Steady-state accretion in magnetized protoplanetary disks [PDF]
Astronomy & Astrophysics, 2021 Context. The transition between magnetorotational instability (MRI)-active and magnetically dead regions corresponds to a sharp change in the disk turbulence level, where pressure maxima may form, hence potentially trapping dust particles and explaining ...
Timmy N. Delage +4 more
semanticscholar +1 more source
Stellar Evolution in the Disks of Active Galactic Nuclei Produces Rapidly Rotating Massive Stars [PDF]
, 2021 Stars can either be formed in or captured by the accretion disks in active galactic nuclei (AGNs). These AGN stars are irradiated and subject to extreme levels of accretion, which can turn even low-mass stars into very massive ones (M > 100M ⊙) whose ...
A. Jermyn +3 more
semanticscholar +1 more source
Disk Accretion and the Stellar Birthline [PDF]
The Astrophysical Journal, 1997 We present a simplified analysis of some effects of disk accretion on the early evolution of fully convective, low-mass pre-main-sequence stars. Our analysis builds on the previous seminal work of Stahler, but it differs in that the accretion of material occurs over a small area of the stellar surface, such as through a disk or magnetospheric accretion
Lee Hartmann +2 more
openaire +1 more source
Stellar Disk in the Galactic Center: A Remnant of a Dense Accretion Disk? [PDF]
The Astrophysical Journal, 2003 submitted to ApJ ...
Levin, Yuri, Beloborodov, Andrei M.
openaire +2 more sources
Discovery of Two Different Full Disk Evolutionary Patterns of M-type T Tauri Stars with LAMOST DR8
The Astrophysical Journal, 2023 The full disk, full of gas and dust, determines the upper limit of planet masses, and its lifetime is critical for planet formation, especially for giant planets.
Hasitieer Haerken +4 more
doaj +1 more source
Stellar Evolution in AGN Disks [PDF]
Astrophysical Journal, 2020 Active galactic nuclei (AGNs) are powered by geometrically thin accretion disks surrounding a central supermassive black hole. Here we explore the evolution of stars embedded in these extreme astrophysical environments (AGN stars).
M. Cantiello, A. Jermyn, D. Lin
semanticscholar +1 more source
An Old, Metal-rich Accreted Stellar Component in the Milky Way Stellar Disk
The Astrophysical Journal, 2022 Abstract We study the possibility that the Milky Ways’ cool stellar disk includes mergers with ancient stars. Galaxies are understood to form in a hierarchical manner, where smaller (proto-)galaxies merge into larger ones. Stars in galaxies, like the Milky Way, contain in their motions and elemental abundance tracers of past events and ...
Diane K. Feuillet +3 more
openaire +2 more sources
Black Hole Formation in the Lower Mass Gap through Mergers and Accretion in AGN Disks [PDF]
Astrophysical Journal, 2020 The heaviest neutron stars and lightest black holes expected to be produced by stellar evolution leave the mass range 2.2 M largely unpopulated. Objects found in this so-called lower mass gap likely originate from a distinct astrophysical process.
Y. Yang +5 more
semanticscholar +1 more source
Outflows and particle acceleration in the accretion disks of young stars [PDF]
EPJ Web of Conferences, 2019 Magneto-gas-dynamic (MGD) outflows from the accretion disks of T Tauri stars with fossil large-scale magnetic fileld are investigated. We consider two mechanisms of the outflows: rise of the magnetic flux tubes (MFT) formed in the regions of efficient ...
Khaibrakhmanov Sergey, Dudorov Alexander
doaj +1 more source
On the Observability of Individual Population III Stars and Their Stellar-mass Black Hole Accretion Disks through Cluster Caustic Transits [PDF]
, 2018 We summarize panchromatic Extragalactic Background Light data to place upper limits on the integrated near-infrared surface brightness (SB) that may come from Population III stars and possible accretion disks around their stellar-mass black holes (BHs ...
R. Windhorst +46 more
semanticscholar +1 more source