HESS J1818-154, a new composite supernova remnant discovered in TeV gamma rays and X-rays - Archive ouverte HAL Access content directly
Journal Articles Astronomy and Astrophysics - A&A Year : 2014

HESS J1818-154, a new composite supernova remnant discovered in TeV gamma rays and X-rays

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A. Abramowski
  • Function : Author
F. Aharonian
F. Ait Benkhali
  • Function : Author
A. G. Akhperjanian
  • Function : Author
E. Angüner
  • Function : Author
G. Anton
  • Function : Author
S. Balenderan
  • Function : Author
Agnès Balzer
  • Function : Author
A. Barnacka
  • Function : Author
Y. Becherini
  • Function : Author
J. Becker Tjus
  • Function : Author
K. Bernlöhr
E. Birsin
  • Function : Author
E. Bissaldi
  • Function : Author
J. Biteau
  • Function : Author
M. Böttcher
C. Boisson
J. Bolmont
  • Function : Author
P. Bordas
  • Function : Author
J. Brucker
  • Function : Author
F. Brun
T. Bulik
  • Function : Author
S. Carrigan
  • Function : Author
S. Casanova
M. Cerruti
P. M. Chadwick
  • Function : Author
R. Chalme-Calvet
  • Function : Author
A. Cheesebrough
  • Function : Author
M. Chrétien
  • Function : Author
S. Colafrancesco
  • Function : Author
G. Cologna
  • Function : Author
J. Conrad
  • Function : Author
Y. Cui
  • Function : Author
M. Dalton
  • Function : Author
M. K. Daniel
  • Function : Author
I. D. Davids
  • Function : Author
C. Deil
  • Function : Author
P. de Wilt
  • Function : Author
H. J. Dickinson
  • Function : Author
W. Domainko
  • Function : Author
L. O'C. Drury
  • Function : Author
G. Dubus
K. Dutson
  • Function : Author
J. Dyks
  • Function : Author
M. Dyrda
  • Function : Author
T. Edwards
  • Function : Author
K. Egberts
  • Function : Author
P. Eger
  • Function : Author
C. Farnier
  • Function : Author
S. Fegan
F. Feinstein
  • Function : Author
M. V. Fernandes
  • Function : Author
D. Fernandez
  • Function : Author
A. Fiasson
G. Fontaine
  • Function : Author
A. Förster
  • Function : Author
M. Füssling
  • Function : Author
M. Gajdus
  • Function : Author
G. Giavitto
B. Giebels
  • Function : Author
M. -H. Grondin
  • Function : Author
M. Grudzińska
  • Function : Author
S. Häffner
  • Function : Author
J. Hahn
  • Function : Author
J. Harris
  • Function : Author
G. Heinzelmann
  • Function : Author
G. Henri
  • Function : Author
G. Hermann
  • Function : Author
A. Hillert
  • Function : Author
J. A. Hinton
  • Function : Author
W. Hofmann
  • Function : Author
P. Hofverberg
  • Function : Author
M. Holler
  • Function : Author
D. Horns
A. Jacholkowska
  • Function : Author
C. Jahn
  • Function : Author
M. Jamrozy
M. Janiak
  • Function : Author
F. Jankowsky
  • Function : Author
I. Jung
M. A. Kastendieck
  • Function : Author
K. Katarzynski
  • Function : Author
U. Katz
S. Kaufmann
  • Function : Author
B. Khélifi
Michel Kieffer
  • Function : Author
S. Klepser
D. Klochkov
  • Function : Author
W. Kluźniak
  • Function : Author
T. Kneiske
  • Function : Author
D. Kolitzus
  • Function : Author
S. Krakau
  • Function : Author
P. P. Krüger
  • Function : Author
M. Lemoine-Goumard
J. -P. Lenain
D. Lennarz
  • Function : Author
T. Lohse
A. Lopatin
  • Function : Author
C. -C. Lu
  • Function : Author
V. Marandon
A. Marcowith
R. Marx
N. Maxted
  • Function : Author
M. Mayer
  • Function : Author
T. J. L. Mccomb
  • Function : Author
P. J. Meintjes
  • Function : Author
U. Menzler
  • Function : Author
M. Meyer
  • Function : Author
R. Moderski
  • Function : Author
M. Mohamed
  • Function : Author
T. Murach
M. de Naurois
J. Niemiec
S. J. Nolan
  • Function : Author
L. Oakes
  • Function : Author
S. Ohm
E. de Ona Wilhelmi
  • Function : Author
B. Opitz
  • Function : Author
M. Ostrowski
I. Oya
  • Function : Author
M. Panter
  • Function : Author
R. D. Parsons
  • Function : Author
M. Paz Arribas
  • Function : Author
N. W. Pekeur
  • Function : Author
G. Pelletier
  • Function : Author
J. Perez
  • Function : Author
P. -O. Petrucci
  • Function : Author
H. Poon
  • Function : Author
G. Pühlhofer
  • Function : Author
M. Punch
A. Quirrenbach
  • Function : Author
S. Raab
  • Function : Author
M. Raue
  • Function : Author
A. Reimer
O. Reimer
  • Function : Author
M. Renaud
  • Function : Author
R. de Los Reyes
  • Function : Author
F. Rieger
L. Rob
  • Function : Author
C. Romoli
G. Rowell
B. Rudak
V. Sahakian
  • Function : Author
D. A. Sanchez
  • Function : Author
A. Santangelo
R. Schlickeiser
  • Function : Author
A. Schulz
  • Function : Author
U. Schwanke
S. Schwarzburg
  • Function : Author
S. Schwemmer
  • Function : Author
G. Spengler
  • Function : Author
F. Spies
  • Function : Author
L. Stawarz
  • Function : Author
R. Steenkamp
  • Function : Author
C. Stegmann
  • Function : Author
F. Stinzing
  • Function : Author
K. Stycz
  • Function : Author
I. Sushch
  • Function : Author
A. Szostek
  • Function : Author
A. M. Taylor
  • Function : Author
M. Tluczykont
  • Function : Author
K. Valerius
  • Function : Author
C. van Eldik
B. van Soelen
G. Vasileiadis
  • Function : Author
C. Venter
A. Viana
  • Function : Author
P. Vincent
  • Function : Author
H. J. Völk
  • Function : Author
F. Volpe
  • Function : Author
M. Vorster
  • Function : Author
T. Vuillaume
  • Function : Author
S. J. Wagner
  • Function : Author
P. Wagner
  • Function : Author
M. Ward
  • Function : Author
M. Weidinger
  • Function : Author
Q. Weitzel
  • Function : Author
R. White
  • Function : Author
A. Wierzcholska
P. Willmann
  • Function : Author
A. Wörnlein
  • Function : Author
V. Zabalza
  • Function : Author
M. Zacharias
A. Zajczyk
  • Function : Author
A. A. Zdziarski
  • Function : Author
A. Zech
H. -S. Zechlin
  • Function : Author

Abstract

Composite supernova remnants (SNRs) constitute a small subclass of remnants of massive stellar explosions where non-thermal radiation is observed from both the expanding shell-like shock front and from a pulsar wind nebula (PWN) located inside of the SNR. These systems represent a unique evolutionary phase of SNRs where observations in the radio, X-ray and gamma-ray regimes allow the study of the co-evolution of both of these energetic phenomena. In this article, we report results from observations of the shell-type SNR G15.4+0.1 performed with the High Energy Stereoscopic System (H.E.S.S.) and XMM-Newton. A compact TeV gamma-ray source, HESSJ1818-154, located in the center and contained within the shell of G15.4+0.1 is detected by H.E.S.S. featuring a spectrum best represented by a power-law model with a spectral index of $-2.3 \pm 0.3_{stat} \pm 0.2_{sys}$ and an integral flux of F$(>0.42\,\mathrm{TeV}$)=($0.9 \pm 0.3_{\mathrm{stat}} \pm 0.2_{\mathrm{sys}}) \times 10^{-12}$ cm$^{-2}$ s$^{-1}$. Furthermore, a recent observation with XMM-Newton reveals extended X-ray emission strongly peaked in the center of G15.4+0.1. The X-ray source shows indications for an energy-dependent morphology featuring a compact core at energies above 4 keV and more extended emission that fills the entire region within the SNR at lower energies. Together, the X-ray and VHE gamma-ray emission provide strong evidence for the existence of a PWN located inside the shell of G15.4+0.1 and this SNR can therefore be classified as a composite based on these observations. The radio, X-ray and gamma-ray emission from the PWN is compatible with a one-zone leptonic model which requires a low average magnetic field inside the emission region. An unambiguous counterpart to the putative pulsar, thought to power the PWN, has not been detected neither in radio nor in X-ray observations of G15.4+0.1.
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Dates and versions

in2p3-00907620 , version 1 (27-11-2015)

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Cite

A. Abramowski, F. Aharonian, F. Ait Benkhali, A. G. Akhperjanian, E. Angüner, et al.. HESS J1818-154, a new composite supernova remnant discovered in TeV gamma rays and X-rays. Astronomy and Astrophysics - A&A, 2014, 562, pp.A40. ⟨10.1051/0004-6361/201322914⟩. ⟨in2p3-00907620⟩
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