Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Harley Katz"'
Publikováno v:
The Open Journal of Astrophysics, Vol 7 (2024)
The first few cycles of JWST have identified an overabundance of UV-bright galaxies and a general excess of UV luminosity density at $z\gtrsim10$ compared to expectations from most (pre-JWST) theoretical models. Moreover, some of the brightest high-r
Externí odkaz:
https://doaj.org/article/1248fa01c07c411e837d28ced3b8e323
Autor:
Harley Katz, Joki Rosdahl, Taysun Kimm, Jeremy Blaizot, Nicholas Choustikov, Marion Farcy, Thibault Garel, Martin G. Haehnelt, Leo Michel-Dansac, Pierre Ocvirk
Publikováno v:
The Open Journal of Astrophysics, Vol 6 (2023)
The recent launch of JWST has ushered in a new era of high-redshift astronomy by providing detailed insights into the gas and stellar populations of galaxies in the epoch of reionization. Interpreting these observations and translating them into cons
Externí odkaz:
https://doaj.org/article/52ea67d365a8496398730c9ab42d4381
Autor:
Charles L. Steinhardt, Albert Sneppen, Thorbjørn Clausen, Harley Katz, Martin P. Rey, Jonas Stahlschmidt
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 172 (2024)
Recent studies have reported tension between the presence of luminous, high-redshift galaxies and the halo mass functions predicted by standard cosmology. Here, an improved test is proposed using the presence of high-redshift Balmer breaks to probe t
Externí odkaz:
https://doaj.org/article/3547063d7d13464a8528dd84be1e186f
Publikováno v:
The Astrophysical Journal, Vol 944, Iss 1, p 61 (2023)
Although low-mass star-forming galaxies are the leading candidates of the reionization process, we cannot conclusively rule out high-mass star-forming galaxies as candidates. While most simulations indicate the former is the best candidate, some mode
Externí odkaz:
https://doaj.org/article/3502f831408c472b95140d3524e624df
To understand the impact of radiation feedback during the formation of a globular cluster (GC), we simulate a head-on collision of two turbulent giant molecular clouds (GMCs). A series of idealized radiation-hydrodynamic simulations is performed, wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a9fc89953107562eb377d65e4a3304c
https://ora.ox.ac.uk/objects/uuid:7b5bfd10-fea9-4b24-bf79-ec70589dc104
https://ora.ox.ac.uk/objects/uuid:7b5bfd10-fea9-4b24-bf79-ec70589dc104
Autor:
Jérémy Blaizot, Thibault Garel, Anne Verhamme, Harley Katz, Taysun Kimm, Léo Michel-Dansac, Peter D Mitchell, Joakim Rosdahl, Maxime Trebitsch
The Ly$\alpha$ line is a powerful probe of distant galaxies, which contains information about inflowing/outflowing gas through which Ly$\alpha$ photons scatter. To develop our understanding of this probe, we post-process a zoom-in radiation-hydrodyna
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c7ebe2f97b58f73919eeddbd447ddc48
Recent observations of GN-z11 with JWST/NIRSpec revealed numerous oxygen, carbon, nitrogen, and helium emission lines at $z=10.6$. Using the measured line fluxes, we derive abundance ratios of individual elements within the interstellar medium (ISM)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d6b04af84fe338fa370ae321de3020a
Deriving oxygen abundances from the electron temperature (hereafter the $T_e$-method) is the gold-standard for extragalactic metallicity studies. However, unresolved temperature fluctuations within individual HII regions and across different HII regi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9cca0abb332d98690666949528fc12c
http://arxiv.org/abs/2210.14234
http://arxiv.org/abs/2210.14234
Autor:
Harley Katz, Aayush Saxena, Joki Rosdahl, Taysun Kimm, Jeremy Blaizot, Thibault Garel, Leo Michel-Dansac, Martin Haehnelt, Richard S Ellis, Laura Penterrici, Julien Devriendt, Adrianne Slyz
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 2023, 518 (1), pp.270-285. ⟨10.1093/mnras/stac3019⟩
Monthly Notices of the Royal Astronomical Society, 2023, 518 (1), pp.270-285. ⟨10.1093/mnras/stac3019⟩
We use the SPHINX$^{20}$ cosmological radiation hydrodynamics simulation to study how Lyman Continuum (LyC) photons escape from galaxies and the observational signatures of this escape. We define two classes of LyC leaker: Bursty Leakers and Remnant
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e0886d42294e18d414e424db4142191b
http://arxiv.org/abs/2210.09156
http://arxiv.org/abs/2210.09156
Autor:
Harley Katz, Joakim Rosdahl, Taysun Kimm, Thibault Garel, Jérémy Blaizot, Martin G Haehnelt, Léo Michel-Dansac, Sergio Martin-Alvarez, Julien Devriendt, Adrianne Slyz, Romain Teyssier, Pierre Ocvirk, Nicolas Laporte, Richard Ellis
ALMA observations of z > 6 galaxies hav e rev ealed abnormally high [O III ] 88 μm /[C II ] 158 μm ratios and [C II ] 158 μm deficits compared to local galaxies. The origin of this behaviour is unknown. Numerous solutions have been proposed includ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f3ad01977a2698d14474e748187f1401
https://ora.ox.ac.uk/objects/uuid:6e3458af-136e-48b6-9ed2-8b018b013546
https://ora.ox.ac.uk/objects/uuid:6e3458af-136e-48b6-9ed2-8b018b013546