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Tests of subgrid models for star formation using simulations of isolated disk galaxies (2024)
Journal Article
Nobels, F. S. J., Schaye, J., Schaller, M., Ploeckinger, S., Chaikin, E., & Richings, A. J. (online). Tests of subgrid models for star formation using simulations of isolated disk galaxies. Monthly notices of the Royal Astronomical Society, Article stae1390. https://doi.org/10.1093/mnras/stae1390

We use smoothed-particle hydrodynamics simulations of isolated Milky Way-mass disk galaxies that include cold, interstellar gas to test subgrid prescriptions for star formation (SF). Our fiducial model combines a Schmidt law with a gravitational inst... Read More about Tests of subgrid models for star formation using simulations of isolated disk galaxies.

Predictions for CO emission and the CO-to-H2 conversion factor in galaxy simulations with non-equilibrium chemistry (2024)
Journal Article
Thompson, O. A., Richings, A. J., Gibson, B. K., Faucher-Giguère, C.-A., Feldmann, R., & Hayward, C. C. (2024). Predictions for CO emission and the CO-to-H2 conversion factor in galaxy simulations with non-equilibrium chemistry. Monthly notices of the Royal Astronomical Society, 532(2), 1948-1965. https://doi.org/10.1093/mnras/stae1486

Our ability to trace the star-forming molecular gas is important to our understanding of the Universe. We can trace this gas using CO emission, converting the observed CO intensity into the H2 gas mass of the region using the CO-to-H2 conversion fact... Read More about Predictions for CO emission and the CO-to-H2 conversion factor in galaxy simulations with non-equilibrium chemistry.

Do galaxy mergers prefer under-dense environments? (2024)
Journal Article
Sureshkumar, U., Durkalec, A., Pollo, A., Pearson, W., Farrow, D., Narayanan, A., Loveday, J., Taylor, E., & Suelves, L. (2024). Do galaxy mergers prefer under-dense environments?. Astronomy and Astrophysics, 686, Article A40. https://doi.org/10.1051/0004-6361/202347705

Context. Galaxy mergers play a crucial role in galaxy evolution. However, the correlation between mergers and the local environment of galaxies is not fully understood. Aims. We aim to address the question of whether galaxy mergers prefer denser or... Read More about Do galaxy mergers prefer under-dense environments?.

The second data release from the European Pulsar Timing Array: IV. Implications for massive black holes, dark matter, and the early Universe (2024)
Journal Article
EPTA Collaboration and InPTA Collaboration, Antoniadis, J., Arumugam, P., Arumugam, S., Babak, S., Bagchi, M., …Valtolina, S. (2024). The second data release from the European Pulsar Timing Array: IV. Implications for massive black holes, dark matter, and the early Universe. Astronomy and Astrophysics, 685, Article A94. https://doi.org/10.1051/0004-6361/202347433

The European Pulsar Timing Array (EPTA) and Indian Pulsar Timing Array (InPTA) collaborations have measured a low-frequency common signal in the combination of their second and first data releases, respectively, with the correlation properties of a g... Read More about The second data release from the European Pulsar Timing Array: IV. Implications for massive black holes, dark matter, and the early Universe.

Comparing Recent Pulsar Timing Array Results on the Nanohertz Stochastic Gravitational-wave Background (2024)
Journal Article
Agazie, G., Antoniadis, J., Anumarlapudi, A., Archibald, A. M., Arumugam, P., Arumugam, S., …The International Pulsar Timing Array Collaboration. (2024). Comparing Recent Pulsar Timing Array Results on the Nanohertz Stochastic Gravitational-wave Background. The Astrophysical journal, 966(1), Article 105. https://doi.org/10.3847/1538-4357/ad36be

The Australian, Chinese, European, Indian, and North American pulsar timing array (PTA) collaborations recently reported, at varying levels, evidence for the presence of a nanohertz gravitational-wave background (GWB). Given that each PTA made differ... Read More about Comparing Recent Pulsar Timing Array Results on the Nanohertz Stochastic Gravitational-wave Background.

Dense stellar clump formation driven by strong quasar winds in the FIRE cosmological hydrodynamic simulations (2024)
Journal Article
Mercedes-Feliz, J., Anglés-Alcázar, D., Oh, B. K., Hayward, C. C., Cochrane, R. K., Richings, A. J., …Hopkins, P. F. (2024). Dense stellar clump formation driven by strong quasar winds in the FIRE cosmological hydrodynamic simulations. Monthly notices of the Royal Astronomical Society, 530(3), 2795-2809. https://doi.org/10.1093/mnras/stae1021

We investigate the formation of dense stellar clumps in a suite of high-resolution cosmological zoom-in simulations of a massive, star-forming galaxy at z ∼ 2 under the presence of strong quasar winds. Our simulations include multiphase ISM physics f... Read More about Dense stellar clump formation driven by strong quasar winds in the FIRE cosmological hydrodynamic simulations.

Under threat: the International AIDS Society–Lancet Commission on Health and Human Rights (2024)
Journal Article
Beyrer, C., Kamarulzaman, A., Isbell, M., Amon, J., Baral, S., Bassett, M. T., Cepeda, J., Deacon, H., Dean, L., Fan, L., Giacaman, R., Gomes, C., Gruskin, S., Goyal, R., Mon, S. H. H., Jabbour, S., Kazatchkine, M., Kasoka, K., Lyons, C., Maleche, A., …Rubenstein, L. (2024). Under threat: the International AIDS Society–Lancet Commission on Health and Human Rights. Lancet, 403(10434), 1374-1418. https://doi.org/10.1016/S0140-6736%2824%2900302-7

2023 marked the 75th anniversary of the UN's Universal Declaration of Human Rights. The Universal Declaration articulates an inspiring vision of a world that is just, equitable, tolerant, and strategically focused on actions to address the most vulne... Read More about Under threat: the International AIDS Society–Lancet Commission on Health and Human Rights.

Tailored risk assessment and forecasting in intermittent claudication (2024)
Journal Article
Ravindhran, B., Prosser, J., Lim, A., Lathan, R., Mishra, B., Hitchman, L., Smith, G. E., Carradice, D., Thakker, D., Chetter, I. C., & Pymer, S. (2024). Tailored risk assessment and forecasting in intermittent claudication. BJS Open, 8(1), Article zrad166. https://doi.org/10.1093/bjsopen/zrad166

Background: Guidelines recommend cardiovascular risk reduction and supervised exercise therapy as the first line of treatment in intermittent claudication, but implementation challenges and poor patient compliance lead to significant variation in man... Read More about Tailored risk assessment and forecasting in intermittent claudication.

The interplay between dust and radiation (2024)
Book Chapter
Richings, A. (2024). The interplay between dust and radiation. In S. Bovino, & T. Grassi (Eds.), Astrochemical Modeling: Practical Aspects of Microphysics in Numerical Simulations (157-188). Amsterdam: Elsevier. https://doi.org/10.1016/B978-0-32-391746-9.00015-8

The attenuation of radiation due to dust depends on the composition and optical properties of the dust grains. This is fundamental to determine the impact of radiation on chemical evolution. In this chapter, we discuss how we can compute grain proper... Read More about The interplay between dust and radiation.

Pulsar scintillation through thick and thin: bow shocks, bubbles, and the broader interstellar medium (2023)
Journal Article
Ocker, S. K., Cordes, J. M., Chatterjee, S., Stinebring, D. R., Dolch, T., Giannakopoulos, C., …Reardon, D. J. (2024). Pulsar scintillation through thick and thin: bow shocks, bubbles, and the broader interstellar medium. Monthly notices of the Royal Astronomical Society, 527(3), 7568-7587. https://doi.org/10.1093/mnras/stad3683

Observations of pulsar scintillation are among the few astrophysical probes of very small-scale ( au) phenomena in the interstellar medium (ISM). In particular, characterization of scintillation arcs, including their curvature and intensity distribut... Read More about Pulsar scintillation through thick and thin: bow shocks, bubbles, and the broader interstellar medium.