All Outputs (27)

Bimodality of low-redshift circumgalactic O VI in non-equilibrium EAGLE zoom simulations (2016)
Journal Article
Oppenheimer, B. D., Crain, R. A., Schaye, J., Rahmati, A., Richings, A. J., Trayford, J. W., Tumlinson, J., Bower, R. G., Schaller, M., & Theuns, T. (2016). Bimodality of low-redshift circumgalactic O VI in non-equilibrium EAGLE zoom simulations. Monthly notices of the Royal Astronomical Society, 460(2), 2157-2179. https://doi.org/10.1093/mnras/stw1066

We introduce a series of 20 cosmological hydrodynamical simulations of L* (M200 = 10^11.7-10^12.3M⊙) and group-sized (M200 = 10^12.7-10^13.3M⊙) haloes run with the model used for the eagle project, which additionally includes a non-equilibrium ioniza... Read More about Bimodality of low-redshift circumgalactic O VI in non-equilibrium EAGLE zoom simulations.

The effects of metallicity, UV radiation and non-equilibrium chemistry in high-resolution simulations of galaxies (2016)
Journal Article
Richings, A. J., & Schaye, J. (2016). The effects of metallicity, UV radiation and non-equilibrium chemistry in high-resolution simulations of galaxies. Monthly notices of the Royal Astronomical Society, 458(1), 270-292. https://doi.org/10.1093/mnras/stw327

We present a series of hydrodynamic simulations of isolated galaxies with stellar mass of 109M˙. The models use a resolution of 750M˙ per particle and include a treatment for the full non-equilibrium chemical evolution of ions and molecules (157 spec... Read More about The effects of metallicity, UV radiation and non-equilibrium chemistry in high-resolution simulations of galaxies.

Non-equilibrium chemistry and cooling in the diffuse interstellar medium - II. Shielded gas (2014)
Journal Article
Richings, A. J., Schaye, J., & Oppenheimer, B. D. (2014). Non-equilibrium chemistry and cooling in the diffuse interstellar medium - II. Shielded gas. Monthly notices of the Royal Astronomical Society, 442(3), 2780-2796. https://doi.org/10.1093/mnras/stu1046

We extend the non-equilibrium model for the chemical and thermal evolution of diffuse interstellar gas presented in Richings et al. to account for shielding from the UV radiation field. We attenuate the photochemical rates by dust and by gas, includi... Read More about Non-equilibrium chemistry and cooling in the diffuse interstellar medium - II. Shielded gas.

Non-equilibrium chemistry and cooling in the diffuse interstellar medium - I. Optically thin regime (2014)
Journal Article
Richings, A. J., Schaye, J., & Oppenheimer, B. D. (2014). Non-equilibrium chemistry and cooling in the diffuse interstellar medium - I. Optically thin regime. Monthly notices of the Royal Astronomical Society, 440(4), 3349-3369. https://doi.org/10.1093/mnras/stu525

An accurate treatment of the multiphase interstellar medium (ISM) in hydrodynamic galaxy simulations requires that we follow not only the thermal evolution of the gas, but also the evolution of its chemical state, including its molecular chemistry, w... Read More about Non-equilibrium chemistry and cooling in the diffuse interstellar medium - I. Optically thin regime.

The connection between radio loudness and central surface brightness profiles in optically selected low-luminosity active galaxies (2011)
Journal Article
Richings, A. J., Uttley, P., & Körding, E. (2011). The connection between radio loudness and central surface brightness profiles in optically selected low-luminosity active galaxies. Monthly notices of the Royal Astronomical Society, 415(3), 2158-2172. https://doi.org/10.1111/j.1365-2966.2011.18845.x

Recent results indicate a correlation between nuclear radio loudness of active galaxies and their central stellar surface-brightness profiles, in that 'core' galaxies (with inner logarithmic slope γ≤ 0.3) are significantly more radio loud than 'power... Read More about The connection between radio loudness and central surface brightness profiles in optically selected low-luminosity active galaxies.

Field and globular cluster low-mass X-ray binaries in NGC 4278 (2010)
Journal Article
Fabbiano, G., Brassington, N. J., Lentati, L., Angelini, L., Davies, R. L., Gallagher, J., Kalogera, V., Kim, D. W., King, A. R., Kundu, A., Pellegrini, S., Richings, A. J., Trinchieri, G., Zezas, A., & Zepf, S. (2010). Field and globular cluster low-mass X-ray binaries in NGC 4278. The Astrophysical journal, 725(2), 1824-1847. https://doi.org/10.1088/0004-637X/725/2/1824

We report a detailed spectral analysis of the population of low-massX-ray binaries (LMXBs) detected in the elliptical galaxy NGC 4278 with Chandra. Seven luminous sources were studied individually, four in globular clusters (GCs) and three in the ste... Read More about Field and globular cluster low-mass X-ray binaries in NGC 4278.

The hot interstellar medium of the interacting galaxy NGC 4490 (2010)
Journal Article
Richings, A. J., Fabbiano, G., Wang, J., & Roberts, T. P. (2010). The hot interstellar medium of the interacting galaxy NGC 4490. The Astrophysical journal, 723(2), 1375-1392. https://doi.org/10.1088/0004-637X/723/2/1375

We present an analysis of the hot interstellar medium (ISM) in the spiral galaxy NGC 4490, which is interacting with the irregular galaxy NGC 4485, using ∼100 ks of Chandra ACIS-S observations. The high angular resolution of Chandra enables us to rem... Read More about The hot interstellar medium of the interacting galaxy NGC 4490.