C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST17:15:15

2003A&A...407L..73P - Astronomy and Astrophysics, volume 407, L73-77 (2003/9-1)

Probing the cosmic ray population of the giant elliptical galaxy M 87 with observed TeV γ-rays.


Abstract (from CDS):

We examine the cosmic ray proton (CRp) population within the giant elliptical galaxy M 87 using the TeV γ-ray detection of the HEGRA collaboration. In our scenario, the γ-rays are produced by decaying pions which result from hadronic CRp interactions with thermal gas of the interstellar medium of M 87. By comparing the γ-ray emission to upper limits from EGRET, we constrain the spectral index of the CRp population to αGeVTeV<2.275 within our scenario. Both the expected radial γ-ray profile and the required amount of CRp support this hadronic scenario. The accompanying radio mini-halo of hadronically originating cosmic ray electrons is outshone by the synchrotron emission of the relativistic jet of M 87 by one order of magnitude. According to our predictions, the future GLAST mission should allow us to test this hadronic scenario.

Abstract Copyright:

Journal keyword(s): γ-rays: theory - cosmic rays - galaxies: individual: M 87 - galaxies: cooling flows - intergalactic medium - radiation mechanisms: non-thermal

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
1 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5652 4
2 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5909 0
3 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6283 3

    Equat.    Gal    SGal    Ecl

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