SEARCH FOR DARK MATTER ANNIHILATION SIGNALS FROM THE FORNAX GALAXY CLUSTER WITH H.E.S.S.
SEARCH FOR DARK MATTER ANNIHILATION SIGNALS FROM THE FORNAX GALAXY CLUSTER WITH H.E.S.S.
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使用 H.E.S.S. 搜索来自 Fornax 星系团的暗物质湮灭信号
DOI:
10.1088/0004-637x/750/2/123
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Abramowski A
中科院分区:
文献类型:
--
作者:
Abramowski A
The Fornax galaxy cluster was observed with the High Energy Stereoscopic System for a total live time of 14.5 hr, searching for very high energy (VHE; E> 100GeV) γ-rays from dark matter (DM) annihilation. No significant signal was found in searches for point-like and extended emissions. Using several models of the DM density distribution, upper limits on the DM velocity-weighted annihilation cross-section< σv> as a function of the DM particle mass are derived. Constraints are derived for different DM particle models, such as those arising from Kaluza–Klein and supersymmetric models. Various annihilation final states are considered. Possible enhancements of the DM annihilation γ-ray flux, due to DM substructures of the DM host halo, or from the Sommerfeld effect, are studied. Additional γ-ray contributions from internal bremsstrahlung and inverse Compton radiation are also discussed. For a DM particle mass of 1 TeV, the exclusion limits at 95% of confidence level reach values of< σv> 95% CL∼ 10− 23 cm 3 s− 1, depending on the DM particle model and halo properties. Additional contribution from DM substructures can improve the upper limits on< σv> by more than two orders of magnitude. At masses around 4.5 TeV, the enhancement by substructures and the Sommerfeld resonance effect results in a velocity-weighted annihilation cross-section upper limit at the level of< σv> 95% CL∼ 10− 26 cm 3 s− 1.
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DOI:
10.1086/587458
发表时间:
2008
期刊:
The Astrophysical Journal
影响因子:
--
作者:
V. Acciari;M. Beilicke;G. Blaylock;S. Bradbury;J. Buckley;V. Bugaev;Y. Butt;O. Celik;A. Cesarini;L. Ciupik;P. Cogan;P. Colin;W. Cui;M. Daniel;C. Duke;T. Ergin;A. Falcone;S. Fegan;J. Finley;G. Finnegan;P. Fortin;L. Fortson;K. Gibbs;G. Gillanders;J. Grube;R. Guenette;G. Gyuk;D. Hanna;E. Hays;J. Holder;D. Horan;S. Hughes;M. Hui;T. Humensky;A. Imran;P. Kaaret;M. Kertzman;D. Kieda;J. Kildea;A. Konopelko;H. Krawczynski;F. Krennrich;M. Lang;S. LeBohec;K. Lee;G. Maier;A. McCann;M. McCutcheon;J. Millis;P. Moriarty;R. Mukherjee;T. Nagai;R. Ong;D. Pandel;J. Perkins;M. Pohl;J. Quinn;K. Ragan;P. Reynolds;H. Rose;M. Schroedter;G. Sembroski;A. Smith;D. Steele;S. Swordy;A. Toner;L. Valcárcel;V. Vassiliev;S. Wakely;J. Ward;T. Weekes;A. Weinstein;R. White;D. Williams;S. Wissel;M. Wood;B. Zitzer
通讯作者:
B. Zitzer
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
Gregory D. Mack;T. Jacques;J. Beacom;N. Bell;H. Yuksel
通讯作者:
H. Yuksel
DOI:
--
发表时间:
2003
期刊:
Maharastra 8
影响因子:
--
作者:
島 岩;島 岩;島 岩;島 岩;SHIMA Iwao;SHIMA Iwao;SHIMA Iwao;SHIMA Iwao;島 岩;島 岩;島 岩;島 岩;島 岩;島 岩;島 岩;SHIMA Iwao
通讯作者:
SHIMA Iwao
影响因子:
3.5
作者:
Abramowski A
通讯作者:
Abramowski A
DOI:
10.1088/0004-637x/738/2/142
发表时间:
2011
期刊:
The Astrophysical Journal
影响因子:
--
作者:
G. Pedaletti;G. Pedaletti;S. Wagner;F. Rieger
通讯作者:
F. Rieger