Publication: Hot-mode accretion and the physics of thin-disc galaxy formation
Hot-mode accretion and the physics of thin-disc galaxy formation
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Hafen, Z., Stern, J., Bullock, J., Gurvich, A. B., Yu, S., Faucher-Giguère, C.-A., Fielding, D. B., Anglés-Alcázar, D., Quataert, E., Wetzel, A., Starkenburg, T., Boylan-Kolchin, M., Moreno, J., Feldmann, R., El-Badry, K., Chan, T. K., Trapp, C., Kereš, D., & Hopkins, P. F. (2022). Hot-mode accretion and the physics of thin-disc galaxy formation. Monthly Notices of the Royal Astronomical Society, 514(4), 5056–5073. https://doi.org/10.1093/mnras/stac1603
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We use FIRE simulations to study disc formation in z ∼ 0, Milky Way-mass galaxies, and conclude that a key ingredient for the formation of thin stellar discs is the ability for accreting gas to develop an aligned angular momentum distribution via internal cancellation prior to joining the galaxy. Among galaxies with a high fraction (>70 per cent) of their young stars in a thin disc (h/R ∼ 0.1), we find that: (i) hot, virial-temperature gas dominates the inflowing gas mass on halo scales (≳20 kpc), with radiative losses offset by com
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- Hafen, Zachary
- Stern, Jonathan
- Bullock, James
- Gurvich, Alexander B
- Yu, Sijie
- Faucher-Giguère, Claude-André
- Fielding, Drummond B
- Anglés-Alcázar, Daniel
- Quataert, Eliot
- Wetzel, Andrew
- Starkenburg, Tjitske
- Boylan-Kolchin, Michael
- Moreno, Jorge
- Feldmann, Robert
- El-Badry, Kareem
- Chan, T K
- Trapp, Cameron
- Kereš, Dušan
- Hopkins, Philip F
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Hafen, Z., Stern, J., Bullock, J., Gurvich, A. B., Yu, S., Faucher-Giguère, C.-A., Fielding, D. B., Anglés-Alcázar, D., Quataert, E., Wetzel, A., Starkenburg, T., Boylan-Kolchin, M., Moreno, J., Feldmann, R., El-Badry, K., Chan, T. K., Trapp, C., Kereš, D., & Hopkins, P. F. (2022). Hot-mode accretion and the physics of thin-disc galaxy formation. Monthly Notices of the Royal Astronomical Society, 514(4), 5056–5073. https://doi.org/10.1093/mnras/stac1603
