Zobrazeno 1 - 10
of 348
pro vyhledávání: '"Sun, Guochao"'
In fuzzy dark matter (FDM) cosmologies, the dark matter consists of ultralight bosons ($m\lesssim10^{-20}$ eV). The astrophysically large de Broglie wavelengths of such particles hinder the formation of low-mass dark matter halos. This implies a test
Externí odkaz:
http://arxiv.org/abs/2407.17059
Autor:
Feldmann, Robert, Boylan-Kolchin, Michael, Bullock, James S., Çatmabacak, Onur, Faucher-Giguère, Claude-André, Hayward, Christopher C., Kereš, Dušan, Lazar, Alexandres, Liang, Lichen, Moreno, Jorge, Oesch, Pascal A., Quataert, Eliot, Shen, Xuejian, Sun, Guochao
Recent observations with the James Webb Space Telescope (JWST) have uncovered unexpectedly high cosmic star formation activity in the early Universe, mere hundreds of millions of years after the Big Bang. These observations are often understood to re
Externí odkaz:
http://arxiv.org/abs/2407.02674
Autor:
Marszewski, Andrew, Sun, Guochao, Faucher-Giguère, Claude-André, Hayward, Christopher C., Feldmann, Robert
The unprecedented infrared spectroscopic capabilities of JWST have provided high-quality interstellar medium (ISM) metallicity measurements and enabled characterization of the gas-phase mass-metallicity relation (MZR) for galaxies at $z \gtrsim 5$ fo
Externí odkaz:
http://arxiv.org/abs/2403.08853
Autor:
Shen, Xuejian, Vogelsberger, Mark, Borrow, Josh, Hu, Yongao, Erickson, Evan, Kannan, Rahul, Smith, Aaron, Garaldi, Enrico, Hernquist, Lars, Morishita, Takahiro, Tacchella, Sandro, Zier, Oliver, Sun, Guochao, Eilers, Anna-Christina, Wang, Hui
We investigate galaxy sizes at redshift $z\gtrsim 6$ with the cosmological radiation-magneto-hydrodynamic simulation suite THESAN(-HR). These simulations simultaneously capture the reionization of the large-scale intergalactic medium and resolved gal
Externí odkaz:
http://arxiv.org/abs/2402.08717
Bursty star formation -- a key prediction for high-redshift galaxies from cosmological simulations explicitly resolving stellar feedback in the interstellar medium -- has recently been observed to prevail among galaxies at redshift $z \gtrsim 6$. Lin
Externí odkaz:
http://arxiv.org/abs/2401.04204
Autor:
Gandhi, Pratik J., Wetzel, Andrew, Boylan-Kolchin, Michael, Sanderson, Robyn E., Savino, Alessandro, Weisz, Daniel R., Tollerud, Erik J., Sun, Guochao, Faucher-Giguere, Claude-Andre
The shape of the low-mass (faint) end of the galaxy stellar mass function (SMF) or ultraviolet luminosity function (UVLF) at z > 6 is an open question for understanding which galaxies primarily drove cosmic reionisation. Resolved photometry of Local
Externí odkaz:
http://arxiv.org/abs/2309.09940
Autor:
Sun, Guochao
The intensity mapping (IM) technique has been proven to be a powerful addition to the toolkit for understanding the cosmology and astrophysics behind cosmic structure formation. From the nearby universe to the epochs of cosmic dawn and reionization,
Externí odkaz:
https://thesis.library.caltech.edu/15061/1/Understanding_the_Cosmological_Evolution_of_Galaxies_with_Intensity_Mapping.pdf
Autor:
Sun, Guochao, Faucher-Giguère, Claude-André, Hayward, Christopher C., Shen, Xuejian, Wetzel, Andrew, Cochrane, Rachel K.
Recent discoveries of a significant population of bright galaxies at cosmic dawn $\left(z \gtrsim 10\right)$ have enabled critical tests of cosmological galaxy formation models. In particular, the bright end of the galaxy UV luminosity function (UVLF
Externí odkaz:
http://arxiv.org/abs/2307.15305
Probing bursty star formation by cross-correlating extragalactic background light and galaxy surveys
Understanding the star formation rate (SFR) variability and how it depends on physical properties of galaxies is important for developing and testing the theory of galaxy formation. We investigate how statistical measurements of the extragalactic bac
Externí odkaz:
http://arxiv.org/abs/2305.08847
Both observations and simulations have shown strong evidence for highly time-variable star formation in low-mass and/or high-redshift galaxies, which has important observational implications because high-redshift galaxy samples are rest-UV selected a
Externí odkaz:
http://arxiv.org/abs/2305.02713