X-ray nondetection of PSR J0250+5854

Abstract

We conducted a deep XMM$\unicode{x2013}$Newton observing campaign on the 23.5-s radio pulsar PSR J0250+5854 in order to better understand the connection between long-period, radio-emitting neutron stars and their high-energy-emitting counterparts. No X-ray emission was detected resulting in an upper limit in the bolometric luminosity of PSR J0250+5854 of $<$10${}^{31}$ erg s${}^{-1}$ for an assumed blackbody with a temperature of 85 eV, typical of an X-ray Dim Isolated Neutron Star (XDINS). We compared the upper limit in the bolometric luminosity of PSR J0250+5854 with the known population of XDINSs and found that the upper limit is lower than the bolometric luminosity of all but one XDINS. We also compared PSR J0250+5854 with SGR 0418+5729, the magnetar with low dipole magnetic field strength, where the upper limit suggests that if PSR J0250+5854 has a thermal hot spot like SGR 0418+5729, it would have a blackbody temperature of $<$200 eV, compared to 320 eV of the magnetar.

arXiv comment4 pages, 2 figures, accepted by MNRAS

References in corpus (22)

• The Swift X-ray Telescope
• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• Magnetars
• Magnetars: the physics behind observations
• Unifying the observational diversity of isolated neutron stars via magneto-thermal evolution models
• A low-magnetic-field Soft Gamma Repeater
• Magnetars: Properties, Origin and Evolution
• Discovery of a radio emitting neutron star with an ultra-long spin period of 76 seconds
• A radio transient with unusually slow periodic emission
• The Correlation between Dispersion Measure and X-ray Column Density from Radio Pulsars
• The outburst decay of the low magnetic field magnetar SGR 0418+5729
• LOFAR discovery of a 23.5-second radio pulsar
• 3XMM J185246.6+003317: another low magnetic field magnetar
• Is SGR 0418+5729 indeed a waning magnetar ?
• Post-outburst X-ray flux and timing evolution of Swift J1822.3-1606
• Magnetars: a short review and some sparse considerations
• The long-term post-outburst spin down and flux relaxation of magnetar Swift J1822.3$-$1606
• The SUrvey for Pulsars and Extragalactic Radio Bursts IV: Discovery and polarimetry of a 12.1-second radio pulsar
• Thermal and non-thermal X-ray emission from the rotation-powered radio/$\gamma$-ray pulsar PSR J1740+1000
• XMM-Newton observations of PSR J0726-2612, a radio-loud XDINS
• Universal detection of high-temperature emission in X-ray Isolated Neutron Stars
• Two decades of X-ray observations of the isolated neutron star RX J1856.5-3754: detection of thermal and non-thermal hard X-rays and refined spin-down measurement

Cited by in corpus (1)

• 3D evolution of neutron star magnetic-fields from a realistic core-collapse turbulent topology