MG15 - Talk detail |
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Participant |
Saturni, Francesco Gabriele | |||||||
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Institution |
INAF - Astronomical Observatory of Rome - Via Frascati, 33 - Monte Porzio Catone - RM - Italy | |||||||
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Session |
DM4 |
Accepted |
Yes |
Order |
13 |
Time |
18:45 | 15' |
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Talk |
Oral abstract |
Title |
The Quest for Dark Matter in Astronomical Sources with Cherenkov Telescopes | |||||
| Coauthors | Saturni, Francesco G.; Antonelli, Lucio A.; Lombardi, Saverio | |||||||
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Abstract |
The problem of dark matter (DM) detection is of paramount importance for modern astrophysics, since it would allow to fully characterize the properties of the ``missing'' mass in the Universe. So far, in fact, the existence of DM is only based on the indirect observations of its gravitational effects on astronomical objects. Efforts to identify plausible DM particle candidates essentially fail without any direct hint about DM physics. Recently, a framework for the astronomical search of DM signals has been arising from the possibility that DM particles self-interact to produce Standard-Model pairs, that subsequently annihilate into final-state gamma photons. The observation of such photons is a task potentially at reach of next-generation Cherenkov telescopes. In this talk, I will illustrate the capabilities of future Cherenkov instruments to detect gamma rays from DM self-interaction by observing low-background, DM-dominated astronomical objects such as the dwarf spheroidal galaxies (dSphs). |
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Pdf file |
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Session |
DM4 |
Accepted |
Yes |
Order |
7 |
Time |
17:15 | 15' |
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Talk |
Oral abstract |
Title |
Macro Dark Matter Self-Gravitating Halos around Galaxies | |||||
| Coauthors | Merafina, Marco; Piscicchia, Kristian | |||||||
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Abstract |
A new family of non-relativistic, Newtonian non-quantum equilibrium configurations describing galactic halos is introduced, taking into account a new possibility to identify particles with masses larger than 1 GeV as components of the dark matter. This possibility may have important implications on the formation of very massive particles during the Big Bang. The obtained results are in agreement with the requested values in mass and radius in order to be consistent with the rotational velocity curve observed in the Galaxy. Additionally, the average density of such dark matter halos is similar to that derived for halos of dwarf spheroidal galaxies, which can therefore be interpreted as downscaled versions of larger dark matter distributions around Milky Way-sized galaxies and hint for a common origin of the two families of cosmic structures. |
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Pdf file |
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