Astrophysical: Galaxies

  • Publication
    The Photometric Analysis of the Environment Around Two Dusty Star-forming Galaxies at z ∼ 2
    Studying the environments of dusty star-forming galaxies (DSFGs) provides insight into whether these luminous systems are reliable signposts of large-scale...
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    The photometric properties of isolated early-type galaxies
    Isolated galaxies are important because they probe the lowest density regimes inhabited by galaxies. We define a sample of 36 nearby isolated early-type...
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    The Physical Conditions of Emission-line Galaxies at Cosmic Dawn from JWST/NIRSpec Spectroscopy in the SMACS 0723 Early Release Observations
    We present rest-frame optical emission-line flux ratio measurements for five z > 5 galaxies observed by the James Webb Space Telescope Near-Infared Spectrograph...
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    The physics driving the cosmic star formation history
    We investigate the physics driving the cosmic star formation (SF) history using the more than 50 large, cosmological, hydrodynamical simulations that together...
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    The planetary nebulae and H II regions in NGC 6822 revisited. Clues to AGB nucleosynthesis
    Aims: The chemical behaviour of an ample sample of planetary nebulae (PNe) in NGC 6822 is analysed. Methods: Spectrophotometric data of 11 PNe and two H ii...
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    The population of barred galaxies in the local universe. I. Detection and characterisation of bars
    Context: Bars are very common in the centre of the disc galaxies, and they drive the evolution of their structure. The state-of-the-art imaging and redshift...
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    The Pressure-confined Wind of the Massive and Compact Super Star Cluster M82-A1
    The observed parameters of the young super star cluster M82-A1 and its associated compact H II region are here shown to indicate a low heating efficiency or...
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    The Prevalence of the α-bimodality: First JWST α-abundance Results in M31
    We present initial results from our JWST NIRSpec program to study the α-abundances in the M31 disk. The Milky Way has two chemically-defined disks, the low-α...
  • Publication
    The primordial Helium abundance
    The primordial abundance of 4He, YP, is one of the hottest themes in present-day astronomy, mostly due to its cosmological relevance. The disagreement between...