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A nearby recent supernova that ejected the runaway star zeta Oph, the pulsar PSRB1706-16, and 60-Fe found on Earth
Ralph Neuhaeuser, Frank Gießler, Valeri V. Hambaryan
The detection of Myr old Fe on Earth indicates recent nearby core-collapse supernovae. For supernovae in multiple stars, the primary stars may become neutron…
On the compactness of the isolated neutron star RX J0720.4-3125
V. Hambaryan, V. Suleimanov, F. Haberl +4
The data from all observations of RX J0720.4-3125 conducted by XMM-Newton EPIC-pn with the same instrumental setup in 2000-2012 were reprocessed to form a homogenous data set of so…
A Galactic short gamma-ray burst as cause for the 14C peak in AD 774/5
V. V. Hambaryan, R. Neuhaeuser
In the last 3000 yr, one significant and rapid increase in the concentration of 14C in tree rings was observed; it corresponds to a gamma-ray energy input of 7x10^24 erg at Earth w…
Absorption Features in Spectra of Magnetized Neutron Stars
V. Suleimanov, V. Hambaryan, A. Y. Potekhin +4
The X-ray spectra of some magnetized isolated neutron stars (NSs) show absorption features with equivalent widths (EWs) of 50 - 200 eV, whose nature is not yet well known. To expla…
Radiative properties of highly magnetized isolated neutron star surfaces and approximate treatment of absorption features in their spectra
V. Suleimanov, V. V. Hambaryan, A. Y. Potekhin +3
In the X-ray spectra of most X-ray dim isolated neutron stars (XDINSs) absorption features with equivalent widths (EWs) of 50 -- 200 eV are observed. We theoretically investigate d…