| Discovery of a highly energetic pulsar associated with IGR J14003-6326 and a young uncataloged Galactic supernova remnant G310.6-1.6 (2009) | |||||||||
Abstract | |||||||||
| We report the discovery of 31.18 ms pulsations from the INTEGRAL source IGR J14003-6326 using the Rossi X-ray Timing Explorer (RXTE). This pulsar is most likely associated with the bright Chandra X-ray source lying at the center of G310.6-1.6, a previously uncataloged Galactic composite supernova remnant with a bright central non-thermal radio and X-ray nebula, taken to be the pulsar wind nebula. PSR J1400-6325 is amongst the most energetic rotation-powered pulsars in the Galaxy, with a spin-down luminosity of Edot = 5.1E37 erg/s. In the rotating dipole model, the surface dipole magnetic field strength is B_s = 1.1E12 G and the characteristic age tau_c = P/2Pdot = 12.7 kyr. Such a high spin-down power is consistent with the hard spectral indexes of the pulsar and the nebula of 1.22+/-0.15 and 1.83+/-0.08, respectively, and a 2-10 keV flux ratio F_PWN/F_PSR ~ 8. A multi-wavelength study of this new composite supernova remnant, from radio to very-high energy gamma-rays, suggests a very young (< 1000 yr) system, and most likely distant (> 6 kpc), formed by a sub-energetic (~ 1E50 ergs), low ejecta mass (M_ej ~ 3 Msun) SN explosion that occurred in a low-density environment (n_0 ~ 0.01 cm-3). We conclude that G310.6-1.6 harbors a very energetic X-ray pulsar, but not detected so far with Fermi in the GeV domain.. Comment: 7 pages, 4 figures, 2 tables, LaTeX, emulateapj style. Submitted to the Astrophysical Journal | |||||||||
Details der Publikation | |||||||||
| |||||||||