A compiled sample of xA quasars yields H0 = 69.8 ± 2.2 km s^{-1} Mpc^{-1} alone and 69.0 ± 0.9 when combined with SNIa, chronometers and CMB priors, with weak Bayesian preference for wCDM and w0waCDM over ΛCDM.
Spectral monitoring of AGNs: Preliminary results for Ark 564 and Arp 102B
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abstract
We present preliminary results of the long term spectral monitoring of two active galactic nuclei with different broad line shapes: Ark 564 and Arp 102B. Ark 564 is a bright nearby narrow line Syfert 1 (NLS1) galaxy with relatively narrow permitted optical emission lines and a high FeII/H${\beta}$ ratio, while Arp 102B is a nearby broad-line radio galaxy with broad double-peaked Balmer emission lines. The spectra of Ark 564 were observed during 11-year period (1999-2009) and the spectra of Arp 102B in the 12-year period (1998-2009), with SAO 6-m and 1-m telescopes (Russia) and the GHAO 2.1-m telescope (Cananea, Mexico).
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Preliminary cosmological results using extreme accretors Quasar formalism
A compiled sample of xA quasars yields H0 = 69.8 ± 2.2 km s^{-1} Mpc^{-1} alone and 69.0 ± 0.9 when combined with SNIa, chronometers and CMB priors, with weak Bayesian preference for wCDM and w0waCDM over ΛCDM.