FERMI LARGE AREA TELESCOPE OBSERVATIONS OF THE SUPERNOVA REMNANT G8.7-0.1

Marco Ajello; A. Allafort; Luca Baldini; Jean Ballet; Guido Barbiellini; D. Bastieri; K. Bechtol; R. Bellazzini; B. Berenji; R. D. Blandford; E. D. Bloom; E. Bonamente; A. W. Borgland; J. Bregeon; M. Brigida; Pascal Bruel; R. Buehler; S. Buson; G. A. Caliandro; R. A. Cameron; P. A. Caraveo; J. M. Casandjian; C. Cecchi; E. Charles; A. Chekhtman; S. Ciprini; R. Claus; J. Cohen-Tanugi; S. Cutini; A. de Angelis; F. de Palma; C. D. Dermer; E. Do Couto E Silva; P. S. Drell; A. Drlica-Wagner; R. Dubois; C. Favuzzi; S. J. Fegan; E. C. Ferrara; W. B. Focke; M. Frailis; Y. Fukazawa; Y. Fukui; P. Fusco; F. Gargano; D. Gasparrini; S. Germani; N. Giglietto; P. Giommi; F. Giordano; M. Giroletti; T. Glanzman; G. Godfrey; J. E. Grove; S. Guiriec; D. Hadasch; Y. Hanabata; A. K. Harding; K. Hayashi; E. Hays; R. Itoh; G. Jóhannesson; A. S. Johnson; T. Kamae; H. Katagiri; J. Kataoka; Jürgen Knödlseder; H. Kubo; M. Kuss; J. Lande; L. Latronico; S.-H. Lee; A. M. Lionetto; F. Longo; F. Loparco; M. N. Lovellette; P. Lubrano; M. N. Mazziotta; J. Mehault; P. F. Michelson; T. Mizuno; A. A. Moiseev; C. Monte; M. E. Monzani; A. Morselli; I. V. Moskalenko; S. Murgia; T. Nakamori; M. Naumann-Godo; S. Nishino; P. L. Nolan; J. P. Norris; E. Nuss; M. Ohno; T. Ohsugi; A. Okumura; N. Omodei; E. Orlando; J. F. Ormes; D. Paneque; D. Parent; V. Pelassa; M. Pesce-Rollins; M. Pierbattista; F. Piron; T.A. Porter; S. Rainò; R. Rando; A. Reimer; O. Reimer; T. Reposeur; M. Roth; H. F.-W. Sadrozinski; C. Sgrò; E. J. Siskind; P. D. Smith; G. Spandre; P. Spinelli; D. J. Suson; H. Tajima; H. Takahashi; T. Tanaka; J. G. Thayer; J. B. Thayer; L. Tibaldo; O. Tibolla; D. F. Torres; G. Tosti; A. Tramacere; E. Troja; Y. Uchiyama; T. Uehara; T. L. Usher; J. Vandenbroucke; A. van Etten; V. Vasileiou; G. Vianello; N. Vilchez; V. Vitale; A. P. Waite; P. Wang; B. L. Winer; K. S. Wood; H. Yamamoto; R. Yamazaki; Z. Yang; H. Yasuda; M. Ziegler; S. Zimmer

doi:10.1088/0004-637X/744/1/80

Journal Articles The Astrophysical Journal Year : 2012

FERMI LARGE AREA TELESCOPE OBSERVATIONS OF THE SUPERNOVA REMNANT G8.7-0.1

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Marco Ajello

Function : Author

A. Allafort

Function : Author

Luca Baldini

Function : Author

Jean Ballet

Function : Author

Astrophysique Interprétation Modélisation

Guido Barbiellini

Function : Author

D. Bastieri

Function : Author

K. Bechtol

Function : Author

R. Bellazzini

Function : Author

B. Berenji

Function : Author

R. D. Blandford

Function : Author

E. D. Bloom

Function : Author

E. Bonamente

Function : Author

A. W. Borgland

Function : Author

J. Bregeon

Function : Author
PersonId : 741214
IdHAL : johan-bregeon
ORCID : 0000-0002-6790-5328
IdRef : 095856943

M. Brigida

Function : Author

Pascal Bruel

Function : Author

Laboratoire Leprince-Ringuet

R. Buehler

Function : Author

S. Buson

Function : Author

G. A. Caliandro

Function : Author

R. A. Cameron

Function : Author

P. A. Caraveo

Function : Author

J. M. Casandjian

Function : Author

Astrophysique Interprétation Modélisation

C. Cecchi

Function : Author

E. Charles

Function : Author

A. Chekhtman

Function : Author

S. Ciprini

Function : Author

R. Claus

Function : Author

J. Cohen-Tanugi

Function : Author
PersonId : 3626
IdHAL : johann-cohen-tanugi
ORCID : 0000-0001-9022-4232
IdRef : 172626544

Laboratoire Univers et Particules de Montpellier

S. Cutini

Function : Author

A. de Angelis

Function : Author

F. de Palma

Function : Author

C. D. Dermer

Function : Author

E. Do Couto E Silva

Function : Author

P. S. Drell

Function : Author

A. Drlica-Wagner

Function : Author

R. Dubois

Function : Author

C. Favuzzi

Function : Author

S. J. Fegan

Function : Author
PersonId : 740343
IdHAL : stephen-fegan
ORCID : 0000-0002-9978-2510
IdRef : 253133149

Laboratoire Leprince-Ringuet

E. C. Ferrara

Function : Author

W. B. Focke

Function : Author

M. Frailis

Function : Author

Y. Fukazawa

Function : Author
PersonId : 760581
ORCID : 0000-0002-0921-8837

Y. Fukui

Function : Author

P. Fusco

Function : Author

F. Gargano

Function : Author

D. Gasparrini

Function : Author

S. Germani

Function : Author

N. Giglietto

Function : Author
PersonId : 755413
ORCID : 0000-0002-9021-2888

P. Giommi

Function : Author

F. Giordano

Function : Author

M. Giroletti

Function : Author

T. Glanzman

Function : Author

G. Godfrey

Function : Author

J. E. Grove

Function : Author

S. Guiriec

Function : Author

D. Hadasch

Function : Author
PersonId : 761675
ORCID : 0000-0001-8663-6461

Y. Hanabata

Function : Author

A. K. Harding

Function : Author

K. Hayashi

Function : Author

E. Hays

Function : Author

R. Itoh

Function : Author

G. Jóhannesson

Function : Author

A. S. Johnson

Function : Author

T. Kamae

Function : Author

H. Katagiri

Function : Author

J. Kataoka

Function : Author

Jürgen Knödlseder

Function : Author
PersonId : 178646
IdHAL : jurgen-knodlseder
ORCID : 0000-0002-0014-7809
IdRef : 069521360

Institut de recherche en astrophysique et planétologie

H. Kubo

Function : Author
PersonId : 759142
ORCID : 0000-0001-9159-9853

M. Kuss

Function : Author

J. Lande

Function : Author

L. Latronico

Function : Author

S.-H. Lee

Function : Author

A. M. Lionetto

Function : Author

F. Longo

Function : Author
PersonId : 755442
ORCID : 0000-0003-2501-2270

F. Loparco

Function : Author

M. N. Lovellette

Function : Author

P. Lubrano

Function : Author

M. N. Mazziotta

Function : Author

J. Mehault

Function : Author

Laboratoire Univers et Particules de Montpellier

P. F. Michelson

Function : Author

T. Mizuno

Function : Author

A. A. Moiseev

Function : Author

C. Monte

Function : Author

M. E. Monzani

Function : Author

A. Morselli

Function : Author

I. V. Moskalenko

Function : Author

S. Murgia

Function : Author

T. Nakamori

Function : Author
PersonId : 760584
ORCID : 0000-0002-7308-2356

M. Naumann-Godo

Function : Author

Astrophysique Interprétation Modélisation

S. Nishino

Function : Author

P. L. Nolan

Function : Author

J. P. Norris

Function : Author

E. Nuss

Function : Author

Laboratoire Univers et Particules de Montpellier

M. Ohno

Function : Author

T. Ohsugi

Function : Author

A. Okumura

Function : Author

N. Omodei

Function : Author

E. Orlando

Function : Author

J. F. Ormes

Function : Author

D. Paneque

Function : Author
PersonId : 755279
ORCID : 0000-0002-2830-0502

D. Parent

Function : Author

V. Pelassa

Function : Author

Laboratoire Univers et Particules de Montpellier

M. Pesce-Rollins

Function : Author
PersonId : 760585
ORCID : 0000-0003-1790-8018

M. Pierbattista

Function : Author

Astrophysique Interprétation Modélisation

F. Piron

Function : Author
PersonId : 172749
IdHAL : frederic-piron
ORCID : 0000-0001-6885-7156

Laboratoire Univers et Particules de Montpellier

T.A. Porter

Function : Author

S. Rainò

Function : Author

R. Rando

Function : Author

A. Reimer

Function : Author
PersonId : 755465
ORCID : 0000-0001-8604-7077

O. Reimer

Function : Author

T. Reposeur

Function : Author
PersonId : 738492
IdHAL : thierry-reposeur
ORCID : 0000-0001-6939-3429
IdRef : 139970665

GLAST

M. Roth

Function : Author

H. F.-W. Sadrozinski

Function : Author

C. Sgrò

Function : Author

E. J. Siskind

Function : Author

P. D. Smith

Function : Author

G. Spandre

Function : Author

P. Spinelli

Function : Author

D. J. Suson

Function : Author

H. Tajima

Function : Author

H. Takahashi

Function : Author

T. Tanaka

Function : Author
PersonId : 756461
ORCID : 0000-0002-4383-0368

J. G. Thayer

Function : Author

J. B. Thayer

Function : Author

L. Tibaldo

Function : Author

O. Tibolla

Function : Author

D. F. Torres

Function : Author

G. Tosti

Function : Author

A. Tramacere

Function : Author

E. Troja

Function : Author

Y. Uchiyama

Function : Author

T. Uehara

Function : Author

T. L. Usher

Function : Author

J. Vandenbroucke

Function : Author

A. van Etten

Function : Author

V. Vasileiou

Function : Author

Laboratoire Univers et Particules de Montpellier

G. Vianello

Function : Author

N. Vilchez

Function : Author

Institut de recherche en astrophysique et planétologie

V. Vitale

Function : Author
PersonId : 760184
ORCID : 0000-0001-8040-7852

A. P. Waite

Function : Author

P. Wang

Function : Author

B. L. Winer

Function : Author

K. S. Wood

Function : Author

H. Yamamoto

Function : Author

R. Yamazaki

Function : Author

Z. Yang

Function : Author

H. Yasuda

Function : Author

M. Ziegler

Function : Author

S. Zimmer

Function : Author

Abstract

We present a detailed analysis of the GeV gamma-ray emission toward the supernova remnant (SNR) G8.7-0.1 with the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope. An investigation of the relationship between G8.7-0.1 and the TeV unidentified source HESS J1804-216 provides us with an important clue on diffusion process of cosmic rays if particle acceleration operates in the SNR. The GeV gamma-ray emission is extended with most of the emission in positional coincidence with the SNR G8.7-0.1 and a lesser part located outside the western boundary of G8.7-0.1. The region of the gamma-ray emission overlaps spatially connected molecular clouds, implying a physical connection for the gamma-ray structure. The total gamma-ray spectrum measured with LAT from 200 MeV-100 GeV can be described by a broken power-law function with a break of 2.4 ± 0.6 (stat) ± 1.2 (sys) GeV, and photon indices of 2.10 ± 0.06 (stat) ± 0.10 (sys) below the break and 2.70 ± 0.12 (stat) ± 0.14 (sys) above the break. Given the spatial association among the gamma rays, the radio emission of G8.7-0.1, and the molecular clouds, the decay of π0s produced by particles accelerated in the SNR and hitting the molecular clouds naturally explains the GeV gamma-ray spectrum. We also find that the GeV morphology is not well represented by the TeV emission from HESS J1804-216 and that the spectrum in the GeV band is not consistent with the extrapolation of the TeV gamma-ray spectrum. The spectral index of the TeV emission is consistent with the particle spectral index predicted by a theory that assumes energy-dependent diffusion of particles accelerated in an SNR. We discuss the possibility that the TeV spectrum originates from the interaction of particles accelerated in G8.7-0.1 with molecular clouds, and we constrain the diffusion coefficient of the particles.

Keywords

acceleration of particles cosmic rays gamma rays: ISM ISM: individual objects (G8.7-0.1 HESS J1804-216) ISM: supernova remnants

Domains

High Energy Astrophysical Phenomena [astro-ph.HE] High Energy Astrophysical Phenomena [astro-ph.HE]

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https://in2p3.hal.science/in2p3-00664467

Submitted on : Monday, February 27, 2012-9:07:36 AM

Last modification on : Friday, August 23, 2024-9:32:04 AM

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in2p3-00664467 , version 1 (27-02-2012)

Identifiers

HAL Id : in2p3-00664467 , version 1
ARXIV : 1109.3017
DOI : 10.1088/0004-637X/744/1/80

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Marco Ajello, A. Allafort, Luca Baldini, Jean Ballet, Guido Barbiellini, et al.. FERMI LARGE AREA TELESCOPE OBSERVATIONS OF THE SUPERNOVA REMNANT G8.7-0.1. The Astrophysical Journal, 2012, 744, pp.80. ⟨10.1088/0004-637X/744/1/80⟩. ⟨in2p3-00664467⟩

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FERMI LARGE AREA TELESCOPE OBSERVATIONS OF THE SUPERNOVA REMNANT G8.7-0.1

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