Outputs (7)

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.