The dwarf spheroidal satellite galaxies of the Milky Way are some of the most dark-matter-dominated objects known. Due to their proximity, high dark matter content, and lack of astrophysical backgrounds, dwarf spheroidal galaxies are widely considered to be among the most promising targets for the indirect detection of dark matter via gamma rays. Here we report on.-ray observations of 25 Milky Way dwarf spheroidal satellite galaxies based on 4 years of Fermi Large Area Telescope (LAT) data. None of the dwarf galaxies are significantly detected in. rays, and we present.-ray flux upper limits between 500 MeV and 500 GeV. We determine the dark matter content of 18 dwarf spheroidal galaxies from stellar kinematic data and combine LAT observations of 15 dwarf galaxies to constrain the dark matter annihilation cross section. We set some of the tightest constraints to date on the annihilation of dark matter particles with masses between 2 GeV and 10 TeV into prototypical standard model channels. We find these results to be robust against systematic uncertainties in the LAT instrument performance, diffuse.-ray background modeling, and assumed dark matter density profile.
Dark matter constraints from observations of 25 Milky Way satellite galaxies with the Fermi Large Area Telescope / Ackermann M; Albert A; Anderson B; Baldini L; Ballet J; Barbiellini G; Bastieri D; Bechtol K; Bellazzini R; Bissaldi E; Bloom ED; Bonamente E; Bouvier A; Brandt TJ; Bregeon J; Brigida M; Bruel P; Buehler R; Buson S; Caliandro GA; Cameron RA; Caragiulo M; Caraveo PA; Cecchi C; Charles E; Chekhtman A; Chiang J; Ciprini S; Claus R; Cohen-Tanugi J; Conrad J; DAmmando F; de Angelis A; Dermer CD; Digel SW; Silva EDE; Drell PS; Drlica-Wagner A; Essig R; Favuzzi C; Ferrara EC; Franckowiak A; Fukazawa Y; Funk S; Fusco P; Gargano F; Gasparrini D; Giglietto N; Giroletti M; Godfrey G; Gomez-Vargas GA; Grenier IA; Guiriec S; Gustafsson M; Hayashida M; Hays E; Hewitt J; Hughes RE; Jogler T; Kamae T; Knodlseder J; Kocevski D; Kuss M; Larsson S; Latronico L; Garde ML; Longo F; Loparco F; Lovellette MN; Lubrano P; Martinez G; Mayer M; Mazziotta MN; Michelson PF; Mitthumsiri W; Mizuno T; Moiseev AA; Monzani ME; Morselli A; Moskalenko IV; Murgia S; Nemmen R; Nuss E; Ohsugi T; Orlando E; Ormes JF; Perkins JS; Piron F; Pivato G; Porter TA; Raino S; Rando R; Razzano M; Razzaque S; Reimer A; Reimer O; Ritz S; Sanchez-Conde M; Sehgal N; Sgro C; Siskind EJ; Spinelli P; Strigari L; Suson DJ; Tajima H; Takahashi H; Thayer JB; Tibaldo L; Tinivella M; Torres DF; Uchiyama Y; Usher TL; Vandenbroucke J; Vianello G; Vitale V; Werner M; Winer BL; Wood KS; Wood M; Zaharijas G; Zimmer S. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - STAMPA. - 89:4(2014), pp. 042001.1-042001.22. [10.1103/PhysRevD.89.042001]
Dark matter constraints from observations of 25 Milky Way satellite galaxies with the Fermi Large Area Telescope
D'AMMANDO, FILIPPO;
2014
Abstract
The dwarf spheroidal satellite galaxies of the Milky Way are some of the most dark-matter-dominated objects known. Due to their proximity, high dark matter content, and lack of astrophysical backgrounds, dwarf spheroidal galaxies are widely considered to be among the most promising targets for the indirect detection of dark matter via gamma rays. Here we report on.-ray observations of 25 Milky Way dwarf spheroidal satellite galaxies based on 4 years of Fermi Large Area Telescope (LAT) data. None of the dwarf galaxies are significantly detected in. rays, and we present.-ray flux upper limits between 500 MeV and 500 GeV. We determine the dark matter content of 18 dwarf spheroidal galaxies from stellar kinematic data and combine LAT observations of 15 dwarf galaxies to constrain the dark matter annihilation cross section. We set some of the tightest constraints to date on the annihilation of dark matter particles with masses between 2 GeV and 10 TeV into prototypical standard model channels. We find these results to be robust against systematic uncertainties in the LAT instrument performance, diffuse.-ray background modeling, and assumed dark matter density profile.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
