19 citations · 21 across the 2 of their papers we have counts for
Showing astro-phShow all
2 papers · 1 filter
astro-ph2008★ 2 cited
Evidence against non-cosmological redshifts of QSOs in SDSS data
Sumin Tang, Shuang Nan Zhang
In the unusual intrinsic QSO redshift models, QSOs are ejected by active galaxies with periodic non-cosmological reshifts, thus QSOs are generally associated with active galaxies,…
astro-ph2007★ 19 cited
Is the dependence of spectral index on luminosity real in optically selected AGN samples?
Sumin Tang, Shuang Nan Zhang, Philip F. Hopkins
We critically examine the dependence of spectral index on luminosity in optically selected AGN samples. An analysis of optically selected high-redshift quasars showed an anti-corre…