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- 03/07/05 13:27:59 (20 years ago)
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- trunk/MagicSoft/GC-Proposal
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trunk/MagicSoft/GC-Proposal/GC.tex
r6758 r6759 106 106 107 107 108 In fact, EGRET has detected a strong source in direction of the GC, 3 EG J1745-2852 \cite{GC_egret}, which has a broken power law spectrum extending up to at least 10 GeV, with the index 1.3 below the bread at a few GeV. If in the GC, the gamma ray luminosity of this source is very large $~2 \cdot 10^{37} \mathrm{erg}/\mathrm{s}$, which is equivalent to about 10 Crab pulsars. Up to now, the GC has been observed at energies above 200 GeV by Veritas, Cangaroo and HESS, \cite{GC_whipple,GC_cangaroo,GC_hess}. Figure \ref{fig:GC_gamma_flux} shows the reconstructed spectra by the other IACTs while figure \ref{fig:GC_source_location} shows the different reconstructed positions of the GC source. Recently a second TeV gamma source only about 1 degree away from the Galactic Center has been discovered \cite{SNR_G09+01}. Its integral flux above 200 GeV represents about 2\% of the gamma flux from the Crab nebula .108 In fact, EGRET has detected a strong source in direction of the GC, 3 EG J1745-2852 \cite{GC_egret}, which has a broken power law spectrum extending up to at least 10 GeV, with the index 1.3 below the bread at a few GeV. If in the GC, the gamma ray luminosity of this source is very large $~2 \cdot 10^{37} \mathrm{erg}/\mathrm{s}$, which is equivalent to about 10 Crab pulsars. Up to now, the GC has been observed at energies above 200 GeV by Veritas, Cangaroo and HESS, \cite{GC_whipple,GC_cangaroo,GC_hess}. Figure \ref{fig:GC_gamma_flux} shows the reconstructed spectra by the other IACTs while figure \ref{fig:GC_source_location} shows the different reconstructed positions of the GC source. Recently a second TeV gamma source only about 1 degree away from the Galactic Center has been discovered \cite{SNR_G09+01}. Its integral flux above 200 GeV represents about 2\% of the gamma flux from the Crab nebula with a photon-index of about 2.4. 109 109 110 110 \begin{figure}[h!] … … 154 154 155 155 156 High energy gamma rays can be produced in the GC in the non-thermal radio filaments by high-energy leptons which scatter background infrared photons from the nearby ionized clouds \cite{Pohl1997,Aharonian2005}, or by hadrons colliding with dense matter. These high energy hadrons can be accelerated by the massive black hole \cite{GC_black_hole}, associated with the Sgr A$^*$, supernovae or an energetic pulsar. Alternative mechanisms invoke the hypothetical annihilation of super-symmetric dark matter particles (for a review see \cite{jung96}) or curvature radiation of protons in the vicinity of the central super-massive black hole \cite{GC_black_hole }.156 High energy gamma rays can be produced in the GC in the non-thermal radio filaments by high-energy leptons which scatter background infrared photons from the nearby ionized clouds \cite{Pohl1997,Aharonian2005}, or by hadrons colliding with dense matter. These high energy hadrons can be accelerated by the massive black hole \cite{GC_black_hole}, associated with the Sgr A$^*$, supernovae or an energetic pulsar. Alternative mechanisms invoke the hypothetical annihilation of super-symmetric dark matter particles (for a review see \cite{jung96}) or curvature radiation of protons in the vicinity of the central super-massive black hole \cite{GC_black_hole,Melia2001}. 157 157 158 158 … … 370 370 \section{Acknowledgements} 371 371 372 The authors thank ... is acknowledged.372 The authors thank A. Moralejo for helpfull discussions about the Monte Carlo simulations. 373 373 374 374 -
trunk/MagicSoft/GC-Proposal/bibbib.bib
r6758 r6759 1 @ARTICLE{Melia2001, 2 author = {{Melia}, F. and {Falcke}, H.}, 3 title = "{The Supermassive Black Hole at the Galactic Center}", 4 journal = "Ann. Rev. Astr. Astroph.", 5 year = 2001, 6 volume = 39, 7 pages = {309-352}, 8 adsurl = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2001ARA%26A..39..309M&db_key=AST}, 9 adsnote = {Provided by the NASA Astrophysics Data System} 10 } 11 1 12 @ARTICLE{Hayashida1999, 2 13 author = {{Hayashida}, N. and {Nagano}, M. and {Nishikawa}, D. and {Ohoka}, H. and
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