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Parkes observations for project P874 semester 2014APRS_BPSR_01
We propose to perform a directed search for a pulsed radio-emitting counterpart to the rotation-powered 206-ms X-ray pulsar PSR J1640-4631, recently discovered with the NuSTAR X-ray telescope. This source has a very large spin-down rate, and hence is an excellent and rare candidate for the measurement of the source's “braking index,” a... more fundamental test of the electromagnetic braking hypothesis. A braking index below 2, as has been recently measured for a similar pulsar, would provide further evidence of a connection between pulsars and magnetars. We request time to initially verify this pulsar’s radio detectability, and to perform coherent timing observations that would lead to the aforementioned braking index measurement. If the pulsar is not detected in the initial observations, we will inform the director to withdraw the timing observation portion of our request. less
Astronomical and Space Sciences not elsewhere classified
01 Apr 2014
30 Sep 2014
Creative Commons Attribution 4.0 International Licence
Ferdman, Robert; Kaspi, Victoria ; Gotthelf, Eric (2015): Parkes observations for project P874 semester 2014APRS_BPSR_01. v1. CSIRO. Data Collection.
All Rights (including copyright) CSIRO Australia 2015.
The metadata and files (if any) are available to the public.
Australia Telescope National Facility
P874 - Detecting and timing a pulsed radio counterpart to the recently discovered high magnetic field X-ray pulsar PSR J1640-4631
Pulsars are rapidly rotating neutron star remnants of supernova explosions, spinning on their axes approximately once every second. Shortly after they are formed, pulsars are typically very energetic, and lose rotational energy at a fast rate. A newly discovered young pulsar, called PSR J1640-4631, was discovered by the NuSTAR X-ray space telesco... morepe, which appears to be very young and rotates approximately 5 times per second. It seems to slow down much faster than similar pulsars, and this implies that it may be related to another population of young neutron stars called "magnetars", which have the highest magnetic fields known to exist in the Universe. We are trying to understand the link between the "normal" pulsars and the magnetars; by using the Parkes telescope to monitor this object, we may be able to better characterize its magnetic field and how it is changing, possibly providing further evidence of the connection to magnetars. less
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