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Ultraviolet emission lines of Si II in cool star and solar spectra
Sibasish Laha, Francis P. Keenan, Gary J. ferland +6
Recent atomic physics calculations for Si II are employed within the Cloudy modelling code to analyse Hubble Space Telescope (HST) STIS ultraviolet spectra of three cool stars, Bet…
Evidence for Photoionization Driven Broad Absorption Line Variability
Tinggui Wang, Chenwei Yang, Huiyuan Wang +1
We present a qualitative analysis of the variability of quasar broad absorption lines using the large multi-epoch spectroscopic dataset of the Sloan Digital Sky Survey Data Release…
The Nature and Frequency of Outflows from Stars in the Central Orion Nebula Cluster
C. R. O'Dell, G. J. Ferland, W. J. Henney +3
Recent Hubble Space Telescope images have allowed the determination with unprecedented accuracy of motions and changes of shocks within the inner Orion Nebula. These originate from…
Atomic Data and Spectral Models for FeII
Manuel A. Bautista, Vanessa Fivet, Connor Ballance +4
We present extensive calculations of radiative transition rates and electron impact collision strengths for Fe II. The data sets involve 52 levels from the , , an…
Atomic data for Zn II - Improving Spectral Diagnostics of Chemical Evolution in High-redshift Galaxies
Romas Kisielius, Varsha P. Kulkarni, Gary J. Ferland +3
Damped Lyman-alpha (DLA) and sub-DLA absorbers in quasar spectra provide the most sensitive tools for measuring element abundances of distant galaxies. Estimation of abundances fro…
Herschel dust emission as a probe of starless cores mass: MCLD 123.5+24.9 of the Polaris Flare
Gururaj A. Wagle, Thomas H. Troland, Gary J. Ferland +1
We present newly processed archival Herschel images of molecular cloud MCLD 123.5+24.9 in the Polaris Flare. This cloud contains five starless cores. Using the spectral synthesis c…