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Full-Text Articles in Physics
Evolution Of Stellar-To-Halo Mass Ratio At Z = 0-7 Identified By Clustering Analysis With The Hubble Legacy Imaging And Early Subaru/Hyper Suprime-Cam Survey Data, Yuichi Harikane, Masami Ouchi, Yoshiaki Ono, Surhud More, Shun Saito, For Full List Of Authors, See Publisher's Website.
Evolution Of Stellar-To-Halo Mass Ratio At Z = 0-7 Identified By Clustering Analysis With The Hubble Legacy Imaging And Early Subaru/Hyper Suprime-Cam Survey Data, Yuichi Harikane, Masami Ouchi, Yoshiaki Ono, Surhud More, Shun Saito, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
We present clustering analysis results from 10,381 Lyman break galaxies (LBGs) at z ∼ 4-7, identified in the Hubble legacy deep imaging and new complimentary large-area Subaru/Hyper Suprime-Cam data. We measure the angular correlation functions of these LBGs at z ∼ 4, 5, 6, and 7 and fit these measurements using halo occupation distribution (HOD) models that provide an estimate of halo masses, Mh ~ (1 - 20 ) x 1011 M⊙. Our Mh estimates agree with those obtained by previous clustering studies in a UV-magnitude versus Mh plane and allow us to calculate …
Metallicities And Abundance Ratios From Quasar Broad Emission Lines, Fred Hamann, K. T. Korista, Gary J. Ferland, Craig Warner, Jack Baldwin
Metallicities And Abundance Ratios From Quasar Broad Emission Lines, Fred Hamann, K. T. Korista, Gary J. Ferland, Craig Warner, Jack Baldwin
Physics and Astronomy Faculty Publications
The broad emission lines (BELs) of quasars and active galactic nuclei (AGNs) are important diagnostics of the relative abundances and overall metallicity in the gas. Here we present new theoretical predictions for several UV BELs. We focus specifically on the relative nitrogen abundance as a metallicity indicator, based on the expected secondary enrichment of nitrogen at metallicities Z≳0.2 Z☉. Among the lines we consider, NIII]λ1750/OIII]λ1664, NVλ1240/(CIVλ1549+OVIλ1034), AND NV/HeIIλ1640 are the most robust diagnostics. We argue, in particular, that the average N V BEL is not dominated by scattered Lyα photons from a broad absorption-line wind. We then …