Outputs (115)

A search for H i absorption in distant star-forming galaxies with ASKAP-FLASH -I. Selection and analysis of the radio sample (2024)
Journal Article
Eden, S. L., Sadler, E. M., Pimbblet, K. A., Mahony, E. K., & Yoon, H. (2025). A search for H i absorption in distant star-forming galaxies with ASKAP-FLASH -I. Selection and analysis of the radio sample. Monthly notices of the Royal Astronomical Society, 536(1), 387-407. https://doi.org/10.1093/mnras/stae2581

We present and discuss two catalogues of UV-selected (NUV < 22.8 mag) galaxies that lie within a 200 deg 2 area of sky covered by the ASKAP FLASH survey and have an impact parameter of less than 20 arcsec to a FLASH radio continuum source. These cata... Read More about A search for H i absorption in distant star-forming galaxies with ASKAP-FLASH -I. Selection and analysis of the radio sample.

Constraining SN Ia Progenitors from the Observed Fe-peak Elemental Abundances in the Milky Way Dwarf Galaxy Satellites (2024)
Preprint / Working Paper
Alexander, R., & Vincenzo, F. Constraining SN Ia Progenitors from the Observed Fe-peak Elemental Abundances in the Milky Way Dwarf Galaxy Satellites

Chemical abundances of iron-peak elements in the red giants of ultra-faint dwarf galaxies (UFD) and dwarf spheroidal galaxies (dSph) are among the best diagnostics in the cosmos to probe the origin of Type Ia Supernovae (SNe Ia). We incorporate metal... Read More about Constraining SN Ia Progenitors from the Observed Fe-peak Elemental Abundances in the Milky Way Dwarf Galaxy Satellites.

Tests of subgrid models for star formation using simulations of isolated disc galaxies (2024)
Journal Article
Nobels, F. S. J., Schaye, J., Schaller, M., Ploeckinger, S., Chaikin, E., & Richings, A. J. (2024). Tests of subgrid models for star formation using simulations of isolated disc galaxies. Monthly notices of the Royal Astronomical Society, 532(3), 3299-3321. https://doi.org/10.1093/mnras/stae1390

We use smoothed particle hydrodynamics simulations of isolated Milky Way-mass disc 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 disc 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.

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., Faucher-Giguère, C. A., Wellons, S., Terrazas, B. A., Moreno, J., Su, K. Y., & 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.

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). 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.

Constraining the driving mechanism of galaxy-scale winds with emission line spectra (2023)
Presentation / Conference Contribution
Stern, J., Oñorbe, J., Richings, A. J., Johnson, S. D., & Faucher-Giguère, C.-A. (2023, March). Constraining the driving mechanism of galaxy-scale winds with emission line spectra. Presented at Black Hole Winds at All Scales : IAU symposium 378, Haifa, Israel

Using hydrodynamic simulations and photoionization calculations, we demonstrate that quasar emission line spectra contain information on the driving mechanism of galaxy-scale outflows. Outflows driven by a hot shocked bubble are expected to exhibit L... Read More about Constraining the driving mechanism of galaxy-scale winds with emission line spectra.

GTC Follow-up Observations of Very Metal-poor Star Candidates from DESI (2023)
Journal Article
Allende Prieto, C., Aguado, D. S., González Hernández, J. I., Rebolo, R., Najita, J., Manser, C. J., Rockosi, C., Slepian, Z., Mezcua, M., Valluri, M., Ezzeddine, R., Koposov, S. E., Cooper, A. P., Dey, A., Gänsicke, B. T., Li, T. S., Cunha, K., Zou, S., Aguilar, J. N., Ahlen, S., …Zou, H. (2023). GTC Follow-up Observations of Very Metal-poor Star Candidates from DESI. The Astrophysical journal, 957(2), Article 76. https://doi.org/10.3847/1538-4357/acfa96

The observations from the Dark Energy Spectroscopic Instrument (DESI) will significantly increase the numbers of known extremely metal-poor stars by a factor of ~10, improving the sample statistics to study the early chemical evolution of the Milky W... Read More about GTC Follow-up Observations of Very Metal-poor Star Candidates from DESI.

Local positive feedback in the overall negative: the impact of quasar winds on star formation in the FIRE cosmological simulations (2023)
Journal Article
Mercedes-Feliz, J., Anglés-Alcázar, D., Hayward, C. C., Cochrane, R. K., Terrazas, B. A., Wellons, S., Richings, A. J., Faucher-Giguère, C. A., Moreno, J., Su, K. Y., Hopkins, P. F., Quataert, E., & Kereš, D. (2023). Local positive feedback in the overall negative: the impact of quasar winds on star formation in the FIRE cosmological simulations. Monthly notices of the Royal Astronomical Society, 524(3), 3446-3463. https://doi.org/10.1093/mnras/stad2079

Negative feedback from accreting supermassive black holes is considered crucial in suppressing star formation and quenching massive galaxies. However, several models and observations suggest that black hole feedback may have a positive effect, trigge... Read More about Local positive feedback in the overall negative: the impact of quasar winds on star formation in the FIRE cosmological simulations.

The NANOGrav 15 yr Data Set: Detector Characterization and Noise Budget (2023)
Journal Article
Agazie, G., Anumarlapudi, A., Archibald, A. M., Arzoumanian, Z., Baker, P. T., Bécsy, B., Blecha, L., Brazier, A., Brook, P. R., Burke-Spolaor, S., Charisi, M., Chatterjee, S., Cohen, T., Cordes, J. M., Cornish, N. J., Crawford, F., Cromartie, H. T., Crowter, K., DeCesar, M. E., Demorest, P. B., …Young, O. (2023). The NANOGrav 15 yr Data Set: Detector Characterization and Noise Budget. Astrophysical journal. Letters, 951(1), Article L10. https://doi.org/10.3847/2041-8213/acda88

Pulsar timing arrays (PTAs) are galactic-scale gravitational wave (GW) detectors. Each individual arm, composed of a millisecond pulsar, a radio telescope, and a kiloparsecs-long path, differs in its properties but, in aggregate, can be used to extra... Read More about The NANOGrav 15 yr Data Set: Detector Characterization and Noise Budget.

Inhomogeneous Galactic chemical evolution: modelling ultra-faint dwarf galaxies of the Large Magellanic Cloud (2023)
Journal Article
Alexander, R. K., Vincenzo, F., Ji, A. P., Richstein, H., Jordan, C. J., & Gibson, B. K. (2023). Inhomogeneous Galactic chemical evolution: modelling ultra-faint dwarf galaxies of the Large Magellanic Cloud. Monthly notices of the Royal Astronomical Society, 522(4), 5415-5433. https://doi.org/10.1093/mnras/stad1312

Ultra-faint dwarf galaxies (UFDs) are among the oldest and most metal-poor galaxies in the cosmos, observed to contain no gas and a high dark matter mass fraction. Understanding the chemical abundance dispersion in such extreme environments could she... Read More about Inhomogeneous Galactic chemical evolution: modelling ultra-faint dwarf galaxies of the Large Magellanic Cloud.

Noise reduction in single-shot images using an auto-encoder (2023)
Journal Article
Bartlett, O. J., Benoit, D. M., Pimbblet, K. A., Simmons, B., & Hunt, L. (2023). Noise reduction in single-shot images using an auto-encoder. Monthly notices of the Royal Astronomical Society, 521(4), 6318-6329. https://doi.org/10.1093/mnras/stad665

We present an application of auto-encoders to the problem of noise reduction in single-shot astronomical images and explore its suitability for upcoming large-scale surveys. Auto-encoders are a machine learning model that summarizes an input to ident... Read More about Noise reduction in single-shot images using an auto-encoder.

Empirical constraints on the nucleosynthesis of nitrogen (2023)
Journal Article
Johnson, J. W., Weinberg, D. H., Vincenzo, F., Bird, J. C., & Griffith, E. J. (2023). Empirical constraints on the nucleosynthesis of nitrogen. Monthly notices of the Royal Astronomical Society, 520(1), 782-803. https://doi.org/10.1093/mnras/stad057

We derive empirical constraints on the nucleosynthetic yields of nitrogen by incorporating N enrichment into our previously developed and empirically tuned multizone galactic chemical evolution model. We adopt a metallicity-independent (‘primary’) N... Read More about Empirical constraints on the nucleosynthesis of nitrogen.

Chemical evolution of fluorine in the Milky Way (2022)
Journal Article
Womack, K., Vincenzo, F., Gibson, B., Côté, B., Pignatari, M., Brinkman, H. E., Ventura, P., & Karakas, A. (2023). Chemical evolution of fluorine in the Milky Way. Monthly notices of the Royal Astronomical Society, 518(1), 1543-1556. https://doi.org/10.1093/mnras/stac3180

Fluorine has many different potential sites and channels of production, making narrowing down a dominant site of fluorine production particularly challenging. In this work, we investigate which sources are the dominant contributors to the galactic fl... Read More about Chemical evolution of fluorine in the Milky Way.

Galaxy And Mass Assembly: galaxy morphology in the green valley, prominent rings, and looser spiral arms (2022)
Journal Article
Smith, D., Haberzettl, L., Porter, L. E., Porter-Temple, R., Henry, C. P., Holwerda, B., López-Sánchez, R., Phillipps, S., Graham, A. W., Brough, S., Pimbblet, K. A., Liske, J., Kelvin, L. S., Robertson, C. D., Roemer, W., Walmsley, M., O’Ryan, D., & Géron, T. (2022). Galaxy And Mass Assembly: galaxy morphology in the green valley, prominent rings, and looser spiral arms. Monthly notices of the Royal Astronomical Society, 517(3), 4575-4589. https://doi.org/10.1093/mnras/stac2258

Galaxies fall broadly into two categories: star-forming (blue) galaxies and quiescent (red) galaxies. In between, one finds the less populated 'green valley'. Some of these galaxies are suspected to be in the process of ceasing their star formation t... Read More about Galaxy And Mass Assembly: galaxy morphology in the green valley, prominent rings, and looser spiral arms.

Horizons: nuclear astrophysics in the 2020s and beyond (2022)
Journal Article
Schatz, H., Becerril Reyes, A. D., Best, A., Brown, E. F., Chatziioannou, K., Chipps, K. A., Deibel, C. M., Ezzeddine, R., Galloway, D. K., Hansen, C. J., Herwig, F., Ji, A. P., Lugaro, M., Meisel, Z., Norman, D., Read, J. S., Roberts, L. F., Spyrou, A., Tews, I., Timmes, F. X., …Pignatari, M. (2022). Horizons: nuclear astrophysics in the 2020s and beyond. Journal of Physics G: Nuclear and Particle Physics, 49(11), Article 110502. https://doi.org/10.1088/1361-6471/ac8890

Nuclear astrophysics is a field at the intersection of nuclear physics and astrophysics, which seeks to understand the nuclear engines of astronomical objects and the origin of the chemical elements. This white paper summarizes progress and status of... Read More about Horizons: nuclear astrophysics in the 2020s and beyond.

Formation and Morphology of the First Galaxies in the Cosmic Morning (2022)
Journal Article
Park, C., Lee, J., Kim, J., Jeong, D., Pichon, C., Gibson, B. K., Snaith, O. N., Shin, J., Kim, Y., Dubois, Y., & Few, C. G. (2022). Formation and Morphology of the First Galaxies in the Cosmic Morning. The Astrophysical journal, 937(1), https://doi.org/10.3847/1538-4357/ac85b5

We investigate the formation and morphological evolution of the first galaxies in the cosmic morning (10 ≳ z ≳ 4) using the Horizon Run 5 (HR5) simulation. For galaxies above the stellar mass M ⋆ , min = 2 × 10 9 M ⊙ , we classify them into disk, sph... Read More about Formation and Morphology of the First Galaxies in the Cosmic Morning.

The halo model with beyond-linear halo bias: unbiasing cosmological constraints from galaxy-galaxy lensing and clustering (2022)
Journal Article
Mahony, C., Dvornik, A., Mead, A., Heymans, C., Asgari, M., Hildebrandt, H., Miyatake, H., Nishimichi, T., & Reischke, R. (2022). The halo model with beyond-linear halo bias: unbiasing cosmological constraints from galaxy-galaxy lensing and clustering. Monthly notices of the Royal Astronomical Society, 515(2), 2612–2623. https://doi.org/10.1093/mnras/stac1858

We determine the error introduced in a joint halo model analysis of galaxy-galaxy lensing and galaxy clustering observables when adopting the standard approximation of linear halo bias. Considering the Kilo-Degree Survey, we forecast that ignoring th... Read More about The halo model with beyond-linear halo bias: unbiasing cosmological constraints from galaxy-galaxy lensing and clustering.

Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies (2022)
Journal Article
Abdalla, E., Abellán, G. F., Aboubrahim, A., Agnello, A., Akarsu, Ö., Akrami, Y., Alestas, G., Aloni, D., Amendola, L., Anchordoqui, L. A., Anderson, R. I., Arendse, N., Asgari, M., Ballardini, M., Barger, V., Basilakos, S., Batista, R. C., Battistelli, E. S., Battye, R., Benetti, M., …Zumalacárregui, M. (2022). Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies. Journal of High Energy Astrophysics, 34, 49-211. https://doi.org/10.1016/j.jheap.2022.04.002

The standard Λ Cold Dark Matter (ΛCDM) cosmological model provides a good description of a wide range of astrophysical and cosmological data. However, there are a few big open questions that make the standard model look like an approximation to a mor... Read More about Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies.

Galaxy and mass assembly (GAMA): Self-Organizing Map application on nearby galaxies (2022)
Journal Article
Holwerda, B. W., Smith, D., Porter, L., Henry, C., Porter-Temple, R., Cook, K., Pimbblet, K. A., Hopkins, A. M., Bilicki, M., Turner, S., Acquaviva, V., Wang, L., Wright, A. H., Kelvin, L. S., & Grootes, M. W. (2022). Galaxy and mass assembly (GAMA): Self-Organizing Map application on nearby galaxies. Monthly notices of the Royal Astronomical Society, 513(2), 1972-1984. https://doi.org/10.1093/mnras/stac889

Galaxy populations show bimodality in a variety of properties: stellar mass, colour, specific star-formation rate, size, and Sérsic index. These parameters are our feature space. We use an existing sample of 7556 galaxies from the Galaxy and Mass Ass... Read More about Galaxy and mass assembly (GAMA): Self-Organizing Map application on nearby galaxies.