Discovery of a Synchrotron Bubble Associated with PSR J1015-5719

Abstract

We report the discovery of a synchrotron nebula, G283.1-0.59, associated with PSR J1015-5719. Radio observations using the Molonglo Observatory Synthesis Telescope and the Australia Telescope Compact Array at 36, 16, 6, and 3 cm reveal a complex morphology. The pulsar is embedded in the "head" of the nebula with fan-shaped diffuse emission. This is connected to a circular bubble of 20" radius and a collimated tail extending over 1'. Polarization measurements show a highly ordered magnetic field in the nebula. It wraps around the edge of the head and shows an azimuthal configuration near the pulsar, then switches direction quasi-periodically near the bubble and in the tail. Together with the flat radio spectrum observed, we suggest that this system is most plausibly a pulsar wind nebula (PWN), with the head as a bow shock that has a low Mach number and the bubble as a shell expanding in a dense environment. The bubble could act as a magnetic bottle trapping the relativistic particles. A comparison with other bow-shock PWNe with higher Mach numbers shows similar structure and B-field geometry, implying that pulsar velocity may not be the most critical factor in determining the properties of these systems. We also derive analytic expressions for the projected standoff distance and shape of an inclined bow shock. It is found that the projected distance is always larger than the true distance in three dimensions. On the other hand, the projected shape is not sensitive to the inclination after rescaling with the projected standoff distance.

arXiv commentAccepted for publication in ApJ, 14 pages, 14 figures

References in corpus (34)

• The Milky Way in Molecular Clouds: A New Complete CO Survey
• HI4PI: A full-sky HI survey based on EBHIS and GASS
• The Interstellar Environment of our Galaxy
• The Evolution and Structure of Pulsar Wind Nebulae
• The Relation Between Optical Extinction and Hydrogen Column Density in the Galaxy
• SUMSS: A Wide-Field Radio Imaging Survey of the Southern Sky. I. Science goals, survey design and instrumentation
• The Australia Telescope Compact Array Broadband Backend (CABB)
• The Molonglo Galactic Plane Survey (MGPS-2): Compact Source Catalogue
• The Parkes multibeam pulsar survey: III. Young pulsars & the discovery and timing of 200 pulsars
• Evidence for alignment of the rotation and velocity vectors in pulsars
• Pulsar Wind Nebulae in the Chandra Era
• Radio emission from Supernova Remnants
• The Southern Galactic Plane Survey: Polarized Radio Continuum Observations and Analysis
• The Molonglo Galactic Plane Survey: I. Overview and Images
• Profile morphology and polarization of young pulsars
• Birth Kick Distributions and the Spin-Kick Correlation of Young Pulsars
• A catalogue of dust clouds in the Galaxy
• Late-time Evolution of Composite Supernova Remnants: Deep Chandra Observations and Hydrodynamical Modeling of a Crushed Pulsar Wind Nebula in SNR G327.1-1.1
• Pulsar Spin--Velocity Alignment: Further Results and Discussion
• Radio Polarization Observations of G319.9-0.7: A Bow-shock Nebula with an Azimuthal Magnetic Field Powered by Pulsar J1509-5850
• Radio polarization maps of shell-type SNRs I. Effects of a random magnetic field component, and thin-shell models
• Chandra Observations of Outflows from PSR J1509-5850
• A statistical approach to radio emission from shell-type SNRs. I. Basic ideas, techniques, and first results
• A Radio Study of the Mouse, G359.23--0.82
• Recently discovered pulsars and unidentified EGRET sources
• Mass-loading of bow shock pulsar wind nebulae
• Analytic Solutions for the Evolution of Radiative Supernova Remnants
• An Extreme Pulsar Tail Protruding from the Frying Pan Supernova Remnant
• Winds, B-Fields, and Magnetotails of Pulsars
• Radio Polarization Observations of the Snail: A Crushed Pulsar Wind Nebula in G327.1-1.1 with a Highly Ordered Magnetic Field
• Self-similar spherical shock solution with sustained energy injection
• Reconstructing the Guitar: Blowing Bubbles with a Pulsar Bow Shock Back Flow
• Magnesium-rich Ejecta in the SNR G284.3$-$1.8 Around the High-Mass Gamma-Ray Binary 1FGL J1018.6$-$5856
• Searching for Debris Disks around Seven Radio Pulsars

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