Near IR Astrometry Of Magnetars

Details Near IR Astrometry Of Magnetars Near IR Astrometry Of Magnetars

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21923703t&link_type=abstract

American Astronomical Society, AAS Meeting #219, #237.03

Physics

Optics

Scientific paper

We present precise astrometric measurements of 5 magnetars gathered over a five year baseline to understand the motion and origin of these objects.
The origin of large magnetic fields (B 1014 - 1015 G) in magnetars and the relation between magnetars and the general population of neutrons stars is not well known. Simulations have suggested that the strong magnetic fields in the cores of the progenitor stars would create asymmetries in neutrino emission, leading to higher space velocities ( 1000 km/sec) for this population as compared to `normal' neutron stars ( 200 - 300 km/sec). The direction of motion of these objects can help identify the possible origin (a supernova remnant or a massive-star cluster) which can place constraints on their age and distance.
We used the laser guide star adaptive optics equipped NIRC2 camera on the 10-m Keck telescope to image the target fields with high-resolution in K band. Preliminary results show that magnetars are young objects and do not have kinematics distinct from the general neutron star population.

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