6
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Radio Proper Motions of the Energetic Pulsar PSR~J1813\(-\)1749

      Preprint
      ,

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          PSR J1813--1749 has peculiarities that make it a very interesting object of study. It is one of the most energetic and the most scattered pulsar known. It is associated with HESS J1813--178, one of the brightest and most compact TeV sources in the sky. Recently, Ho et al. used archival X-ray Chandra observations separated by more than 10 years and determined that the total proper motion of PSR J1813--1749 is \(\sim66\)~mas~yr\(^{-1}\), corresponding to a velocity of \(\sim\)1900 km s\(^{-1}\) for a distance of 6.2 kpc. These results would imply that this pulsar is the fastest neutron star known in the Galaxy and, by estimating the angular separation with respect to the center of the associated supernova remnant, has an age of only \(\sim300\) years, making it one of the youngest pulsars known. Using archival high-angular-resolution VLA observations taken over 12 years we have estimated the radio proper motions of PSR~J1813--1748 to be much smaller: (\(\mu_{\alpha}\cdot\cos(\delta),\,\mu_\delta\))=(\(-5.0\pm3.7,\,-13.2\pm6.7\))~mas~yr\(^{-1}\), or a total proper motion of \(14.8\pm5.9\)~mas~yr\(^{-1}\). The positions referenced against quasars make our results reliable. We conclude that PSR J1813--1749 is not a very fast moving source. Its kinematic age using the new total proper motion is \(\sim1350\)~years. This age is consistent within a factor of a few with the characteristic age of the pulsar and with the age estimated from the broadband spectral energy distribution of HESS J1813--178, as well as the age of the associated SNR.

          Related collections

          Author and article information

          Journal
          19 October 2021
          Article
          2110.09727
          738072d7-6be2-4d0d-83b7-dea4e5944d0f

          http://creativecommons.org/licenses/by/4.0/

          History
          Custom metadata
          Accepted for publishing in ApJ. 7 pages, 2 figures, 2 tables
          astro-ph.HE

          High energy astrophysical phenomena
          High energy astrophysical phenomena

          Comments

          Comment on this article