VERITAS Deep Observations of the Dwarf Spheroidal Galaxy Segue 1
Abstract
The VERITAS array of Cherenkov telescopes has carried out a deep observational program on the nearby dwarf spheroidal galaxy Segue 1. We report on the results of nearly 48 hours of good quality selected data, taken between January 2010 and May 2011. No significant -ray emission is detected at the nominal position of Segue 1, and upper limits on the integrated flux are derived. According to recent studies, Segue 1 is the most dark matter-dominated dwarf spheroidal galaxy currently known. We derive stringent bounds on various annihilating and decaying dark matter particle models. The upper limits on the velocity-weighted annihilation cross-section are \mathrm{<\sigma v >^{95% CL} \lesssim 10^{-23} cm^{3} s^{-1}}, improving our limits from previous observations of dwarf spheroidal galaxies by at least a factor of two for dark matter particle masses . The lower limits on the decay lifetime are at the level of \mathrm{\tau^{95% CL} \gtrsim 10^{24} s}. Finally, we address the interpretation of the cosmic ray lepton anomalies measured by ATIC and PAMELA in terms of dark matter annihilation, and show that the VERITAS observations of Segue 1 disfavor such a scenario.
Keywords
Cite
@article{arxiv.1202.2144,
title = {VERITAS Deep Observations of the Dwarf Spheroidal Galaxy Segue 1},
author = {E. Aliu and S. Archambault and T. Arlen and T. Aune and M. Beilicke and W. Benbow and A. Bouvier and S. M. Bradbury and J. H. Buckley and V. Bugaev and K. Byrum and A. Cannon and A. Cesarini and J. L. Christiansen and L. Ciupik and E. Collins-Hughes and M. P. Connolly and W. Cui and G. Decerprit and R. Dickherber and J. Dumm and M. Errando and A. Falcone and Q. Feng and F. Ferrer and J. P. Finley and G. Finnegan and L. Fortson and A. Furniss and N. Galante and D. Gall and S. Godambe and S. Griffin and J. Grube and G. Gyuk and D. Hanna and J. Holder and H. Huan and G. Hughes and T. B. Humensky and P. Kaaret and N. Karlsson and M. Kertzman and Y. Khassen and D. Kieda and H. Krawczynski and F. Krennrich and K. Lee and A. S Madhavan and G. Maier and P. Majumdar and S. McArthur and A. McCann and P. Moriarty and R. Mukherjee and R. A. Ong and M. Orr and A. N. Otte and N. Park and J. S. Perkins and M. Pohl and H. Prokoph and J. Quinn and K. Ragan and L. C. Reyes and P. T. Reynolds and E. Roache and H. J. Rose and J. Ruppel and D. B. Saxon and M. Schroedter and G. H. Sembroski and G. D. Senturk and C. Skole and A. W. Smith and D. Staszak and I. Telezhinsky and G. Tesic and M. Theiling and S. Thibadeau and K. Tsurusaki and A. Varlotta and V. V. Vassiliev and S. Vincent and M. Vivier and R. G. Wagner and S. P. Wakely and J. E. Ward and T. C. Weekes and A. Weinstein and T. Weisgarber and D. A. Williams and B. Zitzer},
journal= {arXiv preprint arXiv:1202.2144},
year = {2019}
}
Comments
Added recently published erratum at the end of the original article