Recent Results on Magnetars
نویسنده
چکیده
Several observations obtained in the last few years indicate that Soft Gamma-ray Repeaters (SGRs) and Anomalous X-ray Pulsars (AXPs) are basically a single class of isolated neutron stars. Their properties are well explained by the magnetar model, based on neutron stars powered by magnetic fields as high as 10–10 G. Here I report some recent results obtained for the transient Soft Gamma-ray Repeater SGR1627–41, that started a new outburst after about 10 years from the previous one, and for the Anomalous X–ray Pulsar 1E 1547.0–5408. The latter source recently showed a remarkable bursting activity, that reinforces the similarity between AXPs and SGRs.
منابع مشابه
Magnetars and Pulsars: a Missing Link
There is growing evidence that soft gamma-ray repeaters (SGRs) and anomalous X-ray pulsars (AXPs) are isolated neutron stars with superstrong magnetic fields, i.e., magnetars, marking them a distinguished species from the conventional species of spindown-powered isolated neutron stars, i.e., radio pulsars. The current arguments in favor of the magnetar interpretation of SGR/AXP phenomenology wi...
متن کاملThe Fundamental Plane for Radio Magnetars
High magnetic fields are a distinguishing feature of neutron stars and the existence of sources (the soft gamma repeaters and the anomalous X-ray pulsars) hosting an ultra-magnetized neutron star (or magnetar) has been recognized in the past few decades. Magnetars are believed to be powered by magnetic energy and not by rotation, as with normal radio pulsars. Until recently, the radio quietness...
متن کاملNeutron Star Envelopes and Thermal Radiation from the Magnetic Surface
The thermal structure of neutron star envelopes is discussed with emphasis on analytic results. Recent progress on the effect of chemical constitution and high magnetic fields on the opacities and the thermal structure is further reviewed in view of the application to pulsar cooling and magnetars.
متن کاملHigh Energy Neutrinos from Magnetars
Magnetars can accelerate cosmic rays to high energies through the unipolar effect, and are also copious soft photon emitters. We show that young, fast-rotating magnetars whose spin and magnetic moment point in opposite directions emit high energy neutrinos from their polar caps through photomeson interactions. We identify a neutrino cut-off band in the magnetar period-magnetic field strength ph...
متن کاملMagnetars: the physics behind observations
Magnetars are the strongest magnets in the present universe and the combination of extreme magnetic field, gravity and density makes them unique laboratories to probe current physical theories (from quantum electrodynamics to general relativity) in the strong field limit. Magnetars are observed as peculiar, burst– active X-ray pulsars, the Anomalous X-ray Pulsars (AXPs) and the Soft Gamma Repea...
متن کاملA Search for New Galactic Magnetars in Archival Chandra and Xmm-newton Observations
We present constraints on the number of Galactic magnetars, which we have established by searching for sources with periodic variability in 506 archival Chandra observations and 441 archival XMMNewton observations of the Galactic plane (|b|<5◦). Our search revealed four sources with periodic variability on time scales of 200–5000 s, all of which are probably accreting white dwarfs. We identify ...
متن کامل