High resolution investigation of possible cyclotron absorption line harmonics from RX J1605.3+3249

Details High resolution investigation of possible cyclotron absorption line harmonics from RX J1605.3+3249 High resolution investigation of possible cyclotron absorption line harmonics from RX J1605.3+3249

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2158p&link_type=abstract

Chandra Proposal ID #08500045

Physics

Chandra Proposal Id #08500045

Scientific paper

RX J1605.3+3249 is member of a class of isolated neutron stars which show a thermal X-ray spectrum. Broad absorption lines in the X-ray spectra of most of these objects were discovered which is interpreted as resonant absorption at the proton cyclotron energy. EPIC-pn spectra show strong evidence for harmonic absorption lines with energy ratios of 2:3:4 with the lowest-energy line at ~400 eV. We propose to use the unique low energy capability of the LETGS in order to confirm the multiple absorption lines and their expected fundamental at 200 eV. The detection of harmonic lines would be unique among the isolated neutron stars with purely thermal emission and extremely important for understanding their underlying physical mechanisms.

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