Hungry for Honey

Kierans, Eilis

doi:10.4324/9781003047889-14

Cited by 2 publications

(3 citation statements)

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“…With a factor of 2 improvement on its design specification (A = 40 cm 2 ), COSI would be able to see the echo from stars at D ∼ 0.2 kpc, like supernova candidates Betelgeuse and ò Pegasi. For the largest telescopes of the next generation, AMEGO (McEnery et al 2019;Kierans 2020; A ∼ 3 ´10 3 cm), and GECCO (A ∼ 800 cm; Orlando et al 2022), the echo might be visible for stars within a radius of 1 kpc or so, where about 31 supernova candidates are located (Mukhopadhyay et al 2020).…”

Section: Detectabilitymentioning

confidence: 99%

“…The second is the discussion of the potential of upcoming gamma-ray surveys to observe the echo from nearby core-collapse supernovae, and extract important information from it. With improved, nextgeneration gamma-ray telescopes like COSI (Tomsick 2021; already funded), AMEGO (McEnery et al 2019;Kierans 2020), and AMEGO-X (Caputo et al 2022), detecting this 511 keV signal will soon be a realistic possibility.…”

Section: Introductionmentioning

confidence: 99%

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Photons from Neutrinos: The Gamma-Ray Echo of a Supernova Neutrino Burst

Lunardini,

Loeffler,

Mukhopadhyay

et al. 2024

ApJ

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When a star undergoes core collapse, a vast amount of energy is released in a ∼10 s long burst of neutrinos of all species. Inverse beta decay in the star’s hydrogen envelope causes an electromagnetic cascade that ultimately results in a flare of gamma rays—an “echo” of the neutrino burst—at the characteristic energy of 0.511 MeV. We study the phenomenology and detectability of this flare. Its luminosity curve is characterized by a fast, seconds-long rise and an equally fast decline, with a minute- or hour-long plateau in between. For a near-Earth star (distance D ≲ 1 kpc) the echo will be observable at near future gamma-ray telescopes with an effective area of 103 cm2 or larger. Its observation will inform us on the envelope size and composition. In conjunction with the direct detection of the neutrino burst, it will also give information on the neutrino emission away from the line of sight and will enable tests of neutrino propagation effects between the stellar surface and Earth.

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Section: Detectabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photons from Neutrinos: The Gamma-Ray Echo of a Supernova Neutrino Burst

Lunardini,

Loeffler,

Mukhopadhyay

et al. 2024

ApJ

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“…The ComPair instrument is a prototype next-generation gamma-ray observatory [5]. To demonstrate the instrument's potential to measure photons that undergo Compton scattering or pair production processes, the ComPair team has developed a prototype that consists of all four AMEGO subsystems on a small scale and focused over a smaller energy range, 0.2 -25 MeV [10].…”

Section: The Compton Pair Telescopementioning

confidence: 99%

The Compton Pair telescope: A prototype for a next-generation MeV gamma-ray observatory

Valverde,

Kirschner,

Metzler

et al. 2023

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)

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The Compton Pair (ComPair) telescope is a prototype that aims to develop the necessary technologies for future medium energy gamma-ray missions and to design, build, and test the prototype in a gamma-ray beam and balloon flight. The ComPair team has built an instrument that consists of 4 detector subsystems: a double-sided silicon strip detector Tracker, a novel high-resolution virtual Frisch-grid cadmium zinc telluride Calorimeter, and a high-energy hodoscopic cesium iodide Calorimeter, all of which are surrounded by a plastic scintillator anti-coincidence detector. These subsystems together detect and characterize photons via Compton scattering and pair production, enable a veto of cosmic rays, and are a proof-of-concept for a space telescope with the same architecture. A future medium-energy gamma-ray mission enabled through ComPair will address many questions posed in the Astro2020 Decadal survey in both the New Messengers and New Physics and the Cosmic Ecosystems themes. In this contribution, we will give an overview of the ComPair project and steps forward to the balloon flight.

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Hungry for Honey

Cited by 2 publications

References 0 publications

Photons from Neutrinos: The Gamma-Ray Echo of a Supernova Neutrino Burst

Photons from Neutrinos: The Gamma-Ray Echo of a Supernova Neutrino Burst

The Compton Pair telescope: A prototype for a next-generation MeV gamma-ray observatory

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