a next-generation wide-field telescope from 200 keV to 10 GeV. With improved angular resolution and more than an order of magnitude better sensitivity than previous instruments, the All-sky Medium Energy Gamma-ray Observatory (AMEGO) would allow for the first time to study in detail the low-energy cosmic rays, which play a fundamental role in the formation of stars and in the dynamics of the interstellar medium. It would allow mapping the cosmic-ray distribution in order to understand their propagation in the Galaxy. We discuss the importance of having such a telescope, and we present the predictions for the gamma-ray continuum both at large scale and in individual clouds, and for de-excitation nuclear lines. This paper is based on the Astro2020: Decadal Survey on Astronomy and Astrophysics, science white papers, no. 151; Orlando E. et al. Bulletin of the American Astronomical Society, Vol. 51, Issue 3, id. 151 (2019) "Cosmic Rays and Interstellar Medium with Gamma-Ray Observations at MeV Energies" [1], where more details can be found.

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“…The gamma-ray spectrum is predicted to have a characteristic bump in the range 3 -10 MeV, which is produced by several strong lines of 12 C and 16 O. Simulated gamma-ray line spectra of an individual nearby superbubble is reported in [44,7]. The spectrum is comprises narrow and broad 12 C and 16 O lines, the observation of which would constrain low energy CR composition.…”

Section: De-excitation Nuclear Linesmentioning

confidence: 99%

“…Nuclear emission lines from isotopes in massive and exploding stars, such as 44 Ti, 26 Al, and 60 Fe, allow a probe of nucleosynthesis and chemical evolution of the Galaxy. While the above-cited radioisotopes with relatively long lifetimes produce diffuse emission that provides insights on stellar nucleosynthesis and also on the Galactic interstellar medium, the radioisotopes with shorter lifetimes, such as 7 Be, 56 Ni, 58 Ni, provide information about the explosion and the early evolution of the remnant.…”

Section: Nucleosynthesis Linesmentioning

confidence: 99%

Exploring the MeV Sky with a Combined Coded Mask and Compton Telescope: The Galactic Explorer with a Coded Aperture Mask Compton Telescope (GECCO)

Orlando,

Bottacini,

Moiseev

et al. 2021

Preprint

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The sky at MeV energies is currently poorly explored. Here we present an innovative mission concept and we outline the scientific motivation for combining a coded mask and a Compton telescope. 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 will bridge 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 will finally disentangle the discrete sources from the truly diffuse emission, unveiling the origin of the gamma-ray Galactic center excess and the Fermi Bubbles, and uncovering properties of lowenergy cosmic rays, and their propagation in the Galaxy. Individual Galactic and extragalactic sources will be detected, which will also allow studies of source populations. Nuclear and annihilation lines will be 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. It will also detect explosive transient gamma-ray sources, which will enable identifying and studying the astrophysical objects that produce gravitational waves and neutrinos in a multi-messenger context. A GECCO mission will provide essential contributions to the areas "New Messengers and New Physics" and "Unveiling the Drivers of Galaxy Growth" emphasized in the Decadal Report on Astronomy and Astrophysics 2020.

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ERRATUM: “DEEXCITATION NUCLEAR GAMMA-RAY LINE EMISSION FROM LOW-ENERGY COSMIC RAYS IN THE INNER GALAXY” (2013, ApJ, 763, 98)

Cited by 6 publications

References 33 publications

Gamma-ray astrophysics in the MeV range

Gamma-ray astrophysics in the MeV range

Cosmic Rays and the Interstellar Medium with the All-Sky Medium Energy Gamma-ray Observatory (AMEGO)

Exploring the MeV Sky with a Combined Coded Mask and Compton Telescope: The Galactic Explorer with a Coded Aperture Mask Compton Telescope (GECCO)

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