SEARCHING FOR DARK MATTER ANNIHILATION IN RECENTLY DISCOVERED MILKY WAY SATELLITES WITHFERMI-LAT
| Autor: | Eric H. Neilsen, Gary Bernstein, Martin Crocce, Jennifer L. Marshall, D. A. Finley, Arnauld Albert, E. Bertin, Christopher J. Miller, F. B. Abdalla, E. Suchyta, August E. Evrard, H. T. Diehl, Tim Eifler, J. Carretero, Daniel A. Goldstein, Steve Kent, A. Benoit-Lévy, Mackenna L. Wood, Flavia Sobreira, Alex Drlica-Wagner, Robert Connon Smith, Daniel Gruen, Marcio A. G. Maia, Des Collaborations, D. L. Burke, J. P. Dietrich, Keith Bechtol, Alistair R. Walker, Marcelle Soares-Santos, M. March, Basilio X. Santiago, M. Carrasco Kind, Carlos E. Cunha, Brian Nord, Brandon Anderson, C. B. D'Andrea, B. Flaugher, Manuel Meyer, D. W. Gerdes, Ramon Miquel, Robert A. Gruendl, Kevin Reil, Miguel A. Sánchez-Conde, Gregory Tarle, Ofer Lahav, A. K. Romer, Michael Schubnell, Paul Martini, Fermi-LAT, A. Fausti Neto, David J. Brooks, A. Carnero Rosell, Rebecca A. Bernstein, A. A. Plazas, K. Honscheid, T. M. C. Abbott, Louis E. Strigari, Vinu Vikram, E. J. Sanchez, Ricardo L. C. Ogando, Risa H. Wechsler, Tianjun Li, David J. James, Joshua A. Frieman, Pablo Fosalba, M. E. C. Swanson, E. S. Rykoff, I. Sevilla-Noarbe, N. Kuropatkin, Shantanu Desai, L. N. da Costa, Kyler Kuehn, P. Doel |
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| Přispěvatelé: | Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Fermi-LAT, DES, Institut d'Astrophysique de Paris ( IAP ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) |
| Rok vydání: | 2017 |
| Předmět: |
galaxies [Gamma rays]
[ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph] Flux Astrophysics 01 natural sciences Via láctea Satellite galaxy Matéria escura gamma ray: flux 010303 astronomy & astrophysics QB High Energy Astrophysical Phenomena (astro-ph.HE) Physics education.field_of_study Annihilation scaling galaxies: dwarf gamma ray: emission kinematics Astrophysics - High Energy Astrophysical Phenomena Cosmology and Gravitation Astrophysics::High Energy Astrophysical Phenomena Milky Way satellite Dark matter Population FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics GLAST dark matter cross section: annihilation gamma rays: galaxies 0103 physical sciences Aglomerados globulares Galáxias education STFC Astrophysics::Galaxy Astrophysics background 010308 nuclear & particles physics dark matter: mass gamma ray: flux: upper limit RCUK dark matter: annihilation Astronomy and Astrophysics sensitivity Galaxy dwarf [Galaxies] 13. Climate action Space and Planetary Science galaxy [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Fermi Gamma-ray Space Telescope |
| Zdroj: | Astrophys.J. Astrophys.J., 2017, 834 (2), pp.110. ⟨10.3847/1538-4357/834/2/110⟩ Astrophys.J., 2017, 834 (2), pp.110. 〈10.3847/1538-4357/834/2/110〉 Repositório Institucional da UFRGS Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS NASA Astrophysics Data System Albert, A, Anderson, B, Bechtol, K, Drlica-Wagner, A, Meyer, M J, Sánchez-conde, M, Strigari, L, Wood, M, Abbott, T M C, Abdalla, F B, Benoit-Lévy, A, Bernstein, G M, Bernstein, R A, Bertin, E, Brooks, D, Burke, D L, Rosell, A C, Kind, M C, Carretero, J, Crocce, M, Cunha, C E, D'Andrea, C B, da Costa, L A N, Desai, S, Diehl, T, Dietrich, J P, Doel, P, Eifler, T F, Evrard, A E, Neto, A F, Finley, D A, Flaugher, B, Fosalba, P, Frieman, J, Gerdes, D W, Goldstein, D A, Gruen, D, Gruendl, R A, Honscheid, K, James, D J, Kent, S M, Kuehn, K, Kuropatkin, N, Lahav, O, Li, T S, Maia, M A G, March, M, Marshall, J L, Martini, P, Miller, C J, The Fermi-LAT Collaboration & Dark Energy Survey Collaboration 2017, ' Searching for dark matter annihilation in recently discovered Milky Way Satellites with Fermi-LAT ', The Astrophysical Journal, vol. 834, no. 2, 110 . https://doi.org/10.3847/1538-4357/834/2/110 |
| ISSN: | 1538-4357 0004-637X |
| DOI: | 10.3847/1538-4357/834/2/110 |
| Popis: | We search for excess gamma-ray emission coincident with the positions of confirmed and candidate Milky Way satellite galaxies using 6 years of data from the Fermi Large Area Telescope (LAT). Our sample of 45 stellar systems includes 28 kinematically confirmed dark-matter-dominated dwarf spheroidal galaxies (dSphs) and 17 recently discovered systems that have photometric characteristics consistent with the population of known dSphs. For each of these targets, the relative predicted gamma-ray flux due to dark matter annihilation is taken from kinematic analysis if available, and estimated from a distance-based scaling relation otherwise, assuming that the stellar systems are dark-matter-dominated dSphs. LAT data coincident with four of the newly discovered targets show a slight preference (each ~$2 \sigma$ local) for gamma-ray emission in excess of the background. However, the ensemble of derived gamma-ray flux upper limits for individual targets is consistent with the expectation from analyzing random blank-sky regions, and a combined analysis of the population of stellar systems yields no globally significant excess (global significance $ Comment: 16 pages, 11 figures, accepted for publication in ApJ, public data files and example analysis scripts available at https://www-glast.stanford.edu/pub_data/1203/ |
| Databáze: | OpenAIRE |
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