2018ApJ...853L..29A


Query : 2018ApJ...853L..29A

2018ApJ...853L..29A - Astrophys. J., 853, L29-L29 (2018/February-1)

An indication of anisotropy in arrival directions of ultra-high-energy cosmic rays through comparison to the flux pattern of extragalactic gamma-ray sources.

AAB A., ABREU P., AGLIETTA M., ALBUQUERQUE I.F.M., ALLEKOTTE I., ALMELA A., ALVAREZ CASTILLO J., ALVAREZ-MUNIZ J., ANASTASI G.A., ANCHORDOQUI L., ANDRADA B., ANDRINGA S., ARAMO C., ARSENE N., ASOREY H., ASSIS P., AVILA G., BADESCU A.M., BALACEANU A., BARBATO F., BARREIRA LUZ R.J., BEATTY J.J., BECKER K.H., BELLIDO J.A., BERAT C., BERTAINA M.E., BERTOU X., BIERMANN P.L., BITEAU J., BLAESS S.G., BLANCO A., BLAZEK J., BLEVE C., BOHACOVA M., BONIFAZI C., BORODAI N., BOTTI A.M., BRACK J., BRANCUS I., BRETZ T., BRIDGEMAN A., BRIECHLE F.L., BUCHHOLZ P., BUENO A., BUITINK S., BUSCEMI M., CABALLERO-MORA K.S., CACCIANIGA L., CANCIO A., CANFORA F., CARUSO R., CASTELLINA A., CATALANI F., CATALDI G., CAZON L., CHAVEZ A.G., CHINELLATO J.A., CHUDOBA J., CLAY R.W., COBOS CERUTTI A.C., COLALILLO R., COLEMAN A., COLLICA L., COLUCCIA M.R., CONCEICAO R., CONSOLATI G., CONTRERAS F., COOPER M.J., COUTU S., COVAULT C.E., CRONIN J., D'AMICO S., DANIEL B., DASSO S., DAUMILLER K., DAWSON B.R., DE ALMEIDA R.M., DE JONG S.J., DE MAURO G., DE MELLO NETO J.R.T., DE MITRI I., DE OLIVEIRA J., DE SOUZA V., DEBATIN J., DELIGNY O., DIAZ CASTRO M.L., DIOGO F., DOBRIGKEIT C., D'OLIVO J.C., DOROSTI Q., DOS ANJOS R.C., DOVA M.T., DUNDOVIC A., EBR J., ENGEL R., ERDMANN M., ERFANI M., ESCOBAR C.O., ESPADANAL J., ETCHEGOYEN A., FALCKE H., FARMER J., FARRAR G., FAUTH A.C., FAZZINI N., FENU F., FICK B., FIGUEIRA J.M., FILIPCIC A., FREIRE M.M., FUJII T., FUSTER A., GAIOR R., GARCIA B., GATE F., GEMMEKE H., GHERGHEL-LASCU A., GHIA P.L., GIACCARI U., GIAMMARCHI M., GILLER M., GLAS D., GLASER C., GOLUP G., GOMEZ BERISSO M., GOMEZ VITALE P.F., GONZALEZ N., GORGI A., GRILLO A.F., GRUBB T.D., GUARINO F., GUEDES G.P., HALLIDAY R., HAMPEL M.R., HANSEN P., HARARI D., HARRISON T.A., HAUNGS A., HEBBEKER T., HECK D., HEIMANN P., HERVE A.E., HILL G.C., HOJVAT C., HOLT E., HOMOLA P., HORANDEL J.R., HORVATH P., HRABOVSKY M., HUEGE T., HULSMAN J., INSOLIA A., ISAR P.G., JANDT I., JOHNSEN J.A., JOSEBACHUILI M., JURYSEK J., KAAPA A., KAMBEITZ O., KAMPERT K.H., KEILHAUER B., KEMMERICH N., KEMP E., KEMP J., KIECKHAFER R.M., KLAGES H.O., KLEIFGES M., KLEINFELLER J., KRAUSE R., KROHM N., KUEMPEL D., KUKEC MEZEK G., KUNKA N., KUOTB AWAD A., LAGO B.L., LAHURD D., LANG R.G., LAUSCHER M., LEGUMINA R., LEIGUI DE OLIVEIRA M.A., LETESSIER-SELVON A., LHENRY-YVON I., LINK K., LO PRESTI D., LOPES L., LOPEZ R., LOPEZ CASADO A., LOREK R., LUCE Q., LUCERO A., MALACARI M., MALLAMACI M., MANDAT D., MANTSCH P., MARIAZZI A.G., MARIS I.C., MARSELLA G., MARTELLO D., MARTINEZ H., MARTINEZ BRAVO O., MEZA J.J.M., MATHES H.J., MATHYS S., MATTHEWS J., MATTHIAE G., MAYOTTE E., MAZUR P.O., MEDINA C., MEDINA-TANCO G., MELO D., MENSHIKOV A., MERENDA K.-D., MICHAL S., MICHELETTI M.I., MIDDENDORF L., MIRAMONTI L., MITRICA B., MOCKLER D., MOLLERACH S., MONTANET F., MORELLO C., MORLINO G., MOSTAFA M., MULLER A.L., MULLER G., MULLER M.A., MULLER S., MUSSA R., NARANJO I., NELLEN L., NGUYEN P.H., NICULESCU-OGLINZANU M., NIECHCIOL M., NIEMIETZ L., NIGGEMANN T., NITZ D., NOSEK D., NOVOTNY V., NOZKA L., NUNEZ L.A., OIKONOMOU F., OLINTO A., PALATKA M., PALLOTTA J., PAPENBREER P., PARENTE G., PARRA A., PAUL T., PECH M., PEDREIRA F., PEKALA J., PELAYO R., PENA-RODRIGUEZ J., PEREIRA L.A.S., PERLIN M., PERRONE L., PETERS C., PETRERA S., PHUNTSOK J., PIEROG T., PIMENTA M., PIRRONELLO V., PLATINO M., PLUM M., POH J., POROWSKI C., PRADO R.R., PRIVITERA P., PROUZA M., QUEL E.J., QUERCHFELD S., QUINN S., RAMOS-POLLAN R., RAUTENBERG J., RAVIGNANI D., RIDKY J., RIEHN F., RISSE M., RISTORI P., RIZI V., RODRIGUES DE CARVALHO W., RODRIGUEZ FERNANDEZ G., RODRIGUEZ ROJO J., RONCORONI M.J., ROTH M., ROULET E., ROVERO A.C., RUEHL P., SAFFI S.J., SAFTOIU A., SALAMIDA F., SALAZAR H., SALEH A., SALINA G., SANCHEZ F., SANCHEZ-LUCAS P., SANTOS E.M., SANTOS E., SARAZIN F., SARMENTO R., SARMIENTO-CANO C., SATO R., SCHAUER M., SCHERINI V., SCHIELER H., SCHIMP M., SCHMIDT D., SCHOLTEN O., SCHOVANEK P., SCHRODER F.G., SCHRODER S., SCHULZ A., SCHUMACHER J., SCIUTTO S.J., SEGRETO A., SHADKAM A., SHELLARD R.C., SIGL G., SILLI G., SMIDA R., SNOW G.R., SOMMERS P., SONNTAG S., SORIANO J.F., SQUARTINI R., STANCA D., STANIC S., STASIELAK J., STASSI P., STOLPOVSKIY M., STRAFELLA F., STREICH A., SUAREZ F., SUAREZ DURAN M., SUDHOLZ T., SUOMIJARVI T., SUPANITSKY A.D., SUPIK J., SWAIN J., SZADKOWSKI Z., TABOADA A., TABORDA O.A., THEODORO V.M., TIMMERMANS C., TODERO PEIXOTO C.J., TOMANKOVA L., TOME B., TORRALBA ELIPE G., TRAVNICEK P., TRINI M., ULRICH R., UNGER M., URBAN M., VALDES GALICIA J.F., VALINO I., VALORE L., VAN AAR G., VAN BODEGOM P., VAN DEN BERG A.M., VAN VLIET A., VARELA E., VARGAS CARDENAS B., VAZQUEZ R.A., VEBERIC D., VENTURA C., VERGARA QUISPE I.D., VERZI V., VICHA J., VILLASENOR L., VOROBIOV S., WAHLBERG H., WAINBERG O., WALZ D., WATSON A.A., WEBER M., WEINDL A., WIEDENSKI M., WIENCKE L., WILCZYNSKI H., WIRTZ M., WITTKOWSKI D., WUNDHEILER B., YANG L., YUSHKOV A., ZAS E., ZAVRTANIK D., ZAVRTANIK M., ZEPEDA A., ZIMMERMANN B., ZIOLKOWSKI M., ZONG Z., ZUCCARELLO F. (The Pierre Auger Collaboration)

Abstract (from CDS):

A new analysis of the data set from the Pierre Auger Observatory provides evidence for anisotropy in the arrival directions of ultra-high-energy cosmic rays on an intermediate angular scale, which is indicative of excess arrivals from strong, nearby sources. The data consist of 5514 events above 20 EeV with zenith angles up to 80° recorded before 2017 April 30. Sky models have been created for two distinct populations of extragalactic gamma-ray emitters: active galactic nuclei from the second catalog of hard Fermi-LAT sources (2FHL) and starburst galaxies from a sample that was examined with Fermi-LAT. Flux-limited samples, which include all types of galaxies from the Swift-BAT and 2MASS surveys, have been investigated for comparison. The sky model of cosmic-ray density constructed using each catalog has two free parameters, the fraction of events correlating with astrophysical objects, and an angular scale characterizing the clustering of cosmic rays around extragalactic sources. A maximum-likelihood ratio test is used to evaluate the best values of these parameters and to quantify the strength of each model by contrast with isotropy. It is found that the starburst model fits the data better than the hypothesis of isotropy with a statistical significance of 4.0σ, the highest value of the test statistic being for energies above 39 EeV. The three alternative models are favored against isotropy with 2.7σ-3.2σ significance. The origin of the indicated deviation from isotropy is examined and prospects for more sensitive future studies are discussed.

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

Journal keyword(s): astroparticle physics - cosmic rays - galaxies: active - galaxies: starburst - methods: data analysis - methods: data analysis

Simbad objects: 45

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Number of rows : 45
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3344 2
2 NAME SGP reg 00 51 26.275 -27 07 41.70           ~ 568 0
3 NGC 660 Sy2 01 43 02.350 +13 38 44.45   12.02 11.16     ~ 557 2
4 8C 0149+710 BLL 01 53 25.85101910 +71 15 06.4633311     15.50     ~ 91 1
5 ICRF J021417.9+514451 BLL 02 14 17.9358553848 +51 44 51.945795816     16.50 16.5   ~ 116 1
6 NGC 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1670 2
7 ESO 115-15 Bla 02 31 09.2739335616 -57 55 06.051101592   14.41 15.5 12.63   ~ 43 1
8 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4610 2
9 IC 310 rG 03 16 42.9787569912 +41 19 29.615579544   14.3       ~ 281 2
10 3C 84 Sy2 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4017 3
11 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1808 2
12 IC 342 SBG 03 46 48.514 +68 05 45.98   10.5       ~ 1518 1
13 LEDA 2436236 BLL 06 02 00.4452373872 +53 16 00.045905232           ~ 41 1
14 NGC 2146 SBG 06 18 37.710 +78 21 25.27 11.67 11.38 10.59     ~ 723 2
15 QSO B0625-354 BLL 06 27 06.7286533392 -35 29 15.363665088   14.93       ~ 191 1
16 NGC 2905 H2G 09 32 10.111 +21 30 02.99 10.44 9.75 9.07 8.68   ~ 1119 3
17 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5869 6
18 NGC 3079 Sy2 10 01 57.8789863992 +55 40 47.449758324 11.57 11.54 10.86     ~ 1393 3
19 Mrk 421 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2682 1
20 M 108 SBG 11 11 30.967 +55 40 26.84   10.70       ~ 472 1
21 M 66 GiP 11 20 15.0 +12 59 29 9.85 9.65 8.92     ~ 1387 4
22 NGC 3628 GiP 11 20 17.018 +13 35 22.16   10.42 9.48 9.22   ~ 828 3
23 NGC 3690 IG 11 28 31.0 +58 33 41   13.19 12.86     ~ 978 4
24 6C 113337+702604 BLL 11 36 26.4090783600 +70 09 27.309071232   15.16 14.49 10.51   ~ 368 1
25 NGC 3862 Sy2 11 45 05.00904503 +19 36 22.7409909   14.98 13.97     ~ 604 3
26 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6660 0
27 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7219 3
28 NGC 4631 GiP 12 42 08.009 +32 32 29.44   9.78 9.19 9.10   ~ 1096 2
29 Mrk 231 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 1990 3
30 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1477 2
31 M 63 LIN 13 15 49.2741893928 +42 01 45.728076108   9.34 8.59 8.35   ~ 1224 2
32 NAME Cen A Core PoG 13 25 27.6039817176 -43 01 09.493008456           ~ 37 0
33 NAME Centaurus A Sy2 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4492 3
34 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4333 4
35 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2580 2
36 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1222 2
37 QSO B1514-24 BLL 15 17 41.8134049824 -24 22 19.482207024   15.13 14.00 13.95   ~ 774 3
38 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2963 4
39 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1640 2
40 7C 165211.80+395026.00 BLL 16 53 52.21668403 +39 45 36.6088754 14.09 14.15 13.29 8.26   ~ 2170 2
41 6C 172704+501607 BLL 17 28 18.6242294352 +50 13 10.469553996   16.55 15.97 12.95   ~ 376 1
42 QSO B1959+650 BLL 19 59 59.8520303688 +65 08 54.652536492     12.8 11.21   ~ 628 2
43 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2532 2
44 QSO B2344+514 BLL 23 47 04.8372110928 +51 42 17.877513168     15.50 10.7   ~ 464 0
45 NAME Local Group GrG ~ ~           ~ 8415 0

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