A possible association of the new VHE gamma-ray source HESS J1825--137 with the pulsar wind nebula G18.0--0.7 - Archive ouverte HAL Access content directly
Journal Articles Astronomy and Astrophysics - A&A Year : 2005

A possible association of the new VHE gamma-ray source HESS J1825--137 with the pulsar wind nebula G18.0--0.7

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F.A. Aharonian
  • Function : Author
A.G. Akhperjanian
  • Function : Author
A.R. Bazer-Bachi
  • Function : Author
M. Beilicke
  • Function : Author
W. Benbow
  • Function : Author
D. Berge
K. Bernlohr
  • Function : Author
C. Boisson
O. Bolz
  • Function : Author
V. Borrel
  • Function : Author
I. Braun
  • Function : Author
F. Breitling
  • Function : Author
A.M. Brown
  • Function : Author
P.M. Chadwick
  • Function : Author
R. Cornils
  • Function : Author
L. Costamante
  • Function : Author
H.J. Dickinson
  • Function : Author
L.O'C. Drury
  • Function : Author
G. Dubus
D. Emmanoulopoulos
  • Function : Author
Y. Fuchs
  • Function : Author
S. Funk
  • Function : Author
S. Gillessen
J.F. Glicenstein
  • Function : Author
P. Goret
  • Function : Author
C. Hadjichristidis
  • Function : Author
M. Hauser
  • Function : Author
G. Heinzelmann
  • Function : Author
G. Henri
  • Function : Author
G. Hermann
  • Function : Author
J.A. Hinton
  • Function : Author
W. Hofmann
  • Function : Author
M. Holleran
  • Function : Author
D. Horns
O.C. de Jager
  • Function : Author
B. Khelifi
Nu. Komin
A. Konopelko
  • Function : Author
I.J. Latham
  • Function : Author
R. Le Gallou
  • Function : Author
M. Lemoine-Goumard
N. Leroy
T. Lohse
J.M. Martin
  • Function : Author
A. Marcowith
C. Masterson
  • Function : Author
T.J.L. Mccomb
  • Function : Author
S.J. Nolan
  • Function : Author
A. Noutsos
  • Function : Author
K.J. Orford
  • Function : Author
J.L. Osborne
  • Function : Author
M. Panter
  • Function : Author
G. Pelletier
  • Function : Author
G. Puhlhofer
  • Function : Author
M. Punch
B.C. Raubenheimer
  • Function : Author
M. Raue
  • Function : Author
S.M. Rayner
  • Function : Author
A. Reimer
O. Reimer
  • Function : Author
J. Ripken
  • Function : Author
G. Rowell
V. Sahakian
  • Function : Author
L. Sauge
  • Function : Author
S. Schlenker
  • Function : Author
R. Schlickeiser
  • Function : Author
C. Schuster
  • Function : Author
U. Schwanke
M. Siewert
  • Function : Author
H. Sol
  • Function : Author
D. Spangler
  • Function : Author
R. Steenkamp
  • Function : Author
C. Stegmann
  • Function : Author
C. Venter
H.J. Volk
  • Function : Author
S.J. Wagner
  • Function : Author

Abstract

We report on a possible association of the recently discovered very high-energy $\gamma$-ray source HESS J1825--137 with the pulsar wind nebula (commonly referred to as G 18.0--0.7) of the $2.1\times 10^{4}$ year old Vela-like pulsar PSR B1823--13. HESS J1825--137 was detected with a significance of 8.1 $\sigma$ in the Galactic Plane survey conducted with the H.E.S.S. instrument in 2004. The centroid position of HESS J1825--137 is offset by 11\arcmin south of the pulsar position. \emph{XMM-Newton} observations have revealed X-ray synchrotron emission of an asymmetric pulsar wind nebula extending to the south of the pulsar. We argue that the observed morphology and TeV spectral index suggest that HESS J1825--137 and G 18.0--0.7 may be associated: the lifetime of TeV emitting electrons is expected to be longer compared to the {\it XMM-Newton} X-ray emitting electrons, resulting in electrons from earlier epochs (when the spin-down power was larger) contributing to the present TeV flux. These electrons are expected to be synchrotron cooled, which explains the observed photon index of $\sim 2.4$, and the longer lifetime of TeV emitting electrons naturally explains why the TeV nebula is larger than the X-ray size. Finally, supernova remnant expansion into an inhomogeneous medium is expected to create reverse shocks interacting at different times with the pulsar wind nebula, resulting in the offset X-ray and TeV $\gamma$-ray morphology.

Dates and versions

in2p3-00025035 , version 1 (27-10-2006)

Identifiers

Cite

F.A. Aharonian, A.G. Akhperjanian, A.R. Bazer-Bachi, M. Beilicke, W. Benbow, et al.. A possible association of the new VHE gamma-ray source HESS J1825--137 with the pulsar wind nebula G18.0--0.7. Astronomy and Astrophysics - A&A, 2005, 442, pp.L25-L29. ⟨10.1051/0004-6361:200500180⟩. ⟨in2p3-00025035⟩
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