Results 91 to 100 of about 6,292 (222)
The Astrophysical JournalWe report on follow-up observations of the Seyfert 1.9 galaxy IC 3599 with the NASA Neil Gehrels Swift mission. The detection of a second X-ray outburst in 2010 by Swift after the first discovery of a bright X-ray outburst in 1990 by ROSAT led to the ...
Dirk Grupe, S. Komossa, Salem Wolsing
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On the variable nature of low luminosity active galactic nuclei
, 2015 Tesis Univ. Granada.
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Emergent Freestanding Complex Oxide Membranes for Multifunctional Applications
Advanced Materials, Volume 38, Issue 16, 17 March 2026.This review surveys freestanding oxide membranes and covers fabrication and three pathways for studies and devices: strain‐free and strained membranes, and van der Waals‐integrated heterostructures. We show how coupled oxide responses map onto these routes and cross‐couple to expand behaviors.
Baowen Li +6 more
wiley +1 more source
Obscured AGN at z < 1.5: X-Ray to Far-infrared SEDs and Host Galaxy Morphologies in the GOODS Fields
The Astrophysical JournalWe present an analysis of spectral energy distributions (SEDs), galaxy light profiles, and visual morphological classifications for 194 X-ray luminous active galactic nuclei (AGN) (intrinsic absorption-corrected $\mathrm{log}({L}_{{\rm{X}},0.5-7\,{\rm ...
William W.H. Jarvis +11 more
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The Bochum Survey of the Southern Galactic Disk: III. Complete Data Release
Astronomische Nachrichten, Volume 347, Issue 3, March 2026.ABSTRACT The Southern Galactic Disk Survey (GDS) monitored a mosaic of 268 fields along a 6°$$ {6}^{{}^{\circ}} $$‐wide stripe in the southern Galactic disk with simultaneous observations in r′$$ {r}^{\prime } $$ and i′$$ {i}^{\prime } $$ (7m≲r′,i′≲18m$$ {7}^{\mathrm{m}}\lesssim {r}^{\prime },{i}^{\prime}\lesssim {18}^{\mathrm{m}} $$) from September ...
Julia Blex +8 more
wiley +1 more source
Monitoring the Morphology of M87* in 2009–2017 with the Event Horizon Telescope
The Astrophysical Journal, 2020 The Event Horizon Telescope (EHT) has recently delivered the first resolved images of M87*, the supermassive black hole in the center of the M87 galaxy. These images were produced using 230 GHz observations performed in 2017 April.
Maciek Wielgus +218 more
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Low-luminosity accretion in black hole X-ray binaries and active galactic nuclei [PDF]
Astrophysics and Space Science, 2005 At luminosities below a few percent of Eddington, accreting black holes switch to a hard spectral state which is very different from the soft blackbody-like spectral state that is found at higher luminosities. The hard state is well-described by a two-temperature, optically thin, geometrically thick, advection-dominated accretion flow (ADAF) in which ...
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An accretion disc-corona model for X-ray spectra of active galactic nuclei
, 2009 The hard X-ray emission of active galactic nuclei (AGN) is believed to originate from the hot coronae above the cold accretion discs. The hard X-ray spectral index is found to be correlated with the Eddington ratio L(bol)/L(Edd), and the hard X-ray ...
Cao, Xinwu, Xinwu Cao
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A Sample of Active Galactic Nuclei with Intermediate-mass Black Holes Extended to z ≈ 0.6
The Astrophysical Journal Supplement SeriesWe present a sample of 930 intermediate-mass black hole (IMBH) active galactic nuclei (AGNs) with BH masses of M _BH ≤ 2 × 10 ^6 M _⊙ , uniformly selected from the Seventeenth Data Release of the Sloan Digital Sky Survey, based on the detection of broad
Wen-Juan Liu +5 more
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Simulating supernova feedback in galaxy disks [PDF]
, 2012 In this thesis I examine supernova feedback in hydrodynamical simulations of galaxy disks. Understanding this process entails the numerical evaluation of cooling in radiative shocks, and we present a set of simulations using two widely used numerical ...
CREASEY, PETER,EDWARD +1 more
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