Searching for Proton Cyclotron Features in Two Magnetar Candidates

Details Searching for Proton Cyclotron Features in Two Magnetar Candidates Searching for Proton Cyclotron Features in Two Magnetar Candidates

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..859s&link_type=abstract

Chandra Proposal ID #03500604

Physics

Chandra Proposal Id #03500604

Scientific paper

Soft gamma-ray repeaters, SGRs, and anomalous X-ray pulsars, AXPs, might contain ``magnetars'', young neutron stars endowed with ultra-high magnetic fields, which shine as X-ray sources by releasing magnetic energy. Models involving accretion are not ruled out yet. For the magnetic fields of magnetars, proton cyclotron features, PCFs, are expected to lie in the X-ray band (E(PCFs) = 0.63 B/(10^{14} G) keV). Model atmosphere calculations predict that PCFs are conspicuous and relatively broad. We propose here to search for PCFs in the X-ray spectrum of a SGR (SGR1900+14) and an AXP (1E1048-59), by exploiting the unique characteristics of the Chandra HETGS and METGS. These observation might provide decisive evidence in favor of the existence of magnetars.

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