Zobrazeno 1 - 10
of 140
pro vyhledávání: '"Yan-Fei Jiang"'
Publikováno v:
The Astrophysical Journal Letters, Vol 965, Iss 2, p L29 (2024)
Active galactic nuclei (AGN) light curves observed with different wave bands show that the variability in longer wavelength bands lags the variability in shorter wavelength bands. Measuring these lags, or reverberation mapping, is used to measure the
Externí odkaz:
https://doaj.org/article/1fc21377e1c9470785ec17bed781053f
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 1, p 29 (2024)
Turbulence is crucial for protoplanetary disk dynamics, and vertical shear instability (VSI) is a promising mechanism in outer disk regions to generate turbulence. We use the Athena++ radiation module to study VSI in full and transition disks, accoun
Externí odkaz:
https://doaj.org/article/46a027d815534eec90d80afdecc5e638
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 1, p 99 (2024)
We investigate the dynamical interaction between cosmic rays (CRs) and the multiphase interstellar medium (ISM) using numerical magnetohydrodynamic (MHD) simulations with a two-moment CR solver and TIGRESS simulations of star-forming galactic disks.
Externí odkaz:
https://doaj.org/article/7ee8789dcdf444ad963c9bf679993298
Autor:
Yan-Fei Jiang
Publikováno v:
Galaxies, Vol 11, Iss 5, p 105 (2023)
In this paper, we review our current understanding of the outer envelope structures of massive stars based on three-dimensional (3D) radiation hydrodynamic simulations. We briefly summarize the fundamental issues in constructing hydrostatic one-dimen
Externí odkaz:
https://doaj.org/article/54de5befb71f46698f44d89b973262cb
Publikováno v:
The Astrophysical Journal Letters, Vol 951, Iss 2, p L42 (2023)
The outer envelopes of massive ( M ≳ 10 M _⊙ ) stars exhibit large increases in opacities from forests of lines and ionization transitions (particularly from iron and helium) that trigger near-surface convection zones. One-dimensional (1D) models
Externí odkaz:
https://doaj.org/article/b3a60f3fc9044452a201cd3e6aa0cf97
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 2, p 81 (2023)
The variability of quasar light curves can be used to study the structure of quasar accretion disks. For example, continuum reverberation mapping uses delays between variability in short and long wavelength bands ( short lags) to measure the radial e
Externí odkaz:
https://doaj.org/article/0137c3b51609445081741225efd67845
Publikováno v:
The Astrophysical Journal, Vol 953, Iss 1, p 117 (2023)
Stream–stream collision may be an important prepeak energy dissipation mechanism in tidal disruption events (TDEs). We perform local three-dimensional radiation hydrodynamic simulations in a wedge geometry including the gravity to study stream self
Externí odkaz:
https://doaj.org/article/075781cb87304b9faf0cacdd8b78075a
Publikováno v:
The Astrophysical Journal, Vol 953, Iss 1, p 43 (2023)
We report the detection of a long-timescale negative lag, where the blue bands lag the red bands, in the nearby Seyfert 1 galaxy Fairall 9, with two independent methods. Active Galactic Nuclei (AGNs) light curves show variability over a wide range of
Externí odkaz:
https://doaj.org/article/5a794c9312a54ed1b9b823edd55b3b75
Autor:
Christopher J. White, Patrick D. Mullen, Yan-Fei Jiang, Shane W. Davis, James M. Stone, Viktoriya Morozova, Lizhong Zhang
Publikováno v:
The Astrophysical Journal, Vol 949, Iss 2, p 103 (2023)
We extend the general-relativistic magnetohydrodynamics (GRMHD) capabilities of Athena++ to incorporate radiation. The intensity field in each finite-volume cell is discretized in angle, with explicit transport in both space and angle properly accoun
Externí odkaz:
https://doaj.org/article/08751583e19f4b88b286098481579fb1
Publikováno v:
The Astrophysical Journal, Vol 948, Iss 2, p 120 (2023)
We perform 3D radiation hydrodynamic local shearing-box simulations to study the outcome of gravitational instability (GI) in optically thick active galactic nuclei (AGNs) accretion disks. GI develops when the Toomre parameter Q _T ≲ 1, and may lea
Externí odkaz:
https://doaj.org/article/573070de2acd453885c7c836793dc6bb