Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Semenov, Vadim"'
Autor:
Semenov, Vadim A.
Modeling unresolved turbulence in astrophysical gasdynamic simulations can improve the modeling of other subgrid processes dependent on the turbulent structure of gas: from flame propagation in the interiors of combusting white dwarfs to star formati
Externí odkaz:
http://arxiv.org/abs/2410.23339
Autor:
Beane, Angus, Johnson, James, Semenov, Vadim, Hernquist, Lars, Chandra, Vedant, Conroy, Charlie
The Milky Way hosts at least two modes in its present day distribution of Fe and alpha-elements. The exact cause of this bimodality is disputed, but one class of explanations involves the merger between the Milky Way and a relatively massive satellit
Externí odkaz:
http://arxiv.org/abs/2410.21580
Bursty star formation at early times can explain the surprising abundance of early UV-bright galaxies revealed by JWST but can also be a reason for the delayed formation of galactic disks in high-resolution cosmological simulations. We investigate th
Externí odkaz:
http://arxiv.org/abs/2410.09205
Autor:
Otero, Álvaro Segovia, Agertz, Oscar, Renaud, Florent, Kraljic, Katarina, Romeo, Alessandro B., Semenov, Vadim A.
Current star formation models are based on the local structure of the interstellar medium (ISM), yet the details on how the small-scale physics propagates up to global galactic-scale properties are still under debate. To investigate this we use {\sma
Externí odkaz:
http://arxiv.org/abs/2410.08266
Autor:
Semenov, Vadim, Zhao, Yiming
The Minkowski problem for a class of unbounded closed convex sets is considered. This is equivalent to a Monge-Amp\`ere equation on a bounded convex open domain with possibly non-integrable given data. A complete solution (necessary and sufficient co
Externí odkaz:
http://arxiv.org/abs/2409.18699
We investigate early, $z > 3$, galaxy formation in a cosmological zoom-in simulation of a close, early-forming Milky Way (MW) analog extracted from TNG50 simulation and re-simulated with detailed modeling of cold interstellar medium (ISM) formation,
Externí odkaz:
http://arxiv.org/abs/2409.18173
We analyze high-resolution hydrodynamics simulations of an isolated disk dwarf galaxy with an explicit model for unresolved turbulence and turbulence-based star formation prescription. We examine the characteristic values of the star formation effici
Externí odkaz:
http://arxiv.org/abs/2407.11125
Autor:
Aung, Han, Mandelker, Nir, Dekel, Avishai, Nagai, Daisuke, Semenov, Vadim, Bosch, Frank C. van den
We explore the evolution of cold streams from the cosmic web that feed galaxies through their shock-heated circumgalactic medium (CGM) at cosmic noon, $z\simeq 1-5$. In addition to the hydrodynamical instabilities and radiative cooling that we have i
Externí odkaz:
http://arxiv.org/abs/2403.00912
Autor:
Chandra, Vedant, Semenov, Vadim A., Rix, Hans-Walter, Conroy, Charlie, Bonaca, Ana, Naidu, Rohan P., Andrae, Rene, Li, Jiadong, Hernquist, Lars
We illustrate the formation and evolution of the Milky Way over cosmic time, utilizing a sample of 10 million red giant stars with full chemodynamical information, including metallicities and $\alpha$-abundances from low-resolution Gaia XP spectra. T
Externí odkaz:
http://arxiv.org/abs/2310.13050
We use a suite of hydrodynamics simulations of the interstellar medium (ISM) within a galactic disk, which include radiative transfer, a non-equilibrium model of molecular hydrogen, and a realistic model for star formation and feedback, to study the
Externí odkaz:
http://arxiv.org/abs/2310.10712