Suzaku Observation of HESS J1825$-$137: Discovery of Largely-Extended X-Rays from PSR J1826$-$1334

We observed the brightest part of HESS J1825-137 with the Suzaku XIS, and found diffuse X-rays extending at least up to 15' (~ 17 pc) from the pulsar PSR J1826-1334. The spectra have no emission line, and are fitted with an absorbed power-law model. The X-rays, therefore, are likely due to synchrotron emission from a pulsar wind nebula. The photon index near at the pulsar (r 8.8 times 10^3 km s^{-1}.

[1]  B. Gaensler,et al.  The evolution and structure of pulsar wind nebulae , 2006, astro-ph/0601081.

[2]  M. Turner,et al.  The galactic ridge observed by Exosat , 1985, Nature.

[3]  A. Djannati-Atai,et al.  Implications of HESS Observations of Pulsar , 2008, 0803.0116.

[4]  W. Becker.  Neutron Stars and Pulsars , 2009 .

[5]  K. Koyama,et al.  The 6.7 keV Iron Line Distribution in the Galaxy , 1993 .

[6]  L. Zhang,et al.  Nonthermal Radiation from Pulsar Wind Nebulae , 2008 .

[7]  A. Lyne,et al.  A high-frequency survey of the galactic plane for young and distant pulsars. , 1992 .

[8]  O. Kargaltsev,et al.  Chandra Observation of PSR B1823–13 and Its Pulsar Wind Nebula , 2007, 0707.3529.

[9]  K. Mukai,et al.  Monte Carlo Simulator and Ancillary Response Generator of Suzaku XRT/XIS System for Spatially Extended Source Analysis , 2006, astro-ph/0610118.

[10]  H. Kaneda,et al.  Complex Spectra of the Galactic Ridge X-Rays Observed with ASCA , 1997 .

[11]  F. Marshall,et al.  HEAO 1 measurements of the galactic ridge , 1981 .

[12]  Shunsaku Okada,et al.  The X-Ray Telescope onboard Suzaku , 2007 .

[13]  Yoshitaka Ishisaki,et al.  Reproducibility of Non-X-ray Background for the X-ray Imaging Spectrometer aboard Suzaku , 2008 .

[14]  J. Finley,et al.  The morphology of young neutron stars: PSR B1823-13, its compact nebula, and its interstellar neighborhood , 1996 .

[15]  J. Blondin,et al.  Pulsar Wind Nebulae in Evolved Supernova Remnants , 2001, astro-ph/0107076.

[16]  N. Grevesse,et al.  Abundances of the elements: Meteoritic and solar , 1989 .

[17]  M. Revnivtsev.  Origin Of The Galactic Ridge X-ray Emission: Millions Of Sources , 2006 .

[18]  M. Tsujimoto,et al.  Spectral study of the Galactic ridge X-ray emission with Suzaku: Comparison of the spectral shape with point sources , 2007, Publications of the Astronomical Society of Japan.

[19]  A. Noutsos,et al.  A New Population of Very High Energy Gamma-Ray Sources in the Milky Way , 2005, Science.

[20]  R. Yamazaki,et al.  A Spatial and Spectral Study of Nonthermal Filaments in Historical Supernova Remnants: Observational Results with Chandra , 2004, astro-ph/0411326.

[21]  N. Yamasaki,et al.  Study of the X-Ray Background Spectrum and its Large-Scale Fluctuation with ASCA , 2002, astro-ph/0204224.

[22]  Zhuo Li,et al.  Nonthermal X-Ray Properties of Rotation-powered Pulsars and Their Wind Nebulae , 2007, 0707.4279.

[23]  Furman,et al.  Limits on radio emission from pulsar wind nebulae , 2000, astro-ph/0004273.

[24]  R. Taam,et al.  Pulsar Wind Nebulae and the X-Ray Emission of Nonaccreting Neutron Stars , 2004, astro-ph/0408460.

[25]  Y. Gallant,et al.  New Companions for the lonely Crab? VHE emission from young pulsar wind nebulae revealed by H.E.S.S , 2007, 0710.2247.

[26]  Dan McCammon,et al.  Interstellar photoelectric absorption cross-sections, 0.03-10 keV , 1983 .

[27]  Yasuo Tanaka,et al.  ASCA observation of X-ray emission from the Galactic ridge , 2002 .

[28]  D. Helfand,et al.  New Constraints on the Structure and Evolution of the Pulsar Wind Nebula 3C 58 , 2004, astro-ph/0405380.

[29]  D. Hartmann,et al.  The Milky Way in Molecular Clouds: A New Complete CO Survey , 2000, astro-ph/0009217.

[30]  K. Mitsuda,et al.  Faint X-Ray Sources Resolved in the ASCA Galactic Plane Survey and Their Contribution to the Galactic Ridge X-Ray Emission , 2001, astro-ph/0101093.

[31]  R. Petre,et al.  Evidence for shock acceleration of high-energy electrons in the supernova remnant SN1006 , 1995, Nature.

[32]  D. Liedahl,et al.  Collisional Plasma Models with APEC/APED: Emission-Line Diagnostics of Hydrogen-like and Helium-like Ions , 2001, astro-ph/0106478.

[33]  H. Kaneda,et al.  Unresolved X-Ray Emission from the Galactic Ridge with ASCA , 1996 .

[34]  James M. Cordes,et al.  Pulsar distances and the galactic distribution of free electrons , 1993 .

[35]  V. Kaspi,et al.  XMM-Newton Observations of PSR B1823–13: An Asymmetric Synchrotron Nebula around a Vela-like Pulsar , 2002, astro-ph/0211359.

[36]  W. Goss,et al.  Three Fields Containing Young Pulsars: The Observable Lifetime of Supernova Remnants , 1989 .

[37]  G. Sato,et al.  Chandra Deep X-Ray Observation of a Typical Galactic Plane Region and Near-Infrared Identification , 2005, astro-ph/0507185.

[38]  K. Bernlöhr,et al.  The H.E.S.S. Survey of the Inner Galaxy in Very High Energy Gamma Rays , 2005 .