Astrometric Observations of Circinus X-1

Details Astrometric Observations of Circinus X-1 Astrometric Observations of Circinus X-1

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atnf.prop.3487m&link_type=abstract

ATNF proposal V433, Semester: October, 2010

Astronomy and Astrophysics

Astronomy

Pulsars, Neutron Stars, Compact Binaries And/Or Black-Holes, Transients, Lba

Scientific paper

The neutron star X-ray binary Circinus X-1 is known to have a relatively low proper motion and systemic radial velocity, demonstrating that the system has a substantial peculiar velocity. With a proper motion of <5 mas/yr, high-precision VLBI astrometric observations are therefore the only way to accurately measure the proper motion and hence deduce the formation mechanism of the system. We therefore propose an astrometric campaign, both to measure the proper motion and to constrain the distance to the source via trigonometric parallax.

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