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Università di Roma Tor Vergata & INAF-IASF Roma

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Presentation on theme: "Università di Roma Tor Vergata & INAF-IASF Roma"— Presentation transcript:

1 Università di Roma Tor Vergata & INAF-IASF Roma

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3 An overview AGILE results

4 1 2 The only quantitative approach 3 High magnetic field and X variation

5 Molecular Clouds Protons need high density Ambiguity Inverse Compton peak and pion bump Multiwavelength analysis Low energy analysis INDIRECT PROOFS

6 CAS A W51c IC443 Abdo et al Krause et al Abdo et al Tavani et al CAS A Tycho Giordano et al Abdo et al. 2010

7 W44 (G ) Galactic Plane Mixed morphology AGILE sky E>400 MeV

8 Seta et al. (2004) Wings  interaction with a MC SEMBE: due to the shocked gas Castelletti et al. (2007) Eastern limb spectrum consistent with a diffusive shock acceleration model 94,9-97,5 72,8-79,380,6-88,4 54,6-59,8 45, ,6-42,8 Reach et al. (2005) CO integrated emission over a different velocity range. Discovery of a Radio pulsar  same age and same distance. Wolszczan et al. (1991)

9 Abdo et al. (2010) Spectral break  no linear DSA (Malkov et al. 2010). GeV emission extended  gamma-ray no attributed to radio pulsar.

10 Giuliani, Cardillo,Tavani et al.(2011) VLA contours (Dubner, Castelletti et al.) AGILE map E>400 MeV

11 CO NANTEN image (Fukui ) S[II] Burrell Smith telescop image with ROSAT contours (Castelletti &Dubner, adapted from Giacani et al. 1997) AGILE contours Giuliani, Cardillo, Tavani et al.(2011)

12 Parameter combinations

13 DIRECT PROOF Giuliani, Cardillo, Tavani et al.(2011) The clearest low-energy decay excludes all possible leptonic contributions

14 In all leptonic models, the only particle distribution that can fit radio and gamma-ray data is a broken power-law (Zirakashvili et al. 2007): Giuliani, Cardillo, Tavani et al.(2011)

15 THE BEST LEPTONIC MODEL No-thermal Bremsstrahlung dominated Giuliani, Cardillo, Tavani et al.(2011)

16 In the case of hadronic models, particle distributions that can fit radio and gamma-ray data are power-law with a low-energy cut-off for hadrons and with a high energy cut-off for leptons: Giuliani, Cardillo, Tavani et al.(2011)

17 THE BEST HADRONIC MODEL Giuliani, Cardillo, Tavani et al.(2011)

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19 Possible Developments

20 LINEAR NO LINEAR Particle spectrum modified by shock but no viceversa Particle spectrum modified by shock but also the shock modified by particles. Dumping of the Alfvèn waves in a determined wavelength range One possible mechanism:

21 Giuliani et al., 2010 W28 GeV (AGILE, Giuliani et al 2010) TeV (HESS, Aharonian et al. 2008) Radio (VLA, Brogan et al. 2006)

22 E² J(E) (Erg cm²s⁻¹sr⁻¹) 100 MeV10TeV E² J(E) ( Erg cm²s⁻¹sr⁻¹) 10TeV NearbyDistant

23 GeV (AGILE, Giuliani et al., 2010) TeV (HESS, Aharonian et al.,2008) Radio (VLA, Brogan et al., 2006) Cardillo master thesis Gabici et al., 2009 W28

24 Uchiyama et al. 2010; Malkov et al W44

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26 THANKS TO ALL!


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