SIMBAD references

2003ApJ...590.1008K - Astrophys. J., 590, 1008-1019 (2003/June-3)

The nearby neutron star RX J0720.4-3125 from radio to X-rays.

KAPLAN D.L., VAN KERKWIJK M.H., MARSHALL H.L., JACOBY B.A., KULKARNI S.R. and FRAIL D.A.

Abstract (from CDS):

We present radio, optical, ultraviolet, and X-ray observations of the isolated, thermally emitting neutron star RX J0720.4-3125 using the Parkes radio telescope, the Very Large Array, the Hubble Space Telescope, and the Chandra X-Ray Observatory. From these data we show that the optical/UV spectrum of RX J0720.4-3125 is not well fitted by a Rayleigh-Jeans tail as previously thought but is instead best fitted by either a single nonthermal power law or a combination of a Rayleigh-Jeans tail and a nonthermal power law. Taken together with the X-ray spectrum, we find the best model for RX J0720.4-3125 to be two blackbodies plus a power law, with the cool blackbody implying a radius of 11-13 km at an assumed distance of 300 pc. This is similar to many middle-aged (105-106 yr) radio pulsars such as PSR B0656+14, evidence supporting the hypothesis that RX J0720.4-3125 is likely to be an off-beam radio pulsar. The radio data limit the flux at 1.4 GHz to be less than 0.24 mJy, or a luminosity limit of 4πd2F<3x1025d2300ergs s–1, and we see no sign of extended nebulosity, consistent with expectations for a pulsar like RX J0720.4-3125.

Abstract Copyright:

Journal keyword(s): Stars: Pulsars: Individual: Alphanumeric: RX J0720.4-3125 - Stars: Neutron - X-Rays: Stars

CDS comments: Parag. 5.2 : PSR J2144-3944 is a misprint for J2144-3933

Simbad objects: 17

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2021.06.19-09:52:27

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