2016ApJ...819..149A

Query : 2016ApJ...819..149A

2016ApJ...819..149A - Astrophys. J., 819, 149 (2016/March-2)

Search for gamma-ray emission from the Coma cluster with six years of Fermi-LAT data.

ACKERMANN M., AJELLO M., ALBERT A., ATWOOD W.B., BALDINI L., BALLET J., BARBIELLINI G., BASTIERI D., BECHTOL K., BELLAZZINI R., BISSALDI E., BLANDFORD R.D., BLOOM E.D., BONINO R., BOTTACINI E., BREGEON J., BRUEL P., BUEHLER R., CALIANDRO G.A., CAMERON R.A., CARAGIULO M., CARAVEO P.A., CASANDJIAN J.M., CAVAZZUTI E., CECCHI C., CHARLES E., CHEKHTMAN A., CHIARO G., CIPRINI S., COHEN-TANUGI J., CONRAD J., CUTINI S., D'AMMANDO F., DE ANGELIS A., DE PALMA F., DESIANTE R., DIGEL S.W., DI VENERE L., DRELL P.S., FAVUZZI C., FEGAN S.J., FUKAZAWA Y., FUNK S., FUSCO P., GARGANO F., GASPARRINI D., GIGLIETTO N., GIORDANO F., GIROLETTI M., GODFREY G., GREEN D., GRENIER I.A., GUIRIEC S., HAYS E., HEWITT J.W., HORAN D., JOHANNESSON G., KUSS M., LARSSON S., LATRONICO L., LI J., LI L., LONGO F., LOPARCO F., LOVELLETTE M.N., LUBRANO P., MADEJSKI G.M., MALDERA S., MANFREDA A., MAYER M., MAZZIOTTA M.N., MICHELSON P.F., MITTHUMSIRI W., MIZUNO T., MONZANI M.E., MORSELLI A., MOSKALENKO I.V., MURGIA S., NUSS E., OHSUGI T., ORIENTI M., ORLANDO E., ORMES J.F., PANEQUE D., PESCE-ROLLINS M., PETROSIAN V., PIRON F., PIVATO G., PORTER T.A., RAINO S., RANDO R., RAZZANO M., REIMER A., REIMER O., SANCHEZ-CONDE M., SGRO C., SISKIND E.J., SPADA F., SPANDRE G., SPINELLI P., TAJIMA H., TAKAHASHI H., THAYER J.B., TIBALDO L., TORRES D.F., TOSTI G., TROJA E., VIANELLO G., WOOD K.S., ZIMMER S. (The Fermi-LAT Collaboration) and REPHAELI Y.

Abstract (from CDS):

We present results from γ-ray observations of the Coma cluster incorporating six years of Fermi-LAT data and the newly released "Pass 8" event-level analysis. Our analysis of the region reveals low-significance residual structures within the virial radius of the cluster that are too faint for a detailed investigation with the current data. Using a likelihood approach that is free of assumptions on the spectral shape we derive upper limits on the γ-ray flux that is expected from energetic particle interactions in the cluster. We also consider a benchmark spatial and spectral template motivated by models in which the observed radio halo is mostly emission by secondary electrons. In this case, the median expected and observed upper limits for the flux above 100 MeV are 1.7 x 10–9 ph cm–2 s–1 and 5.2 x 10–9 ph cm–2 s–1 respectively (the latter corresponds to residual emission at the level of 1.8σ). These bounds are comparable to or higher than predicted levels of hadronic gamma-ray emission in cosmic-ray (CR) models with or without reacceleration of secondary electrons, although direct comparisons are sensitive to assumptions regarding the origin and propagation mode of CRs and magnetic field properties. The minimal expected γ-ray flux from radio and star-forming galaxies within the Coma cluster is roughly an order of magnitude below the median sensitivity of our analysis.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: individual: Coma - gamma rays: galaxies: clusters

Nomenclature: Table 3: xFGL JHHMM.m+DDMM N=4.

Errata: erratum vol. 860, art. 85 (2018)

Simbad objects: 29

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Number of rows : 29
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 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
2 7C 122223.5+213929 Bla 12 24 54.4583146056 +21 22 46.385507388   17.56 17.50 18.2   ~ 770 2
3 RX J1230.2+2518 BLL 12 30 14.0893292232 +25 18 07.136022996   15.6   14.78   ~ 177 1
4 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
5 7C 122915.40+290414.00 BLL 12 31 43.5724342752 +28 47 49.770870684   17.90 17.38     ~ 99 2
6 xFGL J1241.6+3438 gam 12 41.6 +34 39           ~ 1 0
7 xFGL J1245.8+2048 gam 12 45.8 +20 48           ~ 1 0
8 xFGL J1250.9+3117 gam 12 50.9 +31 17           ~ 1 0
9 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1274 0
10 3C 277.3 BLL 12 54 12.0071453880 +27 37 33.952663740   15.94       ~ 379 1
11 7C 1252+2227 BLL 12 54 33.2739157176 +22 11 03.647269968   18.0   17.7   ~ 44 1
12 NGC 4839 BiC 12 57 24.3563164776 +27 29 52.203087132 13.56 13.02 12.06     ~ 482 3
13 AB 66 Bla 12 57 57.23184476 +32 29 29.3264986   19.40 19.17 17.69   ~ 142 1
14 SDSS J125821.45+212351.3 BLL 12 58 21.4555723595 +21 23 51.346858831           ~ 24 1
15 NGC 4869 EmG 12 59 23.3588349024 +27 54 41.731884360 15.03 14.9 13.52 13.292 12.536 ~ 286 0
16 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 12.71 12.27 11.386 ~ 814 3
17 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
18 NAME X Comae Galaxy Sy1 13 00 22.1586482856 +28 24 02.632115520   17.23 16.65     ~ 84 0
19 5C 12.170 QSO 13 01 29.1544244472 +33 37 00.382119168   20.54 20.16     ~ 67 1
20 2MASS J13030321+2433558 BLL 13 03 03.2171262048 +24 33 55.735965792   20.09 19.54 18.2   ~ 84 1
21 US 371 BLL 13 10 28.66385420 +32 20 43.7828340   15.61 15.24 17.91   ~ 917 1
22 7C 1308+2503 BLL 13 10 38.2 +24 48 17           ~ 25 1
23 7C 1312+2404 BLL 13 14 43.8062104200 +23 48 26.782554060 17.15 16.83 16.57 15.4   ~ 99 2
24 [VV2006] J132111.2+221613 Bla 13 21 11.20255812 +22 16 12.1083023   19.59 19.23 19.37   ~ 133 1
25 87GB 132042.1+295714 BLL 13 23 02.587 +29 41 33.36   20.7       ~ 68 1
26 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
27 RX J1326.2+2933 BLL 13 26 14.9932019160 +29 33 30.967995924     18.34     ~ 38 0
28 xFGL J1330.8+2933 gam 13 30.8 +29 33           ~ 1 0
29 ICRF J133307.4+272518 Bla 13 33 07.49072970 +27 25 18.3826301       19.58   ~ 88 1

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