Determination of Redshifts for Selected IVS Sources. I

Details Determination of Redshifts for Selected IVS Sources. I Determination of Redshifts for Selected IVS Sources. I

2009-12-30

arxiv.org/abs/0912.5431v1

Astrophys.53:147-153,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

8 pp., submitted to Astrophysics

Scientific paper

10.1007/s10511-010-9107-z

From observations with the 6-m BTA telescope at SAO RAS, we have determined spectroscopic redshifts of seven optical objects whose coordinates coincide with those of radio sources from the list of IVS (International VLBI Service for Geodesy and Astrometry). When compared to radio data, the obtained spectra and redshifts provide evidence for reliable identification of four observed objects; the other three require further study. The distances to the sources derived from our measurements will make it possible to refine the current estimates for parameters of cosmological models based on proper motions of these objects, which are determined from geodetic VLBI observations.

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