Potential impact of the Sagittarius dwarf galaxy on the formation of young O-rich stars [PDF]
Nature CommunicationsThe Milky Way underwent significant transformations in its early history, characterised by violent mergers and satellite galaxy accretion. However, recent observations reveal notable star formation events over the past 4 Gyr, likely triggered by ...
Tiancheng Sun +12 more
doaj +2 more sources
Revealing the accretion disc corona in Mrk 335 with multi-epoch X-ray spectroscopy [PDF]
, 2015 Active galactic nuclei host an accretion disc with an X-ray producing corona around a supermassive black hole. In bright sources, such as the Seyfert 1 galaxy Mrk 335, reflection of the coronal emission off the accretion disc has been observed ...
Ballantyne, D. R., Keek, L.
core +2 more sources
Limits on luminosity and mass accretion rate of a radiation pressure dominated accretion disc [PDF]
, 2015 There is a maximum for the gravity of a black hole in the vertical direction in the accretion disc. Outflows may probably be driven from the disc if the radiation flux of the disc is greater than a critical value corresponding to the maximal vertical ...
Cao, Xinwu, Gu, Wei-Min
core +2 more sources
Quasi-periodic eruptions from impacts between the secondary and a rigidly precessing accretion disc in an extreme mass-ratio inspiral system [PDF]
Astronomy & Astrophysics, 2023 X-ray quasi-periodic eruptions (QPEs) represent a recently discovered example of extreme X-ray variability associated with supermassive black holes. These are high-amplitude bursts recurring every few hours that are detected in the soft X-ray band from ...
A. Franchini +9 more
semanticscholar +1 more source
Conditions for accretion disc formation and observability of wind-accreting X-ray binaries [PDF]
Publications Astronomical Society of Australia, 2021 We explore the effect of anisotropic wind driving on the properties of accretion onto black holes (BHs) in close binaries. We specifically focus on line-driven winds, which are common in high-mass X-ray binaries (HMXBs).
R. Hirai, I. Mandel
semanticscholar +1 more source
Exploring the tilted accretion disc of AQ Men with TESS [PDF]
Monthly notices of the Royal Astronomical Society, 2021 AQ Men is a nova-like variable that is presumed to have a tilted, precessing accretion disc. Grazing eclipses in this system have been speculated to be useful in exploring the geometry of its accretion disc.
K. Iłkiewicz +10 more
semanticscholar +1 more source
What really makes an accretion disc MAD [PDF]
, 2021 Magnetically arrested accretion discs (MADs) around black holes (BH) have the potential to stimulate the production of powerful jets and account for recent ultra-high-resolution observations of BH environments.
M. Begelman, N. Scepi, J. Dexter
semanticscholar +1 more source
Making massive stars in the Galactic Centre via accretion on to low-mass stars within an accretion disc [PDF]
, 2020 The origin of the population of very massive stars observed within ∼0.4 pc of the supermassive black hole in the Galactic Centre is a mystery. Tidal forces from the black hole would likely inhibit in situ star formation whilst the youth of the massive ...
M. Davies, D. Lin
semanticscholar +1 more source
MHD disc winds can reproduce fast disc dispersal and the correlation between accretion rate and disc mass in Lupus [PDF]
, 2021 The final architecture of planetary systems depends on the extraction of angular momentum and mass-loss processes of the discs in which they form. Theoretical studies proposed that magnetized winds launched from the discs (MHD disc winds) could govern ...
B. Tabone +5 more
semanticscholar +1 more source
The gravitational microlens influence on X-ray spectral line generated by an AGN accretion disc [PDF]
Serbian Astronomical Journal, 2001 The influence of gravitational microlensing on the X-ray spectral line profiles originated from a relativistic accretion disc has been studied. Using a disc model, we show that microlensing can induce noticeable changes in the line shapes when the ...
Popović L.Č. +4 more
doaj +1 more source