Searching for Debris Disks around Seven Radio Pulsars

Abstract

We report on our searches for debris disks around seven relatively nearby radio pulsars, which are isolated sources and were carefully selected as the targets on the basis of our deep $K_s$-band imaging survey. The $K_s$ images obtained with the 6.5\,m Baade Magellan Telescope at Las Campanas Observatory are analyzed together with the \textit{Spitzer}/IRAC images at 4.5 and 8.0~$\mu$m and the \textit{WISE} images at 3.4, 4.6, 12 and 22~$\mu$m. No infrared (IR) counterparts of these pulsars are found, with flux upper limits of $\sim \mu$Jy at near-infrared ($\lambda <10\mu$m) and $\sim$10--1000\,$\mu$Jy at mid-infrared wavelengths ($\lambda >10\mu$m). The results of this search are discussed in terms of the efficiency of converting the pulsar spin-down energy to thermal energy and X-ray heating of debris disks, with comparison made to the two magnetars 4U~0142+61 and 1E~2259+586 which are suggested to harbor a debris disk.

7 pages, 2 figures, accepted for publication in ApJ

References in corpus (8)

• A Debris Disk Around An Isolated Young Neutron Star
• New Phase-coherent Measurements of Pulsar Braking Indices
• A Mid-Infrared Counterpart to the Magnetar 1E 2259+586
• A Search for Fallback Disks in Four Young Supernova Remnants
• Spitzer/MIPS Limits on Asteroidal Dust in the Pulsar Planetary System PSR B1257+1
• Interaction and ablation of fall-back disks in isolated neutron stars
• Constraints on fall-back disks in radio pulsars and anomalous X-ray pulsars
• Chandra observation of the relativistic binary J1906+0746

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• Discovery of a Synchrotron Bubble Associated with PSR J1015-5719
• The optical/UV excess of X-ray-dim isolated neutron star II. nonuniformity of plasma on strangeon star surface
• Electromagnetic spin down of a transient accreting millisecond pulsar during quiescence