Professor Michele Fumagalli's Outputs (10)

The stochastic enrichment of Population II stars (2020)
Journal Article
Welsh, L., Cooke, R., & Fumagalli, M. (2021). The stochastic enrichment of Population II stars. Monthly Notices of the Royal Astronomical Society, 500(4), 5214-5228. https://doi.org/10.1093/mnras/staa3342

We investigate the intrinsic scatter in the chemical abundances of a sample of metal-poor ([Fe/H] < −2.5) Milky Way halo stars. We draw our sample from four historic surveys and focus our attention on the stellar Mg, Ca, Ni, and Fe abundances. Using... Read More about The stochastic enrichment of Population II stars.

MUSE Analysis of Gas around Galaxies (MAGG) - II: Metal-enriched halo gas around z ∼ 1 galaxies (2020)
Journal Article
Dutta, R., Fumagalli, M., Fossati, M., Lofthouse, E. K., Prochaska, J. X., Battaia, F. A., Bielby, R. M., Cantalupo, S., Cooke, R. J., Murphy, M. T., & O’Meara, J. M. (2020). MUSE Analysis of Gas around Galaxies (MAGG) - II: Metal-enriched halo gas around z ∼ 1 galaxies. Monthly Notices of the Royal Astronomical Society, 499(4), 5022-5046. https://doi.org/10.1093/mnras/staa3147

We present a study of the metal-enriched cool halo gas traced by Mg II absorption around 228 galaxies at z ∼ 0.8–1.5 within 28 quasar fields from the MUSE Analysis of Gas around Galaxies survey. We observe no significant evolution in the Mg II equiva... Read More about MUSE Analysis of Gas around Galaxies (MAGG) - II: Metal-enriched halo gas around z ∼ 1 galaxies.

Detecting neutral hydrogen at z ≳ 3 in large spectroscopic surveys of quasars (2020)
Journal Article
Fumagalli, M., Fotopoulou, S., & Thomson, L. (2020). Detecting neutral hydrogen at z ≳ 3 in large spectroscopic surveys of quasars. Monthly Notices of the Royal Astronomical Society, 498(2), 1951-1962. https://doi.org/10.1093/mnras/staa2388

We present a pipeline based on a random forest classifier for the identification of high column density clouds of neutral hydrogen (i.e. the Lyman limit systems, LLSs) in absorption within large spectroscopic surveys of z ≳ 3 quasars. We test the per... Read More about Detecting neutral hydrogen at z ≳ 3 in large spectroscopic surveys of quasars.

Shaping the structure of a GMC with radiation and winds (2020)
Journal Article
Decataldo, D., Lupi, A., Ferrara, A., Pallottini, A., & Fumagalli, M. (2020). Shaping the structure of a GMC with radiation and winds. Monthly Notices of the Royal Astronomical Society, 497(4), 4718-4732. https://doi.org/10.1093/mnras/staa2326

We study the effect of stellar feedback (photodissociation/ionization, radiation pressure and winds) on the evolution of a Giant Molecular Cloud (GMC), by means of a 3D radiative transfer, hydro-simulation implementing a complex chemical network feat... Read More about Shaping the structure of a GMC with radiation and winds.

Quasar Sightline and Galaxy Evolution (QSAGE) survey - II. Galaxy overdensities around UV luminous quasars at z = 1-2 (2020)
Journal Article
Stott, J., Bielby, R., Cullen, F., Burchett, J., Tejos, N., Fumagalli, M., Crain, R., Morris, S., Amos, N., Bower, R., & Prochaska, J. (2020). Quasar Sightline and Galaxy Evolution (QSAGE) survey - II. Galaxy overdensities around UV luminous quasars at z = 1-2. Monthly Notices of the Royal Astronomical Society, 497(3), 3083-3096. https://doi.org/10.1093/mnras/staa2096

We demonstrate that the UV brightest quasars at z = 1–2 live in overdense environments. This is based on an analysis of deep Hubble Space Telescope WFC3 G141 grism spectroscopy of the galaxies along the lines-of-sight to UV luminous quasars in the re... Read More about Quasar Sightline and Galaxy Evolution (QSAGE) survey - II. Galaxy overdensities around UV luminous quasars at z = 1-2.

A limit on Planck-scale froth with ESPRESSO (2020)
Journal Article
Pettini, M., Fumagalli, M., Welsh, L., & Cooke, R. (2020). A limit on Planck-scale froth with ESPRESSO. Monthly Notices of the Royal Astronomical Society, 494(4), 4884-4890. https://doi.org/10.1093/mnras/staa440

Some models of quantum gravity predict that the very structure of space–time is ‘frothy’ due to quantum fluctuations. Although the effect is expected to be tiny, if these space–time fluctuations grow over a large distance, the initial state of a phot... Read More about A limit on Planck-scale froth with ESPRESSO.

A bound on the 12C/13C ratio in near-pristine gas with ESPRESSO (2020)
Journal Article
Pettini, M., Fumagalli, M., Cooke, R., & Welsh, L. (2020). A bound on the 12C/13C ratio in near-pristine gas with ESPRESSO. Monthly Notices of the Royal Astronomical Society, 494(1), 1411-1423. https://doi.org/10.1093/mnras/staa807

Using science verification observations obtained with ESPRESSO at the Very Large Telescope (VLT) in 4UT mode, we report the first bound on the carbon isotope ratio 12C/13C of a quiescent, near-pristine damped Lyα (DLA) system at z = 2.34. We infer a... Read More about A bound on the 12C/13C ratio in near-pristine gas with ESPRESSO.

Studying the ISM at ∼10 pc scale in NGC 7793 with MUSE: I. Data description and properties of the ionised gas (2020)
Journal Article
Della Bruna, L., Adamo, A., Bik, A., Fumagalli, M., Walterbos, R., Östlin, G., Bruzual, G., Calzetti, D., Charlot, S., Grasha, K., Smith, L. J., Thilker, D., & Wofford, A. (2020). Studying the ISM at ∼10 pc scale in NGC 7793 with MUSE: I. Data description and properties of the ionised gas. Astronomy & Astrophysics, 635, Article A134. https://doi.org/10.1051/0004-6361/201937173

Context. Studies of nearby galaxies reveal that around 50% of the total Hα luminosity in late-type spirals originates from diffuse ionised gas (DIG), which is a warm, diffuse component of the interstellar medium that can be associated with various me... Read More about Studying the ISM at ∼10 pc scale in NGC 7793 with MUSE: I. Data description and properties of the ionised gas.

Into the Lyα jungle: exploring the circumgalactic medium of galaxies at z ∼ 4 − 5 with MUSE (2020)
Journal Article
Bielby, R. M., Fumagalli, M., Fossati, M., Rafelski, M., Oppenheimer, B., Cantalupo, S., Christensen, L., Fynbo, J., Lopez, S., Morris, S. L., D’Odorico, V., & Peroux, C. (2020). Into the Lyα jungle: exploring the circumgalactic medium of galaxies at z ∼ 4 − 5 with MUSE. Monthly Notices of the Royal Astronomical Society, 493(4), 5336-5356. https://doi.org/10.1093/mnras/staa546

We present a study of the galaxy environment of 9 strong H I+C IV absorption line systems (16.2 < log(N(HI)) < 21.2) spanning a wide range in metallicity at z ∼ 4 − 5, using MUSE integral field and X-Shooter spectroscopic data collected in a z ≈ 5.26... Read More about Into the Lyα jungle: exploring the circumgalactic medium of galaxies at z ∼ 4 − 5 with MUSE.

Interpreting Observations of Absorption Lines in the Circumgalactic Medium with a Turbulent Medium (2020)
Journal Article
Buie, E., Fumagalli, M., & Scannapieco, E. (2020). Interpreting Observations of Absorption Lines in the Circumgalactic Medium with a Turbulent Medium. Astrophysical Journal, 890(1), Article 33. https://doi.org/10.3847/1538-4357/ab65bc

Single-phase photoionization equilibrium (PIE) models are often used to infer the underlying physical properties of galaxy halos probed in absorption with ions at different ionization potentials. To incorporate the effects of turbulence, we use the M... Read More about Interpreting Observations of Absorption Lines in the Circumgalactic Medium with a Turbulent Medium.