Is the Nearby Isolated Neutron Star RX J0720.4-3125 a Magnetar?

Details Is the Nearby Isolated Neutron Star RX J0720.4-3125 a Magnetar? Is the Nearby Isolated Neutron Star RX J0720.4-3125 a Magnetar?

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..840k&link_type=abstract

Chandra Proposal ID #03500195

Astronomy and Astrophysics

Astronomy

Chandra Proposal Id #03500195

Scientific paper

Over the past few years, astronomers and physicists have realized that X-ray spectroscopy of nearby neutron stars can be used to carry out tests of QED and QCD under extreme conditions not accessible to laboratory experimentation. RX J0720.4-3125 is the second brightest nearby neutron star and as such has and can be expected to receive considerable attention. Unfortunately, the nature of the source is unclear: an old magnetar, a weakly magnetized neutron star accreting matter from the ISM, or a middle-aged pulsar. We show how with 29-ks of Chandra time we can determine Pdot at a level to decisively unmask the nature of this important source.

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