The properties of the putative pulsar associated with IGR J18135-1751/HESS J1813-178

Abstract

Context: We investigate the possible theoretical properties of the putative pulsar associated with the pulsar wind nebula IGR J18135-1751/HESS J1813-178 based upon recent gamma-ray observations and archival multi-wavelength observations. Aims: We show that when using the standard equations for magnetic dipole radiation with recent soft gamma-ray observations leads to deriving an extreme set of parameters (magnetic field, period and spin down rate) for the putative pulsar. Alternative scenarios that generate more typical parameter values are explored. Methods: The properties of the putative pulsar are calculated assuming that the 20-100 keV luminosity corresponds to 1% of Edot, that the source is 4.5 kpc away, and that the pulsar age is 300 yrs. This gives P = 0.55 s, Pdot = 3E-11 s/s, and B = 1.28E14 G. This is a very extreme set compared to the population of known pulsars in PWN systems. Using the equations for magnetic dipole losses makes it possible to adjust the initial assumptions to see what is required for a more reasonable set of pulsar parameters. Results: The current measured properties for IGR J18135-1751/HESS J1813-178 (i.e. luminosity, distance, and age) result in extreme properties of the unseen pulsar within the PWN. The simplest method for achieving more reasonable properties for the pulsar is to decouple the spin-down age of the pulsar from the actual age for the system.

arXiv comment4 pages, 1 figure, accepted for publication as a Research Note in Astronomy & Astrophysics

References in corpus (13)

• The Parkes Multibeam Pulsar Survey: I. Observing and Data Analysis Systems, Discovery and Timing of 100 Pulsars
• The H.E.S.S. survey of the Inner Galaxy in very high-energy gamma-rays
• The 3rd IBIS/ISGRI soft gamma-ray survey catalog
• Re-examining the X-Ray versus Spin-Down Luminosity Correlation of Rotation Powered Pulsars
• Proper motion, age and initial spin period of PSR J0538+2817 in S147
• Proper Motion Measurements of Pulsar B1951+32 in the Supernova Remnant CTB 80
• Discovery of a Radio Supernova Remnant and Non-thermal X-rays Coincident with the TeV Source HESS J1813-178
• Heartbeat of the Mouse: a young radio pulsar associated with the axisymmetric nebula G359.23-0.82
• INTEGRAL IGR J18135-1751=HESS J1813-178: A new cosmic high energy accelerator from keV to TeV
• XMM-Newton observations of HESS J1813-178 reveal a composite Supernova remnant
• Discovery of the Putative Pulsar and Wind Nebula Associated with the TeV Gamma-ray Source HESS J1813-178
• INTEGRAL detection of the pulsar wind nebula in PSR J1846-0258
• INTEGRAL observations of TeV plerions

Cited by in corpus (3)

• Initial spin periods of neutron stars in supernova remnants
• INTEGRAL/IBIS 7-year All-Sky Hard X-Ray Survey. Part II: Catalog of Sources
• Discovery of a Highly Energetic X-ray Pulsar Powering HESS J1813-178 in the Young Supernova Remnant G12.82-0.02