2003A&A...408..323M


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.20CEST07:21:28

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.

MOTCH C., ZAVLIN V.E. and HABERL F.

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

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 PG 0231+051 WD* 02 33 41.3573346299 +05 18 43.652047965 14.562 15.776 16.096 16.267 16.639 DAO.6 139 0
2 [KVA2007] 102 * 07 20 24.44 -31 25 52.4   20.57 20.00 19.41   G2 6 0
3 GSC2 S132212380238 * 07 20 24.786 -31 26 08.27           ~ 1 0
4 RX J0720.4-3125 N* 07 20 24.961 -31 25 50.21   26.1   27.0   ~ 285 0
5 [KVA2007] 103 * 07 20 25.19 -31 26 00.4   20.83 20.13 19.61   G2 6 0
6 PG 0942-029 HS* 09 45 11.8536195586 -03 09 21.033075924 12.537 13.714 14.012 14.144 14.308 sdB 46 0
7 V* UY Sex HS* 10 50 02.8264873492 -00 00 36.880346331 12.063 13.184 13.474 13.606 13.769 sdO9VIIHe6 151 0
8 PSR B1827-11.6 Psr 18 30 01.7000 -11 35 09.000           ~ 16 0
9 RX J1856.6-3754 N* 18 56 35.11 -37 54 30.5     25.7     ~ 393 0

    Equat.    Gal    SGal    Ecl

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2021.04.20-07:21:28

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