SIMBAD references

2018ApJ...866...54T - Astrophys. J., 866, 54-54 (2018/October-2)

LOFAR discovery of a 23.5 s radio pulsar.

TAN C.M., BASSA C.G., COOPER S., DIJKEMA T.J., ESPOSITO P., HESSELS J.W.T., KONDRATIEV V.I., KRAMER M., MICHILLI D., SANIDAS S., SHIMWELL T.W., STAPPERS B.W., VAN LEEUWEN J., COGNARD I., GRIESSMEIER J.-M., KARASTERGIOU A., KEANE E.F., SOBEY C. and WELTEVREDE P.

Abstract (from CDS):

We present the discovery of PSR J0250+5854, a radio pulsar with a spin period of 23.5 s. This is the slowest-spinning radio pulsar known. PSR J0250+5854 was discovered by the LOFAR Tied-Array All-Sky Survey (LOTAAS), an all-northern-sky survey for pulsars and fast transients at a central observing frequency of 135 MHz. We subsequently detected pulsations from the pulsar in the interferometric images of the LOFAR Two-meter Sky Survey, allowing for subarcsecond localization. This, along with a pre-discovery detection 2 years prior, allowed us to measure the spin-period derivative to be {dot}P=2.7×10–14 s s–1. The observed spin period derivative of PSR J0250+5854 indicates a surface magnetic field strength, characteristic age, and spindown luminosity of 2.6×1013 G, 13.7 Myr, and 8.2×1028 erg s–1, respectively, for a dipolar magnetic field configuration. This also places the pulsar beyond the conventional pulsar death line, where radio emission is expected to cease. The spin period of PSR J0250+5854 is similar to those of the high-energy-emitting magnetars and X-ray dim isolated neutron stars (XDINSs). However, the pulsar was not detected by the Swift/X-Ray Telescope in the energy band of 0.3-10 keV, placing a bolometric luminosity limit of 1.5×1032 erg s–1 for an assumed NH=1.35×1021 cm–2 and a temperature of 85 eV (typical of XDINSs). We discuss the implications of the discovery for models of the pulsar death line as well as the prospect of finding more similarly long-period pulsars, including the advantages provided by LOTAAS for this.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): pulsars: individual: PSR J0250+5854 - radio continuum: general - stars: neutron - X-rays: individual: PSR J0250+5854

Simbad objects: 13

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2021.06.17-18:28:26

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