SIMBAD references

2003A&A...408..323M - Astronomy and Astrophysics, volume 408, 323-330 (2003/9-2)

The proper motion and energy distribution of the isolated neutron star RX J0720.4-3125.


Abstract (from CDS):

ESO 4 m class telescope and VLT deep imaging of the isolated neutron star RXJ0720.4-3125 reveals a proper motion of µ=97±12mas/yr and a blue U-B color index. We show that a neutron star atmosphere model modified to account for a limited amount of hydrogen on the star's surface can well represent both the optical and X-ray data without invoking any additional thermal component. The large proper motion almost completely excludes the possibility that accretion from the interstellar medium is the powering mechanism of the X-ray emission. It also implies that the proposed spin down is entirely due to magnetic dipole losses. RXJ0720.4-3125 is thus very likely a middle aged cooling neutron star. Its overall properties are quite similar to some of the long period radio pulsars recently discovered, giving further support to the idea that RXJ0720.4-3125 may be a pulsar whose narrow radio beam does not cross the Earth.

Abstract Copyright:

Journal keyword(s): stars: newton - X-rays: individual: RX J0720.4-3125

Simbad objects: 9

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2003A&A...408..323M and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact