2018ApJ...865...57A

Query : 2018ApJ...865...57A

2018ApJ...865...57A - Astrophys. J., 865, 57-57 (2018/September-3)

Observation of anisotropy of TeV cosmic rays with two years of HAWC.

ABEYSEKARA A.U., ALFARO R., ALVAREZ C., ALVAREZ J.D., ARCEO R., ARTEAGA-VELAZQUEZ J.C., AVILA ROJAS D., AYALA SOLARES H.A., BECERRIL A., BELMONT-MORENO E., BENZVI S.Y., BERNAL A., BRAUN J., CABALLERO-MORA K.S., CAPISTRAN T., CARRAMINANA A., CASANOVA S., CASTILLO M., COTTI U., COTZOMI J., DE LEON C., DE LA FUENTE E., DIAZ HERNANDEZ R., DICHIARA S., DINGUS B.L., DUVERNOIS M.A., DIAZ-VELEZ J.C., ENGEL K., FIORINO D.W., FRAIJA N., GARCIA-GONZALEZ J.A., GARFIAS F., GONZALEZ MUNOZ A., GONZALEZ M.M., GOODMAN J.A., HAMPEL-ARIAS Z., HARDING J.P., HERNANDEZ S., HONA B., HUEYOTL-ZAHUANTITLA F., HUI C.M., HUNTEMEYER P., IRIARTE A., JARDIN-BLICQ A., JOSHI V., KAUFMANN S., LARA A., LAUER R.J., LEE W.H., LEON VARGAS H., LONGINOTTI A.L., LUIS-RAYA G., LUNA-GARCIA R., LOPEZ-CAMARA D., LOPEZ-COTO R., LOPEZ-CAMARA D., LOPEZ-COTO R., MALONE K., MARINELLI S.S., MARTINEZ O., MARTINEZ-CASTELLANOS I., MARTINEZ-CASTRO J., MARTINEZ-HUERTA H., MATTHEWS J.A., MIRANDA-ROMAGNOLI P., MORENO E., MOSTAFA M., NAYERHODA A., 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., SEGLAR ARROYO M., SINNIS G., SMITH A.J., SPRINGER R.W., SURAJBALI P., TABOADA I., TIBOLLA O., TOLLEFSON K., TORRES I., VIANELLO G., VILLASENOR L., WEISGARBER T., WERNER F., WESTERHOFF S., WOOD J., YAPICI T., ZEPEDA A. and ZHOU H.

Abstract (from CDS):

After two years of operation, the High-Altitude Water Cherenkov (HAWC) Observatory has analyzed the TeV cosmic-ray sky over an energy range between 2.0 and 72.8 TeV. Like other detectors in the northern and southern hemispheres, HAWC observes an energy-dependent anisotropy in the arrival direction distribution of cosmic rays. This anisotropy is dominated by a dipole moment with phase in R.A. α ≃ 40° and amplitude that slowly rises in relative intensity from 8 x 10–4 at 2 TeV to 14 x 10–4 around 30 TeV, above which the dipole decreases in strength. A significant large-scale (>60° in angular extent) signal is also observed in the quadrupole and octupole moments, and significant small-scale features are also present, with locations and shapes consistent with previous observations. Compared to previous measurements in this energy range, the HAWC cosmic-ray sky maps improve on the energy resolution and fit precision of the anisotropy. These data can be used in an effort to better constrain local cosmic-ray accelerators and the intervening magnetic fields.

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

Journal keyword(s): astroparticle physics - cosmic rays

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
2 NAME Cyg Complex reg 20 32 +45.0           ~ 667 0

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