THE MAN BEHIND THE CURTAIN: X-RAYS DRIVE THE UV THROUGH NIR VARIABILITY IN THE 2013 ACTIVE GALACTIC NUCLEUS OUTBURST IN NGC 2617 [PDF]
, 2013 After the All-Sky Automated Survey for SuperNovae discovered a significant brightening of the inner region of NGC 2617, we began a ∼70 day photometric and spectroscopic monitoring campaign from the X-ray through near-infrared (NIR) wavelengths. We report
B. Shappee +48 more
semanticscholar +1 more source
A Candidate Dual Active Galactic Nucleus At Z=1.175 [PDF]
, 2012 The X-ray source CXOXBJ142607.6+353351 (CXOJ1426+35), which was identified in a 172 ks Chandra image in the Bootes field, shows double-peaked rest-frame optical/UV emission lines, separated by 0.''69 (5.5 kpc) in the spatial dimension and by 690 km s(-1)
Assef, Roberto J. +12 more
core +2 more sources
The Peculiar Variable X-Ray Spectrum of the Active Galactic Nucleus PKS 2005–489
The Astrophysical Journal, 2023 PKS 2005−489 is a well-known, bright southern BL Lac object that has been detected up to TeV energies. In a low-flux state it exhibits the expected multiwavelength double-peaked spectrum in the radio− γ -ray band.
Owen Chase +6 more
doaj +1 more source
Atomic gas fractions in active galactic nucleus host galaxies [PDF]
Monthly notices of the Royal Astronomical Society, 2018 The feedback from an active galactic nucleus (AGN) is frequently invoked as a mechanism through which gas can be heated or removed from a galaxy. However, gas fraction measurements in AGN hosts have yielded mixed support for this scenario.
S. Ellison +3 more
semanticscholar +1 more source
Feedback between Sgr A and B : AGN-Starburst Connection in the Galactic Centre [PDF]
, 2020 Propagation of fast-mode magneto-hydrodynamic (MHD) compression waves is traced in the Galactic Centre. MHD waves produced by the active Galactic nucleus (Sgr A) focus on the molecular clouds such as Sgr B in the central molecular zone, which will trigger star formation, or possibly starburst. MHD waves newly excited by the starburst propagate backward,
arxiv +1 more source
ALMA captures feeding and feedback from the active galactic nucleus in NGC 613 [PDF]
Astronomy & Astrophysics, 2019 We report ALMA observations of CO(3–2) emission in the Seyfert/nuclear starburst galaxy NGC 613, at a spatial resolution of 17 pc, as part of our NUclei of GAlaxies (NUGA) sample.
A. Audibert +13 more
semanticscholar +1 more source
Enhanced Black Hole Mergers in Active Galactic Nucleus Disks due to Precession-induced Resonances
The Astrophysical Journal, 2023 Recent studies have shown that active galactic nucleus (AGN) disks can host sources of gravitational waves. Compact binaries can form and merge in AGN disks through their interactions with the gas and other compact objects in the disk.
Hareesh Gautham Bhaskar +2 more
doaj +1 more source
High-Resolution Imaging of Water Maser Emission in the active galaxies NGC 6240 and M51 [PDF]
The Astrophysical Journal, Volume 815, 124 (6 pp), 2015 December
20, 2016 We present the results of observations of 22GHz H2O maser emission in NGC 6240 and M51 made with the Karl G. Jansky Very Large Array. Two major H2O maser features and several minor features are detected toward the southern nucleus of NGC 6240. These features are redshifted by about 300 km/s from the galaxy's systemic velocity and remain unresolved at ...
arxiv +1 more source
X-Ray Flares in the Long-term Light Curve of Low-luminosity Active Galactic Nucleus M81*
The Astrophysical Journal, 2023 Most active galactic nuclei at the center of the nearby galaxies have supermassive black holes accreting at sub-Eddington rates through hot accretion flows or radiatively inefficient accretion flows, which efficiently produce jets.
Gunjan Tomar, Nayantara Gupta
doaj +1 more source
A Long Decay of X-Ray Flux and Spectral Evolution in the Supersoft Active Galactic Nucleus GSN 069 [PDF]
, 2018 GSN 069 is an optically identified very low-mass active galactic nuclei (AGN) that shows supersoft X-ray emission. The source is known to exhibit a huge X-ray outburst, with flux increased by more than a factor of ∼240 compared to the quiescence state ...
X. Shu +5 more
semanticscholar +1 more source