7 papers · 1 filter
The Small-scale Structures in the Wind of Messier 82
Yucheng Guo, Timothy Heckman, Sanchayeeta Borthakur +10
Small-scale multiphase structure plays a central role in galactic-wind evolution, yet the parsec-scale morphology and excitation of the warm ionised gas remain poorly constrained.…
The Internal Nebular Attenuation Curve of Three-Dimensional Turbulent HII regions
Yifei Jin, Yong Shi, Ralph Sutherland +2
The internal dust attenuation of the Hii region reduces the observed emission-line fluxes. Turbulent density fields within each Hii region change the degree of the line-of-the-sigh…
A Theoretical Three-Dimensional Diagram to Separate Star Formation, Active Galactic Nuclei, and Shocks in Galaxies
Peixin Zhu, Lisa J. Kewley, Ralph S. Sutherland +1
The excitation sources in galaxies are frequently mixed due to AGN and stellar feedback, including star formation, active galactic nuclei (AGNs), and shock excitation. Disentanglin…
A model for the emission line galaxy luminosity function and flux ratios at high-redshifts
Aadarsh Pathak, J. Stuart B. Wyithe, Ralph S. Sutherland +1
We present emision line flux ratio predictions for galaxies at using the MAPPINGS V v5.2.0 photoionization modelling code combined with an analytic…
Strong nebular HeII emission induced by He ionizing photons escaping through the clumpy winds of massive stars
Arpita Roy, Mark R. Krumholz, Stefania Salvadori +8
The origin of nebular HeII-emission in both local and high-redshift galaxies remains an unsolved problem. Various theories have been proposed to explain it, including HeII-ionizati…
Theoretical Diagnostics for Narrow Line Regions of Active Galactic Nuclei
Peixin Zhu, Lisa J. Kewley, Ralph Sutherland
Gas metallicity, ionization parameter, and gas pressure can affect the observed ratios of specific strong emission lines within galaxies. While the theoretical strong lines diagnos…