Results 61 to 70 of about 491,052 (394)

Fountain-driven gas accretion by the Milky Way

open access: yesEPJ Web of Conferences, 2012
Accretion of fresh gas at a rate of ∼ 1M☉yr−1 is necessary in star-forming disc galaxies, such as the Milky Way, in order to sustain their star-formation rates.
Ciotti L.   +5 more
doaj   +1 more source

Accretion disc atmospheres and winds in low‐mass X‐ray binaries [PDF]

open access: yes, 2015
In the last decade, X-ray spectroscopy has enabled a wealth of discoveries of photoionised absorbers in X-ray binaries. Studies of such accretion disc atmospheres and winds are of fundamental importance to understand accretion processes and possible ...
M. D. Trigo, L. Boirin
semanticscholar   +1 more source

The Impact of Accretion Disc Winds on the Optical Spectra of Cataclysmic Variables [PDF]

open access: yes, 2015
Here, I present Monte Carlo radiative transfer simulations designed to assess the likely impact of accretion disc winds on the optical spectra of high-state CVs.
J. Matthews   +4 more
semanticscholar   +1 more source

Line-driven disc wind in near-Eddington active galactic nuclei: decrease of mass accretion rate due to powerful outflow [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2018
Based on recent X-ray observations, ultrafast outflows from supermassive black holes are expected to have enough energy to dramatically affect their host galaxy but their launch and acceleration mechanisms are not well understood.
Mariko Nomura, K. Ohsuga, C. Done
semanticscholar   +1 more source

Quasiperiodic Oscillations and Dynamics of Test Particles around Quasi- and Non-Schwarzschild Black Holes

open access: yesUniverse, 2023
One of the open problems in black hole physics is testing spacetime around black holes through astrophysical observations in the strong field regime. In fact, black holes cannot produce radiation themselves in the electromagnetic spectrum.
Sardor Murodov   +3 more
doaj   +1 more source

Photon bubbles in accretion discs [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 1998
7 pages, LaTeX, 1 eps figure, mn.sty, submitted to ...
openaire   +2 more sources

Accretion Disc Wind Variability in the States of the Microquasar GRS 1915+105

open access: yes, 2011
Continuing our study of the role and evolution of accretion disc winds in the microquasar GRS 1915+105, we present high-resolution spectral variability analysis of the beta and gamma states with the Chandra High Energy Transmission Grating Spectrometer ...
Andrew J. Petschek   +62 more
core   +1 more source

Mass-loss from advective accretion disc around rotating black holes [PDF]

open access: yes, 2015
We examine the properties of the outflowing matter from an advective accretion disc around a spinning black hole. During accretion, rotating matter experiences centrifugal pressure supported shock transition that effectively produces a virtual barrier ...
R. Aktar, Santabrata Das, A. Nandi
semanticscholar   +1 more source

Outbursts of irradiated accretion discs [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 1998
5 pages, 2 figures. Accepted for publication in MNRAS.
openaire   +3 more sources

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

open access: yesFEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho   +3 more
wiley   +1 more source

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