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Parkes observations for project P885 semester 2018OCTS_04
We propose to observe PSR J1622-4950 and 1E1547.0-5408 weekly, two
of three magnetars known to currently emit radio pulsations, to
track their rotation, flux density, and polarisation. Less frequently
we will monitor XTE J1810-197, which used to emit radio pulsations,
to be on the lookout for its revival - as recently happened with PSR
J1622-4... more950, which turned on in 2017 after more than 2 years dormant!
These observations yield a continuous record of torque, illuminating
the continued release of magnetic energy. Our broader aims are to
develop a better understanding of the dynamical behaviour of magnetar
magnetospheres, and to establish the conditions under which radio
emission takes place therein, in addition to characterising their
variable radio emission in order to place constraints on the emission
mechanisms, which in at least some respects differ from those of
ordinary pulsars. less
Astronomical and Space Sciences not elsewhere classified
01 Oct 2018
01 Apr 2019
Creative Commons Attribution 4.0 International Licence
Camilo, Fernando; Johnston, Simon; Sarkissian, John; Reynolds, John; Scholz, Paul (2018): Parkes observations for project P885 semester 2018OCTS_04. v1. CSIRO. Data Collection.
All Rights (including copyright) CSIRO 2018.
Access to this collection's metadata and/or files (if any) are restricted until 01 Oct 2020.
Australia Telescope National Facility
P885 - Understanding the Remarkable Behaviour of Radio Magnetars
Neutron stars are extreme objects, the size of a city but containing the
mass of the Sun. Pulsars are neutron stars with very strong magnetic
fields that rotate rapidly and emit focused beams of radio waves that we
may detect on Earth once with every turn of the star, in light-house-like
fashion. While the typical pulsar has a magnetic field ... morestrength at its
surface approximately a million million times stronger than Earth's, a
special and rare (only 23 are known) class of neutron stars has a field up
to another factor of 1000 stronger - these are the "magnetars", the most
magnetic objects known in the Universe. Magnetars shine in ways that
are different from those of ordinary pulsars. For many years, despite
careful searches, no magnetar was seen to shine at radio wavelengths.
The objects of our programme are different - they have been established
to emit radio pulses with every turn of the star, detected using the Parkes
64-metre dish. We are now learning more about the characteristics of
this unusual radiation, and through it about radio-emitting magnetars. less
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