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2018ApJ...853..154A - Astrophys. J., 853, 154-154 (2018/February-1)

Dark matter limits from dwarf spheroidal galaxies with the HAWC gamma-ray observatory.

ALBERT A., ALFARO R., ALVAREZ C., ALVAREZ J.D., ARCEO R., ARTEAGA-VELAZQUEZ J.C., AVILA ROJAS D., AYALA SOLARES H.A., BAUTISTA-ELIVAR N., BECERRIL A., BELMONT-MORENO E., BENZVI S.Y., BERNAL A., BRAUN J., BRISBOIS C., CABALLERO-MORA K.S., CAPISTRAN T., CARRAMINANA A., CASANOVA S., CASTILLO M., COTTI U., COTZOMI J., COUTINO DE LEON S., DE LEON C., DE LA FUENTE E., DIAZ HERNANDEZ R., DINGUS B.L., DUVERNOIS M.A., DIAZ-VELEZ J.C., ELLSWORTH R.W., ENGEL K., FIORINO D.W., FRAIJA N., GARCIA-GONZALEZ J.A., GARFIAS F., GONZALEZ M.M., GOODMAN J.A., HAMPEL-ARIAS Z., HARDING J.P., HERNANDEZ S., HERNANDEZ-ALMADA A., HONA B., HUNTEMEYER P., IRIARTE A., JARDIN-BLICQ A., JOSHI V., KAUFMANN S., KIEDA D., LAUER R.J., LENNARZ D., LEON VARGAS H., LINNEMANN J.T., LONGINOTTI A.L., LONGO PROPER M., LUIS RAYA G., LUNA-GARCIA R., LOPEZ-COTO R., MALONE K., MARINELLI S.S., MARTINEZ-CASTELLANOS I., MARTINEZ-CASTRO J., MARTINEZ-HUERTA H., MATTHEWS J.A., MIRANDA-ROMAGNOLI P., MORENO E., MOSTAFA M., NELLEN L., NEWBOLD M., NISA M.U., NORIEGA-PAPAQUI R., PELAYO R., PRETZ J., PEREZ-PEREZ E.G., REN Z., RHO C.D., RIVIERE C., ROSA-GONZALEZ D., ROSENBERG M., RUIZ-VELASCO E., SALESA GREUS F., SANDOVAL A., SCHNEIDER M., SCHOORLEMMER H., SINNIS G., SMITH A.J., SPRINGER R.W., SURAJBALI P., TABOADA I., TIBOLLA O., TOLLEFSON K., TORRES I., VIANELLO G., WEISGARBER T., WESTERHOFF S., WOOD J., YAPICI T., YOUNK P.W. and ZHOU H.

Abstract (from CDS):

The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is a wide field of view observatory sensitive to 500 GeV-100 TeV gamma-rays and cosmic rays. It can also perform diverse indirect searches for dark matter annihilation and decay. Among the most promising targets for the indirect detection of dark matter are dwarf spheroidal galaxies. These objects are expected to have few astrophysical sources of gamma-rays but high dark matter content, making them ideal candidates for an indirect dark matter detection with gamma-rays. Here we present individual limits on the annihilation cross section and decay lifetime for 15 dwarf spheroidal galaxies within the field of view, as well as their combined limit. These are the first limits on the annihilation cross section and decay lifetime using data collected with HAWC. We also present the HAWC flux upper limits of the 15 dwarf spheroidal galaxies in half-decade energy bins.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): dark matter - galaxies: dwarf - gamma rays: general - gamma rays: general

Simbad objects: 16

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