2021NatAs...5..465A

Query : 2021NatAs...5..465A

2021NatAs...5..465A - Nature Astronomy, 5, 465-471 (2021)

HAWC observations of the acceleration of very-high-energy cosmic rays in the Cygnus Cocoon.

ABEYSEKARA A.U., ALBERT A., ALFARO R., ALVAREZ C., ANGELES CAMACHO J.R., ARTEAGA-VELAZQUEZ J.C., ARUNBABU K.P., AVILA ROJAS D., AYALA SOLARES H.A., BAGHMANYAN V., BELMONT-MORENO E., BENZVI S.Y., BLANDFORD R., BRISBOIS C., CABALLERO-MORA K.S., CAPISTRAN T., CARRAMINANA A., CASANOVA S., COTTI U., COUTINO DE LEON S., DE LA FUENTE E., DIAZ HERNANDEZ R., DINGUS B.L., DUVERNOIS M.A., DUROCHER M., DIAZ-VELEZ J.C., ELLSWORTH R.W., ENGEL K., ESPINOZA C., FAN K.L., FANG K., FLEISCHHACK H., FRAIJA N., GALVAN-GAMEZ A., GARCIA D., GARCIA-GONZALEZ J.A., GARFIAS F., GIACINTI G., GONZALEZ M.M., GOODMAN J.A., HARDING J.P., HERNANDEZ S., HINTON J., HONA B., HUANG D., HUEYOTL-ZAHUANTITLA F., HUNTEMEYER P., IRIARTE A., JARDIN-BLICQ A., JOSHI V., KIEDA D., LARA A., LEE W.H., LEON VARGAS H., LINNEMANN J.T., LONGINOTTI A.L., LUIS-RAYA G., LUNDEEN J., MALONE K., MARTINEZ O., MARTINEZ-CASTELLANOS I., MARTINEZ-CASTRO J., MATTHEWS J.A., MIRANDA-ROMAGNOLI P., MORALES-SOTO J.A., MORENO E., MOSTAFA M., NAYERHODA A., NELLEN L., NEWBOLD M., NISA M.U., NORIEGA-PAPAQUI R., OLIVERA-NIETO L., OMODEI N., PEISKER A., PEREZ ARAUJO Y., PEREZ-PEREZ E.G., REN Z., RHO C.D., ROSA-GONZALEZ D., RUIZ-VELASCO E., SALAZAR H., SALESA GREUS F., SANDOVAL A., SCHNEIDER M., SCHOORLEMMER H., SERNA F., SMITH A.J., SPRINGER R.W., SURAJBALI P., TOLLEFSON K., TORRES I., TORRES-ESCOBEDO R., URENA-MENA F., WEISGARBER T., WERNER F., WILLOX E., ZEPEDA A., ZHOU H., DE LEON C. and ALVAREZ J.D.

Abstract (from CDS):

Cosmic rays with energies up to a few PeV are known to be accelerated within the Milky Way. Traditionally, it has been presumed that supernova remnants were the main source of these very-high-energy cosmic rays, but theoretically it is difficult to accelerate protons to PeV energies and observationally there simply is no evidence of the remnants being sources of hadrons with energies above a few tens of TeV. One possible source of protons with those energies is the Galactic Centre region. Here, we report observations of 1-100 TeV γ rays coming from the `Cygnus Cocoon', which is a superbubble that surrounds a region of massive star formation. These γ rays are likely produced by 10-1,000 TeV freshly accelerated cosmic rays that originate from the enclosed star-forming region Cyg OB2. Until now it was not known that such regions could accelerate particles to these energies. The measured flux likely originates from hadronic interactions. The spectral shape and the emission profile of the Cocoon changes from GeV to TeV energies, which reveals the transport of cosmic particles and historical activity in the superbubble.

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Journal keyword(s):

Simbad objects: 12

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Number of rows : 12
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 ARGO J2021+4038 gam 20 19 00.0 +40 42 00           ~ 33 1
2 2HWC J2019+367 gam 20 19.8 +36 48           ~ 24 0
3 2HWC J2020+403 gam 20 20.6 +40 22           ~ 7 0
4 PSR J2021+4026 Psr 20 21 30.496 +40 26 53.56           ~ 300 2
5 NGC 6910 OpC 20 23 12.2 +40 46 16           ~ 202 0
6 NAME Cyg X Cld 20 30 04.7973633 +40 51 36.002197           ~ 962 1
7 HAWC J2030+409 gam 20 30.6 +40 56           ~ 5 0
8 HAWC J2031+415 gam 20 31.6 +41 31           ~ 2 0
9 TeV J2032+4130 gam 20 31.7 +41 31           ~ 148 0
10 [MT91] 213 Psr 20 32 13.1247390384 +41 27 24.346666440 13.12 13.08 11.266     B0Vp 334 0
11 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 1023 0
12 NAME Cyg Superbubble PoC 20 47 +41.2           ~ 92 1

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