Modeling the response of a standard accretion disc to stochastic viscous fluctuations
Sign Up to like & getrecommendations! Published in 2018 at "New Astronomy"
DOI: 10.1016/j.newast.2017.07.011
Abstract: Abstract The observed variability of X-ray binaries over a wide range of time-scales can be understood in the framework of a stochastic propagation model, where viscous fluctuations at different radii induce accretion rate variability that… read more here.
Keywords: accretion; accretion rate; time; time lag ... See more keywords
Spectral index−mass accretion rate correlation and evaluation of black hole masses in AGNs 3C 454.3 and M 87
Sign Up to like & getrecommendations! Published in 2019 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201935576
Abstract: We present the discovery of correlations between the X-ray spectral (photon) index and mass accretion rate observed in active galactic nuclei (AGNs) 3C~454.3 and M87. We analyzed spectral transition episodes observed in these AGNs using… read more here.
Keywords: accretion rate; index; mass accretion; mass ... See more keywords
KMOS study of the mass accretion rate from Class I to Class II in NGC 1333
Sign Up to like & getrecommendations! Published in 2021 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/202039264
Abstract: Context. The mass accretion rate (Ṁacc) is the fundamental parameter to understand the process of mass assembly that results in the formation of a low-mass star. This parameter has been largely studied in Classical T… read more here.
Keywords: ngc 1333; class; accretion; accretion rate ... See more keywords
The parallel tracks of kHz QPOs in low-mass X-ray binary 4U 1728−34: explorer of the bimodal accretion modes
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa2161
Abstract: Parallel tracks in the relation between the lower kilohertz quasi-periodic oscillation (kHz QPO) frequency ν1 and the X-ray intensity I have been observed in the neutron star low-mass X-ray binary (NS-LMXB) 4U 1728−34, and we… read more here.
Keywords: parallel tracks; accretion; accretion rate; accretion modes ... See more keywords
Observational constraints on the specific accretion-rate distribution of X-ray-selected AGNs
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx1602
Abstract: This paper estimates the specific accretion-rate distribution of AGN using a sample of 4821 X-ray sources from both deep and shallow surveys. The specific accretion-rate distribution is defined as the probability of a galaxy with… read more here.
Keywords: accretion; accretion rate; specific accretion; rate distribution ... See more keywords
The clustering and bias of radio-selected AGN and star-forming galaxies in the COSMOS field
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx2954
Abstract: Dark matter haloes in which galaxies reside are likely to have a significant impact on their evolution. We investigate the link between dark matter haloes and their constituent galaxies by measuring the angular two-point correlation… read more here.
Keywords: cosmos field; forming galaxies; radio; accretion rate ... See more keywords
What is the real accretion rate on to a black hole for low-angular-momentum accretion?
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz050
Abstract: Mass accretion rate is a key parameter in accretion disk theory. It determines black hole accretion mode. In large scale cosmological simulations studying galaxy formation and evolution, Bondi radius can at most be marginally resolved.… read more here.
Keywords: accretion; accretion rate; hole accretion; mass ... See more keywords
Ultraluminous X-ray sources with flat-topped noise and QPO
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz1027
Abstract: We analysed the X-ray power density spectra of five ultraluminous X-ray sources (ULXs) NGC 5408 X-1, NGC 6946 X-1, M 82 X-1, NGC 1313 X-1, and IC 342 X-1 that are the only ULXs that display both flat-topped noise (FTN) and quasi-periodic oscillations (QPOs). We… read more here.
Keywords: accretion rate; flat topped; ray sources; ray ... See more keywords
An extended size–luminosity relation for the reverberation-mapped AGNs: the role of the accretion rate
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz3387
Abstract: For a compiled sample of 120 reverberation-mapped AGNs, the bivariate correlations of the broad-line regions (BLRs) size ($R_{\rm BLR}$) with the continuum luminosity at 5100 A ($L_{5100}$) and the dimensionless accretion rates ($\dot{\mathscr{M}}$) are investigated.… read more here.
Keywords: accretion rate; dot mathscr; beta; relation ... See more keywords