Galaxy formation and evolution

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The Evolutionary Map of the Universe pilot survey

Publications of the Astronomical Society of Australia Cambridge University Press (CUP) 38 (2021) e046

Authors:

Ray P Norris, Joshua Marvil, JD Collier, Anna D Kapińska, Andrew N O’Brien, L Rudnick, Heinz Andernach, Jacobo Asorey, Michael JI Brown, Marcus Brüggen, Evan Crawford, Jayanne English, Syed Faisal ur Rahman, Miroslav D Filipović, Yjan Gordon, Gülay Gürkan, Catherine Hale, Andrew M Hopkins, Minh T Huynh, Kim HyeongHan, M James Jee, Bärbel S Koribalski, Emil Lenc, Kieran Luken, David Parkinson, Isabella Prandoni, Wasim Raja, Thomas H Reiprich, Christopher J Riseley, Stanislav S Shabala, Jaimie R Sheil, Tessa Vernstrom, Matthew T Whiting, James R Allison, CS Anderson, Lewis Ball, Martin Bell, John Bunton, TJ Galvin, Neeraj Gupta, Aidan Hotan, Colin Jacka, Peter J Macgregor, Elizabeth K Mahony, Umberto Maio, Vanessa Moss, M Pandey-Pommier, Maxim A Voronkov
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The properties of polycyclic aromatic hydrocarbons in galaxies: constraints on PAH sizes, charge and radiation fields

Monthly Notices of the Royal Astronomical Society, Volume 504, Issue 4, (2021) pp.5287-5300

Authors:

Rigopoulou, D.; Barale, M.; Clary, D. C.; Shan, X.; Alonso-Herrero, A.; García-Bernete, I.; Hunt, L.; Kerkeni, B.; Pereira-Santaella, M.; Roche, P. F.

Abstract:

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Wolf-Rayet galaxies in SDSS-IV MaNGA. II. Metallicity dependence of the high-mass slope of the stellar initial mass function

arXiv; submitted to ApJ

Authors:

Liang, Fu-Heng; Li, Cheng; Li, Niu; Zhou, Shuang; Yan, Renbin; Mo, Houjun; Zhang, Wei

Abstract:

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EDGE: a new approach to suppressing numerical diffusion in adaptive mesh simulations of galaxy formation

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 501:2 (2020) 1755-1765

Authors:

Andrew Pontzen, Martin P Rey, Corentin Cadiou, Oscar Agertz, Romain Teyssier, Justin Read, Matthew DA Orkney

Abstract:

ABSTRACT We introduce a new method to mitigate numerical diffusion in adaptive mesh refinement (AMR) simulations of cosmological galaxy formation, and study its impact on a simulated dwarf galaxy as part of the ‘EDGE’ project. The target galaxy has a maximum circular velocity of $21\, \mathrm{km}\, \mathrm{s}^{-1}$ but evolves in a region that is moving at up to $90\, \mathrm{km}\, \mathrm{s}^{-1}$ relative to the hydrodynamic grid. In the absence of any mitigation, diffusion softens the filaments feeding our galaxy. As a result, gas is unphysically held in the circumgalactic medium around the galaxy for $320\, \mathrm{Myr}$, delaying the onset of star formation until cooling and collapse eventually triggers an initial starburst at z = 9. Using genetic modification, we produce ‘velocity-zeroed’ initial conditions in which the grid-relative streaming is strongly suppressed; by design, the change does not significantly modify the large-scale structure or dark matter accretion history. The resulting simulation recovers a more physical, gradual onset of star formation starting at z = 17. While the final stellar masses are nearly consistent ($4.8 \times 10^6\, \mathrm{M}_{\odot }$ and $4.4\times 10^6\, \mathrm{M}_{\odot }$ for unmodified and velocity-zeroed, respectively), the dynamical and morphological structure of the z = 0 dwarf galaxies are markedly different due to the contrasting histories. Our approach to diffusion suppression is suitable for any AMR zoom cosmological galaxy formation simulations, and is especially recommended for those of small galaxies at high redshift.
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How robustly can we constrain the low-mass end of the z ∼ 6−7 stellar mass function? The limits of lensing models and stellar population assumptions in the Hubble Frontier Fields

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 501:2 (2020) 1568-1590

Authors:

Lukas J Furtak, Hakim Atek, Matthew D Lehnert, Jacopo Chevallard, Stéphane Charlot
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