Description
Title: Spectral diagnostics and the Excitation Mechanism for Broad UV Emission Lines in Type-1 Active Galaxies
Abstract: This article discusses a number of fundamental UV emission line characteristics, primarily as a function of the ionization parameter, metallicity, and density of the emitting gas, as seen in the spectra of quasars and type 1 active galactic nuclei. The analysis makes use of a general-purpose 4D array of photoionization simulations computed with the CLOUDY program, covering hydrogen density nH 107-1014 cm3, metallicity Z between 0.01 and 100 Z, and column density in the range 1021-1023 cm2. The main focus is on the most notable UV emission lines found in quasar spectra, including NVl1240, SiIVl1397, OIV]l1402, CIVl1549, HeIIl1640, AlIIIl1860, SiIII]l1892, and CIII]l1909, as well as the physical circumstances that electron-ion impact excitation is predicted to occur under most frequently. Spectral diagnostics derived from measurements of emission line ratios are thought to be important for determining the ionization degree, density, and metallicity of the broad line emitting gas, as well as the relative intensity ratios of the doublet or multiplet components important for empirical spectral modeling. Photoionization simulations help constrain the physical interpretation and the domain of applicability of these diagnostics.
Keywords: atomic processes; UV spectroscopy; ionized gas; broad line region
Paper Quality: SCOPUS / Web of Science Level Research Paper
Subject: Physics
Subject Category: Atomic and Molecular Physics, and Optics
Writer Experience: 20+ Years
Plagiarism Report: Turnitin Plagiarism Report will be less than 10%
Restriction: Only one author may purchase a single paper. The paper will then indicate that it is out of stock.
What will I get after the purchase?
A turnitin plagiarism report of less than 10% in a pdf file and a full research paper in a word document.
In case you have any questions related to this research paper, please feel free to call/ WhatsApp on +919726999915
Reviews
There are no reviews yet.