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https://hdl.handle.net/2440/54002
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Type: | Journal article |
Title: | Observations of the Sagittarius dwarf galaxy by the HESS experiment and search for a dark matter signal |
Author: | Aharonian, F. Akhperjanian, A. Bazer-Bachi, A. Beilicke, M. Benbow, W. Berge, D. Bernlohr, K. Boisson, C. Bolz, O. Borrel, V. Braun, I. Brion, E. Brown, A. Buhler, R. Busching, I. Boutelier, T. Carrigan, S. Chadwick, P. Chounet, L. Coignet, G. et al. |
Citation: | Astroparticle Physics, 2008; 29(1):55-62 |
Publisher: | Elsevier Science BV |
Issue Date: | 2008 |
ISSN: | 0927-6505 1873-2852 |
Statement of Responsibility: | HESS Collaboration. F. Aharonian...G. Rowell...and M. Ward...et al |
Abstract: | Observations of the Sagittarius dwarf spheroidal (Sgr dSph) galaxy were carried out with the H.E.S.S. array of four imaging air Cherenkov telescopes in June 2006. A total of 11 hours of high quality data are available after data selection. There is no evidence for a very high energy gamma-ray signal above the energy threshold at the target position. A 95% C.L. flux limit of 3.6 x 10-12 cm-2s-1 above 250 GeV has been derived. Constraints on the velocity-weighted cross section <sigma v> are calculated in the framework of Dark Matter particle annihilation using realistic models for the Dark Matter halo profile of Sagittarius dwarf galaxy. Two different models have been investigated encompassing a large class of halo types. A 95% C.L. exclusion limit on <sigma v> of the order of 2 x 10-25 cm3s-1 is obtained for a core profile in the 100 GeV - 1 TeV neutralino mass range. |
Keywords: | Gamma-rays: observations Dwarf spheroidal galaxy Dark matter |
Description: | Copyright © 2008. Astropart.Phys. Submitted to Cornell University’s online archive www.arXiv.org in 2008 by Moulin Emmanuel. Post-print sourced from www.arxiv.org. |
DOI: | 10.1016/j.astropartphys.2007.11.007 |
Published version: | http://dx.doi.org/10.1016/j.astropartphys.2007.11.007 |
Appears in Collections: | Aurora harvest Chemistry and Physics publications |
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