101 citations · 102 across the 2 of their papers we have counts for
2 papers
astro-ph2002★ 1 cited
Seven problems related to the determination of the primordial helium abundance
Manuel Peimbert, Antonio Peimbert, Valentina Luridiana +1
Recent advances on the quest to determine the primordial or pregalactic helium abundance, Yp, are reviewed. There are seven problems affecting the He/H abundance determinations of…
astro-ph1997★ 101 cited
Evidence For A Precessing Accretion Disk in the Nucleus of NGC 1097
T. Storchi-Bergmann, M. Eracleous, M. T. Ruiz +3
We present new spectroscopic observations of the LINER (and now Seyfert 1) nucleus of NGC 1097, and discuss the evolution of its broad, double-peaked Balmer lines. When originally…