arXiv subjects

V. K. Dubrovich

Publications and source records attributed to V. K. Dubrovich.

20 records · Page 2Linked to original sources

arXiv2001

What is the manifestation of a "quasar" at z > 10^{10} ?

The process of forming an image of a cosmological point source (CPS) in condition of high optical depth is considered accounting for all types of interactions. It is shown that the energy conservation law causes the size of this image which is keeping constant over all redshifts of the CPSs. This effect must be taken into account for the consideration of the angular power spectrum of the CMBR. In particular, distant point sources and small scale fluctuations which were damping before recombination will contribute their energy in the region of angular scale θ_0 \approx 20'.

astro-ph↗

arXiv1998

CO molecules in the shells of quasars 1556+3517 and 0840+3633

New class of low- ionization BAL quasars (Becker et al. 1997), represented by QSO 1556+3517, 0840+3633 and 0059-2735, is considered. Their optical spectra are completely dominated by absorption features, whereas emission lines are weak or absent. Possibility to explain these exclusive features of their spectra by existence of molecular shells, responsible for the absorption is discussed. In particular, it is suggested to identify line at lambda = 2063 A, attributed to CrII, as a line of Cameron band of CO molecule. Estimation of the expected optical depth value in rotational radio lines of this molecule is made. It is suggested to carry out radio observations of quasars 1556+3517 and 0840+3633 to check the molecular hypotheses.

astro-ph↗