Results 51 to 60 of about 352 (180)
Tidal disruption flares as the source of ultra-high energy cosmic rays
EPJ Web of Conferences, 2012 The optical spectral energy distributions of two tidal disruption flares identified by van Velzen et al. (2011) in archival SDSS data, are found to be well-fit by a thin-accretion-disk model.
Farrar G.R.
doaj +1 more source
Advanced Optical Materials, Volume 14, Issue 23, 19 June 2026.Structural color generation is an emerging field for digital display and printing applications. This report presents a novel truncated‐cone design and the first use of GaP sandwiched between two layers of TiO2, demonstrating ultra‐bright, tunable colors with a record color gamut.
Md Rumon Miah +2 more
wiley +1 more source
The flaring drill in the Galactic centre
Astronomy & AstrophysicsContext. The mini-cavity is a low-density region observed in the complex of streams of ionized gas around the Galactic central supermassive black hole, Sgr A★, known as the mini-spiral.
Haas Jaroslav +3 more
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GRB 191019A: A Short Gamma-Ray Burst in Disguise from the Disk of an Active Galactic Nucleus
The Astrophysical Journal Letters, 2023 Long and short gamma-ray bursts (GRBs), canonically separated at around 2 s duration, are associated with different progenitors: the collapse of a massive star and the merger of two compact objects, respectively. GRB 191019A was a long GRB ( T _90 ∼ 64 s)
Davide Lazzati +3 more
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Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events
Astronomische Nachrichten, Volume 347, Issue 5, June 2026.ABSTRACT Extragalactic nuclear transients that exhibit repeating outbursts can be modeled as the repeated dynamical interaction between bound stars and supermassive black holes (SMBHs). A subset of these transients, with recurrence timescales of months‐to‐years, have been explained as accretion flares from the repeated tidal stripping of a star by an ...
Ananya Bandopadhyay +4 more
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The Orientation of Accretion Disks Relative to Dust Disks in Radio Galaxies
, 2002 2 pages, 1 figure. To appear in "Active Galactic Nuclei, from Central Engine to Host Galaxy", eds Collin, Combes & Shlosman.
openaire +2 more sources
How surface density of galaxy disks affects metallicity? Outflow and Accretion [PDF]
Proceedings of the International Astronomical Union, 2015 AbstractIn this study, we examine the effect of surface density of disks on chemical evolution of galaxies. We find that, higher surface brightness galaxies on average possess higher gas-phase metallicity compared to lower surface brightness galaxies with the same stellar and gas mass.
Po-Feng Wu +3 more
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A Face-on Accretion Disk Geometry Revealed by Millimeter-wave Periodicity in Sgr A∗
The Astrophysical JournalWe analyzed 77 epochs of Atacama Large Millimeter/submillimeter Array archival data to investigate flux variability in Sagittarius A ^∗ , the supermassive black hole at the Galactic center.
Kazuki Yanagisawa +5 more
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Application of the Disk Instability Model to All Quasiperiodic Eruptions
The Astrophysical Journal, 2023 After the first quasiperiodic eruption (QPE; GSN 069) was reported in 2019, four other sources have been identified as a QPE or a candidate. However, the physics behind QPEs is still unclear, although several models have been proposed.
Xin Pan, Shuang-Liang Li, Xinwu Cao
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Quantifying the Impact of Relativistic Precession on Tidal Disruption Event Light Curves
Astronomische Nachrichten, Volume 347, Issue 5, June 2026.ABSTRACT The tidal field of a black hole can turn a star into a gas stream whose orbit can precess, especially if the a black hole is rapidly spinning. In this work, we investigate the impact of precession on the light curves of tidal disruption events (TDE).
Diego Calderón +4 more
wiley +1 more source