Publications (13)
Separating Line Emission from Star Formation, Shocks, and AGN Ionisation in NGC 1068
Joshua J. D'Agostino, Lisa J. Kewley, Brent A. Groves +6
In the optical spectra of galaxies, the separation of line emission from gas ionised by star formation and an AGN, or by star formation and shocks, are very well-understood problem…
Interrogating Seyferts with NebulaBayes: Spatially probing the narrow-line region radiation fields and chemical abundances
Adam D. Thomas, Michael A. Dopita, Lisa J. Kewley +4
NebulaBayes is a new Bayesian code that implements a general method of comparing observed emission-line fluxes to photoionization model grids. The code enables us to extract robust…
The mass-metallicity relation of local active galaxies
Adam D. Thomas, Lisa J. Kewley, Michael A. Dopita +3
We systematically measure the gas-phase metallicities and the mass-metallicity relation of a large sample of local active galaxies for the first time. Observed emission-line fluxes…
A physically-based model of the ionizing radiation from active galaxies for photoionization modeling
Adam D. Thomas, Brent A. Groves, Ralph S. Sutherland +3
We present a simplified model of Active Galactic Nucleus (AGN) continuum emission designed for photoionization modeling. The new model {\sc oxaf} reproduces the diversity of spectr…
Spatially resolved electron density in the Narrow Line Region of z<0.02 radio AGNs
D. Kakkad, B. Groves, M. Dopita +7
Although studying outflows in the host galaxies of AGN have become the forefront of extra-galactic astronomy in recent years, estimating the energy associated with these outflows h…
A New Diagnostic to Separate Line Emission from Star Formation, Shocks, and AGN Simultaneously in IFU Data
Joshua J. D'Agostino, Lisa J. Kewley, Brent A. Groves +3
In the optical spectra of galaxies, methods for the separation of line emission arising from star formation and an additional hard component, such as shocks or AGN, is well-underst…
An interacting galaxy pair at the origin of a light echo
Paola Merluzzi, Giovanni Busarello, Michael A. Dopita +5
In a low-density region of the Shapley supercluster we identified an interacting galaxy pair at redshift z=0.04865 in which the Seyfert-2 nucleus of the main galaxy (ShaSS 073) is…
The SAMI Galaxy Survey: Data Release One with Emission-line Physics Value-Added Products
Andrew W. Green, Scott M. Croom, Nicholas Scott +48
We present the first major release of data from the SAMI Galaxy Survey. This data release focuses on the emission-line physics of galaxies. Data Release One includes data for 772 g…
The ANU WiFeS SuperNovA Program (AWSNAP)
Michael J. Childress, Brad E. Tucker, Fang Yuan +24
This paper presents the first major data release and survey description for the ANU WiFeS SuperNovA Program (AWSNAP). AWSNAP is an ongoing supernova spectroscopy campaign utilising…
Mixing between Seyfert and HII-region excitation in local active galaxies
Adam D. Thomas, Lisa J. Kewley, Michael A. Dopita +3
We fit theoretical models to the emission-line spectra of 2766 Seyfert galaxies from the Sloan Digital Sky Survey (SDSS). The model line fluxes are derived by `mixing' photoionizat…
The spatially-resolved gas and dust connection in neutral inflows and outflows in nearby AGN
David S. N. Rupke, Adam D. Thomas, Michael A. Dopita
Dusty, neutral outflows and inflows are a common feature of nearby star-forming galaxies. We characterize these flows in eight galaxies -- mostly AGN -- selected for their widespre…
The SAMI Galaxy Survey: the third and final data release
Scott M. Croom, Matt S. Owers, Nicholas Scott +38
We have entered a new era where integral-field spectroscopic surveys of galaxies are sufficiently large to adequately sample large-scale structure over a cosmologically significant…
Probing the Physics of Narrow Line Regions in Active Galaxies IV: Full data release of The Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7)
Adam D. Thomas, Michael A. Dopita, Prajval Shastri +15
We present the second and final data release of the Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7). Data are presented for 63 new galaxies not included in the fi…