2011A&A...528A.108S


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.09CEST08:05:01

2011A&A...528A.108S - Astronomy and Astrophysics, volume 528A, 108-108 (2011/4-1)

Prospects for accurate distance measurements of pulsars with the square kilometre array: enabling fundamental physics.

SMITS R., TINGAY S.J., WEX N., KRAMER M. and STAPPERS B.

Abstract (from CDS):

Parallax measurements of pulsars allow for accurate measurements of the interstellar electron density and contribute to accurate tests of general relativity using binary systems. The Square Kilometre Array (SKA) will be an ideal instrument for measuring the parallax of pulsars, because it has a very high sensitivity, as well as baselines extending up to several thousands of kilometres. We performed simulations to estimate the number of pulsars for which the parallax can be measured with the SKA and the distance to which a parallax can be measured. We compare two different methods. The first method measures the parallax directly by utilising the long baselines of the SKA to form high angular resolution images. The second method uses the arrival times of the radio signals of pulsars to fit a transformation between time coordinates in the terrestrial frame and the comoving pulsar frame directly yielding the parallax. We find that with the first method a parallax with an accuracy of 20% or less can be measured up to a maximum distance of 13kpc, which would include 9000 pulsars. By timing pulsars with the most stable arrival times for the radio emission, parallaxes can be measured for about 3600ms pulsars up to a distance of 9kpc with an accuracy of 20%.

Abstract Copyright:

Journal keyword(s): parallaxes - pulsars: general - stars: neutron - telescopes - astrometry

Simbad objects: 19

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Number of rows : 19

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 PSR J0024-7204C Psr 00 23 50.371 -72 04 31.44           ~ 56 1
2 PSR J0024-7204M Psr 00 23 54.489 -72 05 30.83           ~ 34 1
3 PSR J0023-7203J Psr 00 23 59.40735 -72 03 58.7914           ~ 71 1
4 PSR J0024-72L Psr 00 24 03.754 -72 04 56.87           ~ 35 1
5 PSR J0024-72F Psr 00 24 03.907 -72 04 42.47           ~ 44 1
6 PSR J0023-72S Psr 00 24 03.9779 -72 04 42.342           ~ 27 1
7 PSR J0023-72O Psr 00 24 04.637 -72 04 53.71           ~ 47 1
8 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3556 0
9 PSR J0024-72H Psr 00 24 06.686 -72 04 06.74           ~ 54 1
10 PSR B0021-72I Psr 00 24 07.9330 -72 04 39.669           ~ 52 1
11 PSR J0024-72G Psr 00 24 07.943 -72 04 39.65           ~ 40 1
12 PSR B0021-72T Psr 00 24 08.54 -72 04 38.9           ~ 38 1
13 PSR B0021-72N Psr 00 24 09.193 -72 04 28.83           ~ 33 1
14 PSR J0023-72U Psr 00 24 09.8325 -72 03 59.667           ~ 49 2
15 PSR J0024-7204E Psr 00 24 11.125 -72 05 20.14           ~ 54 1
16 PSR J0024-72D Psr 00 24 13.818 -72 04 43.83           ~ 53 1
17 PSR J0023-72Q Psr 00 24 16.482 -72 04 25.15           ~ 34 1
18 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 3474 3
19 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11613 0

    Equat.    Gal    SGal    Ecl

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2020.08.09-08:05:01

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