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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29472
Title: Discovery of a Synchrotron Bubble Associated with PSR J1015-5719
Authors: Ng, C. -Y.
BANDIERA, Rino 
Hunstead, R. W.
Johnston, S.
Issue Date: 2017
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 842
Issue: 2
First Page: 100
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. <P />
URI: http://hdl.handle.net/20.500.12386/29472
URL: https://iopscience.iop.org/article/10.3847/1538-4357/aa762e
https://arxiv.org/abs/1706.02978
ISSN: 0004-637X
DOI: 10.3847/1538-4357/aa762e
Bibcode ADS: 2017ApJ...842..100N
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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