Publication: Spectral study of the HESS J1745-290 gamma-ray source as dark matter signal
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2013-04
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Iop Publishing Ltd
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We study the main spectral features of the gamma-ray fluxes observed by the High Energy Stereoscopic System (HESS) from the J1745-290 Galactic Center source during the years 2004, 2005 and 2006. In particular, we show that these data are well fitted as the secondary gamma-rays photons generated from dark matter annihilating into Standard Model particles in combination with a simple power law background. We present explicit analyses for annihilation in a single standard model particle-antiparticle pair. In this case, the best fits are obtained for the u (u) over bar and d (d) over bar quark channels and for the W+W- and ZZ gauge bosons, with background spectral index compatible with the Fermi-Large Area Telescope (LAT) data from the same region. The fits return a heavy WIMP, with a mass above similar to 10 TeV, but well below the unitarity limit for thermal relic annihilation.
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© 2013 IOP Publishing Ltd and Sissa Medialab srl.
We thank Alvaro de la Cruz-Dombriz for useful comments. This work has been supported by MICINN (Spain) project numbers FIS 2008-01323, FIS2011-23000, FPA2011-27853-01 and Consolider Ingenio MULTIDARK CSD2009-00064.
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[1] MAGIC collaboration, J. Aleksic et al., Searches for Dark Matter annihilation signatures in the Segue 1 satellite galaxy with the MAGIC-I telescope, JCAP 06 (2011) 035 [arXiv:1103.0477] [INSPIRE].
[2] Fermi-LAT collaboration, A. Abdo et al., Observations of Milky Way Dwarf Spheroidal galaxies with the Fermi-LAT detector and constraints on Dark Matter models, Astrophys. J. 712 (2010) 147 [arXiv:1001.4531] [INSPIRE].
[3] CANGAROO-II collaboration, K. Tsuchiya et al., Detection of sub-TeV gamma-rays from the Galactic Center direction by CANGAROO-II, Astrophys. J. 606 (2004) L115 [astro-ph/0403592] [INSPIRE].
[4] VERITAS collaboration, K. Kosack et al., TeV gamma-ray observations of the galactic center, Astrophys. J. 608 (2004) L97 [astro-ph/0403422] [INSPIRE].
[5] HESS collaboration, F. Aharonian et al., Very high-energy gamma rays from the direction of Sagittarius A*, Astron. Astrophys. 425 (2004) L13 [astro-ph/0408145] [INSPIRE].
[6] HESS collaboration, F. Aharonian and F. Aharonian, Spectrum and variability of the Galactic Center VHE gamma-ray source HESS J1745-290, Astron. Astrophys. 503 (2009) 817 [arXiv:0906.1247] [INSPIRE].
[7] MAGIC collaboration, J. Albert et al., Observation of gamma-rays from the galactic center with the magic telescope, Astrophys. J. 638 (2006) L101 [astro-ph/0512469] [INSPIRE].
[8] Fermi/LAT collaboration, V. Vitale and A. Morselli, Indirect Search for Dark Matter from the center of the Milky Way with the Fermi-Large Area Telescope, arXiv:0912.3828 [INSPIRE].
[9] M. Chernyakova, D. Malyshev, F. Aharonian, R. Crocker and D. Jones, The high-energy, Arcminute-scale galactic center gamma-ray source, Astrophys. J. 726 (2011) 60 [arXiv:1009.2630] [INSPIRE]; T. Linden, E. Lovegrove and S. Profumo, The Morphology of Hadronic Emission Models for the Gamma-Ray Source at the Galactic Center, Astrophys. J. 753 (2012) 41 [arXiv:1203.3539] [INSPIRE].
[10] D. Horns, TeV gamma-radiation from dark matter annihilation in the Galactic center, Phys. Lett. B 607 (2005) 225 [Erratum ibid. B 611 (2005) 297] [astro-ph/0408192] [INSPIRE].
[11] L. Bergstrom, T. Bringmann, M. Eriksson and M. Gustafsson, Gamma rays from Kaluza-Klein dark matter, Phys. Rev. Lett. 94 (2005) 131301 [astro-ph/0410359] [INSPIRE]; Gamma rays from heavy neutralino dark matter, Phys. Rev. Lett. 95 (2005) 241301 [hep-ph/0507229] [INSPIRE].
[12] S. Profumo, TeV gamma-rays and the largest masses and annihilation cross sections of neutralino dark matter, Phys. Rev. D 72 (2005) 103521 [astro-ph/0508628] [INSPIRE].
[13] HESS collaboration, F. Aharonian et al., H.E.S.S. observations of the Galactic Center region and their possible dark matter interpretation, Phys. Rev. Lett. 97 (2006) 221102 [Erratum ibid. 97 (2006) 249901] [astro-ph/0610509] [INSPIRE].
[14] F. Aharonian and A. Neronov, High energy gamma rays from the massive black hole in the Galactic center, Astrophys. J. 619 (2005) 306 [astro-ph/0408303] [INSPIRE].
[15] J. Cembranos, V. Gammaldi and A. Maroto, Possible dark matter origin of the gamma ray emission from the galactic center observed by HESS, Phys. Rev. D 86 (2012) 103506 [arXiv:1204.0655] [INSPIRE].
[16] A.V. Belikov, G. Zaharijas and J. Silk, Study of the Gamma-ray Spectrum from the Galactic Center in view of Multi-TeV Dark Matter Candidates, Phys. Rev. D 86 (2012) 083516 [arXiv:1207.2412] [INSPIRE].
[17] R.M. Crocker, M. Fatuzzo, R. Jokipii, F. Melia and R.R. Volkas, The AGASA/SUGAR anisotropies and TeV gamma rays from the Galactic Center: A Possible signature of extremely high-energy neutrons, Astrophys. J. 622 (2005) 892 [astro-ph/0408183] [INSPIRE].
[18] Q.D. Wang, F. Lu and E. Gotthelf, G359.95-0.04: pulsar candidate near sgr a*, Mon. Not. Roy. Astron. Soc. 367 (2006) 937 [astro-ph/0512643] [INSPIRE]; B. Aschenbach, N. Grosso, D. Porquet and P. Predehl, X-ray flares reveal mass and angular momentum of the Galactic Center black hole, Astron. Astrophys. 417 (2004) 71 [astro-ph/0401589] [INSPIRE].
[19] A. Atoyan and C.D. Dermer, TeV emission from the Galactic Center black-hole plerion, Astrophys. J. 617 (2004) L123 [astro-ph/0410243] [INSPIRE].
[20] G.R. Blumenthal, S. Faber, R. Flores and J.R. Primack, Contraction of Dark Matter Galactic Halos Due to Baryonic Infall, Astrophys. J. 301 (1986) 27 [INSPIRE]; O.Y. Gnedin, A.V. Kravtsov, A.A. Klypin and D. Nagai, Response of dark matter halos to condensation of baryons: Cosmological simulations and improved adiabatic contraction model, Astrophys. J. 616 (2004) 16 [astro-ph/0406247] [INSPIRE].
[21] F. Prada, A. Klypin, J. Flix Molina, M. Mart´ınez and E. Simonneau, Dark Matter Annihilation in the Milky Way Galaxy: Effects of Baryonic Compression, Phys. Rev. Lett. 93 (2004) 241301 [astro-ph/0401512] [INSPIRE].
[22] E. Romano-D´ıaz, I. Shlosman, Y. Hoffman and C. Heller, Erasing Dark Matter Cusps in Cosmological Galactic Halos with Baryons, Astrophys. J. Lett. 685 (2008) L105 [arXiv:0808.0195]; E. Romano-D´ıaz, I. Shlosman, C. Heller and Y. Hoffman, Dissecting Galaxy Formation: I. Comparison Between Pure Dark Matter and Baryonic Models, Astrophys. J. 702 (2009) 1250 [arXiv:0901.1317] [INSPIRE]; A.V. Maccio’, G. Stinson, C.B. Brook, J. Wadsley, H. Couchman et al., Halo expansion in cosmological hydro simulations: towards a baryonic solution of the cusp/core problem in massive spirals, arXiv:1111.5620 [INSPIRE].
[23] P. Salucci, M.I. Wilkinson, M.G. Walker, G.F. Gilmore, E.K. Grebel et al., Dwarf spheroidal galaxy kinematics and spiral galaxy scaling laws, arXiv:1111.1165 [INSPIRE].
[24] T. Sj¨ostrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 Physics and Manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].
[25] J.F. Navarro, C.S. Frenk and S.D. White, A Universal density profile from hierarchical clustering, Astrophys. J. 490 (1997) 493 [astro-ph/9611107] [INSPIRE].
[26] J. Cembranos, A. de la Cruz-Dombriz, A. Dobado, R. Lineros and A. Maroto, Photon spectra from WIMP annihilation, Phys. Rev. D 83 (2011) 083507 [arXiv:1009.4936] [INSPIRE]; Photon spectra from quark generation by WIMPs, AIP Conf. Proc. 1343 (2011) 595 [arXiv:1011.2137] [INSPIRE]; Fitting formulae for photon spectra from WIMP annihilation, J. Phys. Conf. Ser. 314 (2011) 012063 [arXiv:1012.4473] [INSPIRE]; A. de la Cruz-Dombriz and V. Gammaldi, Dark Matter with Photons, arXiv:1109.5027 [INSPIRE]; http://teorica.fis.ucm.es/PaginaWeb/photon spectra.html.
[27] J. Cohen-Tanugi, M. Pohl, O. Tibolla and E. Nuss, The GeV-band source population in the Galactic-Center region as seen by Fermi Large Area Telescope, in Proc. 31st ICRC (Lodz) (2009) 645.
[28] K. Griest and M. Kamionkowski, Unitarity Limits on the Mass and Radius of Dark Matter Particles, Phys. Rev. Lett. 64 (1990) 615 [INSPIRE].
[29] J. Alcaraz, J. Cembranos, A. Dobado and A.L. Maroto, Limits on the brane fluctuations mass and on the brane tension scale from electron positron colliders, Phys. Rev. D 67 (2003) 075010 [hep-ph/0212269] [INSPIRE]; L3 collaboration, P. Achard et al., Search for branons at LEP, Phys. Lett. B 597 (2004) 145 [hep-ex/0407017] [INSPIRE]; J. Cembranos, A. Dobado and A.L. Maroto, Brane skyrmions and wrapped states, Phys. Rev. D 65 (2002) 026005 [hep ph/0106322] [INSPIRE]; Branon search in hadronic colliders, Phys. Rev. D 70 (2004) 096001 [hep-ph/0405286] [INSPIRE]; Branon radiative corrections to collider physics and precision observables, Phys. Rev. D 73 (2006) 035008 [hep-ph/0510399] [INSPIRE]; Dark matter clues in the muon anomalous magnetic moment, Phys. Rev. D 73 (2006) 057303 [hep-ph/0507066] [INSPIRE]; Some model-independent phenomenological consequences of flexible brane worlds, J. Phys. A 40 (2007) 6631 [hep-ph/0611024] [INSPIRE]. J.A. Cembranos, J.L. Diaz-Cruz and L. Prado, Impact of DM direct searches and the LHC analyses on branon phenomenology, Phys. Rev. D 84 (2011) 083522 [arXiv:1110.0542] [INSPIRE].
[30] A. Dobado and A.L. Maroto, The Dynamics of the Goldstone bosons on the brane, Nucl. Phys. B 592 (2001) 203 [hep-ph/0007100] [INSPIRE]; J. Cembranos, A. Dobado and A.L. Maroto, Brane world dark matter, Phys. Rev. Lett. 90 (2003) 241301 [hep-ph/0302041] [INSPIRE]; Cosmological and astrophysical limits on brane fluctuations, Phys. Rev. D 68 (2003) 103505 [hep-ph/0307062] [INSPIRE]; A.L. Maroto, The Nature of branon dark matter, Phys. Rev. D 69 (2004) 043509 [hep-ph/0310272] [INSPIRE]; Brane oscillations and the cosmic coincidence problem, Phys. Rev. D 69 (2004) 101304 [hep-ph/0402278] [INSPIRE]; J. Cembranos, A. Dobado and A.L. Maroto, Dark geometry, Int. J. Mod. Phys. D 13 (2004) 2275 [hep-ph/0405165] [INSPIRE]; J. Cembranos, A. de la Cruz-Dombriz, A. Dobado and A.L. Maroto, Is the CMB Cold Spot a gate to extra dimensions?, JCAP 10 (2008) 039 [arXiv:0803.0694] [INSPIRE].
[31] J. Cembranos, A. de la Cruz-Dombriz, V. Gammaldi and A. Maroto, Detection of branon dark matter with gamma ray telescopes, Phys. Rev. D 85 (2012) 043505 [arXiv:1111.4448] [INSPIRE].
[32] WMAP collaboration, E. Komatsu et al., Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation, Astrophys. J. Suppl. 192 (2011) 18 [arXiv:1001.4538] [INSPIRE].
[33] S. Rudaz and F. Stecker, Cosmic ray anti-protons, positrons and gamma-rays from halo dark matter annihilation, Astrophys. J. 325 (1988) 16 [INSPIRE]; J.A. Cembranos, J.L. Feng, A. Rajaraman and F. Takayama, SuperWIMP solutions to small scale structure problems, Phys. Rev. Lett. 95 (2005) 181301 [hep-ph/0507150] [INSPIRE]; J.A. Cembranos, J.L. Feng and L.E. Strigari, Resolving Cosmic Gamma Ray Anomalies with Dark Matter Decaying Now, Phys. Rev. Lett. 99 (2007) 191301 [arXiv:0704.1658] [INSPIRE]; Exotic Collider Signals from the Complete Phase Diagram of Minimal Universal Extra Dimensions, Phys. Rev. D 75 (2007) 036004 [hep-ph/0612157] [INSPIRE]; J.A. Cembranos and L.E. Strigari, Diffuse MeV Gamma-rays and Galactic 511 keV Line from Decaying WIMP Dark Matter, Phys. Rev. D 77 (2008) 123519 [arXiv:0801.0630] [INSPIRE]; J.A. Cembranos, Dark Matter from R2-gravity, Phys. Rev. Lett. 102 (2009) 141301 [arXiv:0809.1653] [INSPIRE]; The Newtonian limit at intermediate energies, Phys. Rev. D 73 (2006) 064029 [gr-qc/0507039] [INSPIRE]; T. Bringmann and C. Weniger, Gamma Ray Signals from Dark Matter: Concepts, Status and Prospects, Phys. Dark Univ. 1 (2012) 194 [arXiv:1208.5481] [INSPIRE].