Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Astrophysical dust processes"'
Autor:
Thiem Hoang
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 26 (2024)
The unique biosignature of life on Earth is the homochirality of organic compounds, such as amino acids, proteins, and sugars. High-energy spin-polarized (spinup or spindown) electrons (SPEs) from the β decay of radioactive nuclei have been proposed
Externí odkaz:
https://doaj.org/article/b807df20b1714a89b07b717d32b21076
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 146 (2024)
We explore the cosmic evolution of the fraction of dust-obscured star formation predicted by the simba cosmological hydrodynamic simulations featuring an on-the-fly model for dust formation, evolution, and destruction. We find that up to z = 3, our r
Externí odkaz:
https://doaj.org/article/2a7d7f34c89a4cea9e7247489b1106e1
Autor:
Adrienne F. Ertel, Brian D. Fields
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 179 (2024)
Near-Earth supernova blasts which engulf the solar system have left traces of their ejecta in the geological and lunar records. There is now a wealth of data on live radioactive ^60 Fe pointing to a supernova at 3 Myr ago, as well as the recent disco
Externí odkaz:
https://doaj.org/article/8fa5e2c0ba9d4209b1da4406a359060f
Autor:
Jiaqing Bi, Min-Kai Lin
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 76 (2024)
Recent analyses of millimeter-wavelength protoplanetary disk observations have revealed several emission excesses on the previously identified dust rings, referred to as dust shoulders. The prevalence of dust shoulders suggests that they trace a comm
Externí odkaz:
https://doaj.org/article/8cee7f60615c4a8b9e6f9d954684645a
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 66 (2024)
Grains of ice are formed spontaneously when water vapor is injected into a weakly ionized laboratory plasma in which the background gas has been cooled to cryogenic temperatures comparable to those of deep space. These ice grains are levitated indefi
Externí odkaz:
https://doaj.org/article/1e9132b3b8274870aabcb86dd9f87174
Autor:
Thiem Hoang, Bao Truong
Publikováno v:
The Astrophysical Journal, Vol 965, Iss 2, p 183 (2024)
Magnetic fields are ubiquitous in the Universe and are thought to play an important role in various astrophysical processes. Polarization of thermal emission from dust grains aligned with the magnetic field is widely used to measure the 2D magnetic f
Externí odkaz:
https://doaj.org/article/b4cfc8d330d2438e94bd5f2cb7f798db
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 271, Iss 1, p 7 (2024)
We present MDIRK: a multifluid second-order diagonally implicit Runge–Kutta method to study momentum transfer between gas and an arbitrary number ( N ) of dust species. The method integrates the equations of hydrodynamics with an implicit–explici
Externí odkaz:
https://doaj.org/article/75bd200db62345afa6bc2dbc419f720f
Autor:
Megan Newsome, Iair Arcavi, D. Andrew Howell, Jamison Burke, Kishalay De, Yael Dgany, Sara Faris, Joseph Farah, Daichi Hiramatsu, Curtis McCully, Estefania Padilla-Gonzalez, Craig Pellegrino, Giacomo Terreran
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 2, p 239 (2024)
AT 2020mot is a typical UV/optical tidal disruption event (TDE) with no radio or X-ray signatures in a quiescent host. We find an i -band excess and rebrightening along the decline of the light curve which could be due to two consecutive dust echoes
Externí odkaz:
https://doaj.org/article/92112cda3088472a92ff103172812da9
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 2, p 183 (2024)
We report the finding of a new, local diffusion instability in a protoplanetary disk which can operate in a dust fluid, subject to mass diffusion, shear viscosity, and dust–gas drag, provided the diffusivity, viscosity, or both, decrease sufficient
Externí odkaz:
https://doaj.org/article/e77a41162acb44638856ab63ff5b470d
Autor:
Le Ngoc Tram, Thiem Hoang
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
Modern understanding of dust astrophysics reveals that radiative torques (RATs) arising from the radiation–dust interaction can induce two fundamental effects: grain alignment and rotational disruption. Here, we review the recent progress in the th
Externí odkaz:
https://doaj.org/article/68152e55f7904e55aa8fa82640adfbd4