Search for gamma-ray emission from DES dwarf spheroidal galaxy candidates with Fermi-LAT data

• Autor(a) principal: Drlica-Wagner, Alex
• Data de Publicação: 2015
• Outros Autores: Albert, Andrea, Bechtol, Keith, Wood, Matthew Dunseth, Strigari, Louis E., Sánchez-Conde, Miguel A., Baldini, Luca, Essig, Rouven, Cohen-Tanugi, Johann, Anderson, Brandon, Bellazzini, Ronaldo, Bloom, Elliott D., Caputo, Regina, Cecchi, Claudia, Charles, Eric Andre, Chiang, James, De Angelis, Alessandro, Funk, Stefan, Fusco, Piergiorgio, Gargano, Fabio, Giglietto, Nico, Giordano, Francesco, Guiriec, Sylvain, Gustafsson, Michael, Kuss, Michael, Loparco, Francesco, Lubrano, Pasquale, Mirabal, N., Mizuno, Tsunefumi, Morselli, Aldo, Ohsugi, Takashi, Orlando, Elena, Persic, Massimo, Raino, Silvia, Spada, Francesca Romana, Suson, Daniel J., Zaharijas, Gabrijela, Zimmer, Stephan, Abbott, Timothy M. C., Allam, Sahar S., Balbinot, Eduardo, Bauer, Anne Hollister, Benoit-Lévy, Aurélien, Bernstein, Rebecca A., Bernstein, Gary M., Bertin, Emmanuel, Brooks, D., Buckley-Geer, Elizabeth, Burke, David Lyle, Carnero Rosell, Aurelio, Castander Serentill, Francisco Javier, Covarrubias, Ricardo A., D'Andrea, Christopher B., Costa, Luiz N. da, DePoy, Darren L., Desai, S., Diehl, H. Thomas, Cunha, Carlos Eduardo, Eifler, Tim, Estrada, Juan, Evrard, August E., Fausti Neto, Angelo, Fernandez, Enrique, Finley, David A., Flaugher, Brenna, Frieman, Joshua A., Gaztañaga, Enrique, Gerdes, David W., Gruen, Daniel, Gruendl, Robert A., Gutierrez, Gaston R., Honscheid, K., Jain, Bhuvnesh, James, David J., Jeltema, Tesla E., Kent, Stephen M., Kron, Richard G., Kuehn, Kyler, Kuropatkin, Nikolay P., Lahav, Ofer, Li, T. S., Luque Canaza, Elmer Fidel, Maia, Marcio Antonio Geimba, Makler, Martín, March, Marisa Cristina, Marshall, Jennifer L., Martini, Paul, Merritt, K. Wyatt, Miller, Christopher J., Miquel, Ramon, Mohr, Joseph J., Neilsen, Eric H., Nord, Brian Dennis, Ogando, Ricardo L.C., Peoples, John, Petravick, Donald L., Pieres, Adriano, Plazas Malagón, Andrés Alejandro, Queiroz, Anna Bárbara de Andrade, Romer, Anita K., Roodman, Aaron, Rykoff, Eli, Sako, Masao, Sanchez-Alvaro, Eusebio, Santiago, Basilio Xavier, Scarpine, Victor Emanuel, Schubnell, Michael, Sevilla Noarbe, Ignacio, Smith, Robert Christopher, Soares-Santos, Marcelle, Sobreira, Flávia, Suchyta, Eric, Swanson, Molly E. C., Tarle, Gregory, Thaler, Jon J., Thomas, D., Tucker, Douglas L., Walker, Alistair, Wechsler, Risa H., Wester, William Carl, Williams, P., Yanny, Brian, Zuntz, J., Fermi LAT Collaboration, DES Collaboration
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/126971
• topic: Matéria escura; Quarks; Leptons pesados; Galaxia; Dark matter; Galaxies: dwarf; Gamma rays: galaxies; Local group

Due to their proximity, high dark-matter (DM) content, and apparent absence of non-thermal processes, Milky Way dwarf spheroidal satellite galaxies (dSphs) are excellent targets for the indirect detection of DM. Recently, eight new dSph candidates were discovered using the first year of data from the Dark Energy Survey (DES). We searched for gamma-ray emission coincident with the positions of these new objects in six years of Fermi Large Area Telescope data. We found no significant excesses of gamma-ray emission. Under the assumption that the DES candidates are dSphs with DM halo properties similar to the known dSphs, we computed individual and combined limits on the velocity-averaged DM annihilation cross section for these new targets. If the estimated DM content of these dSph candidates is confirmed, they will constrain the annihilation cross section to lie below the thermal relic cross section for DM particles with masses 20 GeV annihilating via the bb¯ or τ+τ− channels.