Zobrazeno 1 - 10
of 304
pro vyhledávání: '"Sutherland, Ralph"'
Gas metallicity, ionization parameter, and gas pressure can affect the observed ratios of specific strong emission lines within galaxies. While the theoretical strong lines diagnostics for gas metallicity, ionization parameters, and gas pressure in s
Externí odkaz:
http://arxiv.org/abs/2411.04103
We present $[OIII]/H_{\rm \beta}$ emision line flux ratio predictions for galaxies at $z \sim 7-9$ using the MAPPINGS V v5.2.0 photoionization modelling code combined with an analytic galaxy formation model. Properties such as pressure and ionization
Externí odkaz:
http://arxiv.org/abs/2410.23606
Autor:
Li, Song-Lin, Grasha, Kathryn, Krumholz, Mark R., Wisnioski, Emily, Sutherland, Ralph S., Kewley, Lisa J., Chen, Yan-Mei, Li, Zefeng
Galaxies' stellar masses, gas-phase oxygen abundances (metallicity), and star formation rates (SFRs) obey a series of empirical correlations, most notably the mass-metallicity relation (MZR) and fundamental metallicity relation (FZR), which relates o
Externí odkaz:
http://arxiv.org/abs/2403.16069
Photoionization models frequently assume constant temperature or density within HII regions. We investigate this assumption by measuring the detailed temperature and density structures of four HII regions in the Large Magellanic Cloud and the Small M
Externí odkaz:
http://arxiv.org/abs/2310.01703
The photoionization model of narrow-line regions (NLRs) in active galactic nuclei (AGNs) has been investigated for decades. Many published models are restricted to simple linear scaling abundance relations, dust-free assumption, uniform AGN radiation
Externí odkaz:
http://arxiv.org/abs/2305.12670
Autor:
Roy, Arpita, Krumholz, Mark R., Dopita, Michael A., Sutherland, Ralph S., Kewley, Lisa J., Heger, Alexander
Publikováno v:
Proceedings of the International Astronomical Union, 16(S366), 33-38, 2022
Understanding the nucleosynthetic origin of nitrogen and the evolution of the N/O ratio in the interstellar medium is crucial for a comprehensive picture of galaxy chemical evolution at high-redshift because most observational metallicity (O/H) estim
Externí odkaz:
http://arxiv.org/abs/2212.05103
We create a photoionization model embedded in the turbulent ISM by using the state-of-the-art Messenger Monte-Carlo MAPPINGS~V code (M$^3$) in conjunction with the CMFGEN stellar atmosphere model. We show that the turbulent ISM causes the inhomogenei
Externí odkaz:
http://arxiv.org/abs/2207.06672
Publikováno v:
2022ApJ...927...37J
The Messenger Interface Monte-Carlo Mappings V (M^3) is a photoionization code adopting the fully self-consistent Monte-Carlo radiative transfer technique, which presents a major advance over previous photoionization models with simple geometries. M^
Externí odkaz:
http://arxiv.org/abs/2204.00250
Autor:
Meenakshi, Moun, Mukherjee, Dipanjan, Wagner, Alexander Y., Nesvadba, Nicole P. H., Bicknell, Geoffrey V., Morganti, Raffaella, Janssen, Reinier M. J., Sutherland, Ralph S., Mandal, Ankush
Relativistic jets are believed to have a substantial impact on the gas dynamics and evolution of the interstellar medium (ISM) of their host galaxies. In this paper, we aim to draw a link between the simulations and the observable signatures of jet-I
Externí odkaz:
http://arxiv.org/abs/2203.10251
Autor:
Zovaro, Henry R. M., Sharp, Robert, Nesvadba, Nicole P. H., Kewley, Lisa, Sutherland, Ralph, Taylor, Philip, Groves, Brent, Wagner, Alexander Y., Mukherjee, Dipanjan, Bicknell, Geoffrey V.
Local examples of jet-induced star formation lend valuable insight into its significance in galaxy evolution and can provide important observational constraints for theoretical models of positive feedback. Using optical integral field spectroscopy, w
Externí odkaz:
http://arxiv.org/abs/2010.03139