Non-detection in a Fermi/LAT observation of AXP 4U 0142+61: magnetars?
arXiv:1009.3620 · doi:10.1088/2041-8205/725/2/L196
Abstract
Significant research in compact stars is currently focused on two kinds of enigmatic sources: anomalous X-ray pulsars (AXPs) and soft gamma-ray repeaters (SGRs). Although AXPs and SGRs are popularly thought to be magnetars, other models (e.g. the accretion model) to understand the observations can still not be ruled out. It is worth noting that a non-detection in a Fermi/LAT observation of AXP 4U 0142+61 has been reported recently by Sasmaz Mus & Gogus. We propose here that Fermi/LAT observations may distinguish between the magnetar model and the accretion model for AXPs and SGRs. We explain how this null observation of AXP 4U 0142+61 favors the accretion model. Future Fermi/LAT observations of AXP 1E 1547.0-5408 and AXP 1E 1048.1-5937 are highly recommended.
10 pages, 3 figures, Accepted for publication in ApJ(Letters)
References in corpus (8)
- Neutron Star Observations: Prognosis for Equation of State Constraints
- The strongest cosmic magnets: Soft Gamma-ray Repeaters and Anomalous X-ray Pulsars
- A Debris Disk Around An Isolated Young Neutron Star
- A low-magnetic-field Soft Gamma Repeater
- Anomalous X-ray pulsars: Persistent States with Fallback Disks
- The superflares of soft Gamma-ray repeatres: giant quakes in solid quark stars?
- AXPs/SGRs: Magnetars or Quark-stars?
- Search for High-Energy Gamma-ray Emission from an Anomalous X-ray Pulsar, 4U 0142+61
Cited by in corpus (13)
- SGRs and AXPs as rotation powered massive white dwarfs
- Wind braking of magnetars
- Magnetic Dipole Moment of SGRs and AXPs Described as Massive and Magnetic White Dwarfs
- Gamma-ray upper limits on magnetars with 6 years of Fermi-LAT observations
- Pulsar braking: magnetodipole vs. wind
- Magnetars and White Dwarf Pulsars
- Magnetars: fact or fiction?
- Soft gamma-ray repeaters and anomalous X-ray pulsars as highly magnetized white dwarfs
- AXPs and SGRs in the outer gap model: confronting Fermi observations
- Searching for PeV neutrinos from photomeson interactions in magnetars
- Hard X-ray emission cutoff in anomalous X-ray pulsar 4U 0142+61 detected by INTEGRAL
- Wind braking of magnetars: to understand magnetar's multiwave radiation properties
- What can Fermi tell us about magnetars?