2014ApJ...790..152B

Query : 2014ApJ...790..152B

2014ApJ...790..152B - Astrophys. J., 790, 152 (2014/August-1)

Identification of the TeV gamma-ray source ARGO J2031+4157 with the Cygnus cocoon.

BARTOLI B., BERNARDINI P., BI X.J., BRANCHINI P., BUDANO A., CAMARRI P., CAO Z., CARDARELLI R., CATALANOTTI S., CHEN S.Z., CHEN T.L., CRETI P., CUI S.W., DAI B.Z., D'AMONE A., DANZENGLUOBU, DE MITRI I., D'ETTORRE PIAZZOLI B., DI GIROLAMO T., DI SCIASCIO G., FENG C.F., FENG Z., FENG Z., GOU Q.B., GUO Y.Q., HE H.H., HU H., HU H., IACOVACCI M., IUPPA R., JIA H.Y., LABACIREN, LI H.J., LIGUORI G., LIU C., LIU J., LIU M.Y., LU H., MA L.L., MA X.H., MANCARELLA G., MARI S.M., MARSELLA G., MARTELLO D., MASTROIANNI S., MONTINI P., NING C.C., PANAREO M., PERRONE L., PISTILLI P., RUGGIERI F., SALVINI P., SANTONICO R., SHEN P.R., SHENG X.D., SHI F., SURDO A., TAN Y.H., VALLANIA P., VERNETTO S., VIGORITO C., WANG H., WU C.Y., WU H.R., XUE L., YANG Q.Y., YANG X.C., YAO Z.G., YUAN A.F., ZHA M., ZHANG H.M., ZHANG L., ZHANG X.Y., ZHANG Y., ZHAO J., ZHAXICIREN, ZHAXISANGZHU, ZHOU X.X., ZHU F.R., ZHU Q.Q., ZIZZI G. (The ARGO-YBJ Collaboration)

Abstract (from CDS):

The extended TeV gamma-ray source ARGO J2031+4157 (or MGRO J2031+41) is positionally consistent with the Cygnus Cocoon discovered by Fermi-LAT at GeV energies in the Cygnus superbubble. Reanalyzing the ARGO-YBJ data collected from 2007 November to 2013 January, the angular extension and energy spectrum of ARGO J2031+4157 are evaluated. After subtracting the contribution of the overlapping TeV sources, the ARGO-YBJ excess map is fitted with a two-dimensional Gaussian function in a square region of 10°x10°, finding a source extension σext= 1.°8±0.°5. The observed differential energy spectrum is dN/dE = (2.5±0.4)x10–11(E/1 TeV)–2.6±0.3 photons/cm2/s.TeV–1, in the energy range 0.2-10 TeV. The angular extension is consistent with that of the Cygnus Cocoon as measured by Fermi-LAT and the spectrum also shows a good connection with the one measured in the 1-100 GeV energy range. These features suggest to identify ARGO J2031+4157 as the counterpart of the Cygnus Cocoon at TeV energies. The Cygnus Cocoon, located in the star-forming region of Cygnus X, is interpreted as a cocoon of freshly accelerated cosmic rays related to the Cygnus superbubble. The spectral similarity with supernova remnants (SNRs) indicates that the particle acceleration inside a superbubble is similar to that in an SNR. The spectral measurements from 1 GeV to 10 TeV allows for the first time to determine the possible spectrum slope of the underlying particle distribution. A hadronic model is adopted to explain the spectral energy distribution.

Abstract Copyright: ∼

Journal keyword(s): acceleration of particles - cosmic rays - gamma rays: general

Simbad objects: 18

goto Full paper

goto View the references in ADS

Number of rows : 18
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 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
2 IC 443 SNR 06 17 00.0000000 +22 34 11.998901           ~ 1314 1
3 ARGO J1839-0627 Psr 18 40 55.0 -05 33 00           ~ 66 1
4 ARGO J1907+0627 gam 19 08 12.24 +06 23 30.8           ~ 94 0
5 SNR G049.1-00.1 SNR 19 23 19.300 +14 09 21.00           ~ 309 0
6 SNR G074.9+01.2 SNR 20 16 02.4 +37 12 48           ~ 195 2
7 1LHAASO J2018+3643u gam 20 18.6 +36 43           ~ 67 0
8 ARGO J2021+4038 gam 20 19 00.0 +40 42 00           ~ 33 1
9 2HWC J2019+367 gam 20 19.8 +36 48           ~ 24 0
10 NAME gam Cyg SNR SNR 20 20 17.100 +40 26 09.00           ~ 247 2
11 PSR J2021+4026 Psr 20 21 30.496 +40 26 53.56           ~ 300 2
12 NAME Cyg X Cld 20 30 04.7973633 +40 51 36.002197           ~ 962 1
13 TeV J2032+4130 gam 20 31.7 +41 31           ~ 148 0
14 NAME Cyg Complex reg 20 32 +45.0           ~ 667 0
15 [MT91] 213 Psr 20 32 13.1247390384 +41 27 24.346666440 13.12 13.08 11.266     B0Vp 334 0
16 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 1023 0
17 NAME Cyg Superbubble PoC 20 47 +41.2           ~ 92 1
18 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1

To bookmark this query, right click on this link: simbad:objects in 2014ApJ...790..152B and select 'bookmark this link' or equivalent in the popup menu