On the relative proper motion of quasars 1038+528 A,B

Abstract

view Abstract Citations (19) References (16) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS On the Relative Proper Motion of Quasars 1038+528 A,B Marcaide, J. M. ; Elosegui, P. ; Shapiro, I. I. Abstract We observed the pair of quasars 1038+528A (z = 0.678) and 1038+528 B (z = 2.296), separated on the sky by 33", using very long baseline interferometry in 1981 and 1983, simultaneously at λ = 3.6 and 13 cm. From hybrid maps of the compact structures of the two quasars made from these observations, we were able to identify reference points in each. By comparing the relative positions of the points in the two quasars, we obtained an estimate of their relative proper motion at λ = 3.6 cm: 31 +/- 22 microarcsec/yr. This value, being only about 1.5 standard deviations, cannot be considered a detection of proper motion. We propose a smooth jet model consistent with this result. The proper-motion prediction from this model differs from that of "bona fide" proper motion and could likely be distinguished from it with measurements spanning a decade or more, were the maximum instantaneous proper motion to be of the order of 30 microarcsec/yr. Publication: The Astronomical Journal Pub Date: August 1994 DOI: 10.1086/117075 Bibcode: 1994AJ....108..368M Keywords: Astrometry; Extragalactic Radio Sources; Quasars; Radio Sources (Astronomy); Very Long Base Interferometry; Astronomical Maps; Radio Spectra; Red Shift; Wavelengths; Astronomy; QUASARS: INDIVIDUAL: 1038; 528 A; 528 B full text sources ADS | data products SIMBAD (2) NED (2)