Spectral and spatial analysis of the dark matter subhalo candidates among Fermi Large Area Telescope unidentified sources
| dc.contributor.author | Coronado-Blázquez, Javier | |
| dc.contributor.author | Sánchez-Conde, Miguel A. | |
| dc.contributor.author | Mauro, Mattia Di | |
| dc.contributor.author | Aguirre-Santaella, Alejandra | |
| dc.contributor.author | Ciucă, Ioana | |
| dc.contributor.author | Domínguez, Alberto | |
| dc.contributor.author | Kawata, Daisuke | |
| dc.contributor.author | Mirabal, Néstor | |
| dc.date.accessioned | 2020-08-28T16:09:52Z | |
| dc.date.available | 2020-08-28T16:09:52Z | |
| dc.date.issued | 2019-11-28 | |
| dc.description.abstract | Fermi-LAT unidentified sources (unIDs) have proven to be compelling targets for performing indirect dark matter (DM) searches. In a previous work, we found that among the 1235 unIDs in Fermi-LAT's catalogs (3FGL, 2FHL and 3FHL) only 44 of those are DM subhalos candidates. We now implement a spectral analysis to test whether these remaining sources are compatible or not with DM origin. This analysis is executed using almost 10 years of Pass 8 Fermi-LAT data. None of the unIDs are found to significantly prefer DM-induced emission compared to other, more conventional, astrophysical sources. In order to discriminate between pulsar and DM sources, we developed a new method which is based on the source's spectral curvature, peak energy, and its detection significance. We also look for spatial extension, which may be a hint for a DM origin according to our N-body simulation studies of the subhalo population. In addition, we used Gaia DR2 data to search for a potential stellar counterpart to our best DM subhalo candidates and, although no firm associations could be found, one of them coincides with the Sagittarius stream. Finally, previous constraints on the DM annihilation cross section are updated with the new number of remaining DM subhalo candidates among unIDs. Our limits now rule out canonical thermal WIMPs up to masses of 10 GeV for bbar b and 20 GeV for τ+τ− annihilation channels, in this way being as sensitive and complementary to those obtained from other targets and probes. | en_US |
| dc.description.sponsorship | The authors would like to thank Jean Ballet and Jan Conrad for their valuable help on the statistical aspects of this work. JCB and MASC are supported by the Atracción de Talento contract no. 2016-T1/TIC1542 granted by the Comunidad de Madrid in Spain. AAS is very grateful to the IFT Centro de Excelencia “Severo Ochoa” Spanish program under reference SEV-2016-0597. MDM acknowledges support by the NASA Fermi Guest Investigator Program 2014 through the Fermi multi-year Large Program N. 81303 (P.I. E. Charles) and by the NASA Fermi Guest Investigator Program 2016 through the Fermi one-year Program N. 91245 (P.I. M. Di Mauro). IC and DK acknowledge the support of the UK’s Science and Technology Facilities Council (ST/N000811/1 and ST/N504488/1). AD thanks the support of the Ramón y Cajal program from the Spanish MINECO. The work of JCB, MASC and AAS was additionally supported by the Spanish Agencia Estatal de Investigación through the grants PGC2018-095161-BI00, IFT Centro de Excelencia Severo Ochoa SEV-2016-0597, and Red Consolider MultiDark FPA2017-90566-REDC. The Fermi LAT Collaboration acknowledges generous ongoing support from a number of agencies and institutes that have supported both the development and the operation of the LAT as well as scientific data analysis. These include the National Aeronautics and Space Administration and the Department of Energy in the United States, the Commissariat ‘a l’Energie Atomique and the Centre National de la Recherche Scientifique / Institut National de Physique Nucléaire et de Physique des Particules in France, the Agenzia Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), High Energy Accelerator Research Organization (KEK) and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish Research Council and the Swedish National Space Board in Sweden. Additional support for science analysis during the operations phase is gratefully acknowledged from the Istituto Nazionale di Astrofisica in Italy and the Centre National d’Etudes Spatiales in France. This work performed in part under DOE Contract DE- AC02-76SF00515. | en_US |
| dc.description.uri | https://iopscience.iop.org/article/10.1088/1475-7516/2019/11/045 | en_US |
| dc.format.extent | 28 pages | en_US |
| dc.genre | journal articles preprints | en_US |
| dc.identifier | doi:10.13016/m2uryy-5fir | |
| dc.identifier.citation | Javier Coronado-Blázquez et al., Spectral and spatial analysis of the dark matter subhalo candidates among Fermi Large Area Telescope unidentified sources, Journal of Cosmology and Astroparticle Physics, Volume 2019 (2019), doi : 10.1088/1475-7516/2019/11/045 | en_US |
| dc.identifier.uri | 10.1088/1475-7516/2019/11/045 | |
| dc.identifier.uri | http://hdl.handle.net/11603/19535 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | IOP | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Physics Department Collection | |
| dc.relation.ispartof | UMBC Faculty Collection | |
| dc.relation.ispartof | UMBC Joint Center for Earth Systems Technology (JCET) | |
| dc.relation.ispartof | UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II) | |
| dc.rights | This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. | |
| dc.rights | This is the version of the article before peer review or editing, as submitted by an author to Journal of Cosmology and Astro particle Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at 10.1088/1475-7516/2019/11/045. | |
| dc.title | Spectral and spatial analysis of the dark matter subhalo candidates among Fermi Large Area Telescope unidentified sources | en_US |
| dc.type | Text | en_US |