Results 81 to 90 of about 512 (184)
The shortest detected intra-day variability of active galactic nuclei in the TESS survey
Astronomy & AstrophysicsContext. Active galactic nuclei (AGNs) are known to be variable in almost all wavelengths and timescales. The shortest AGN variability timescale can be used to probe the smallest scale structures within AGNs. Aims. We aim to measure the shortest detected
Yuk Heechan +2 more
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The Astrophysical JournalWe present here the results from a second epoch of phase-referenced VLBA observations of eight Seyfert and LINER galaxies from the KISSR sample. These sources were chosen based on the presence of double peaks or asymmetries in their emission lines as ...
Preeti Kharb +6 more
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Optical colour maps of Seyfert galaxies [PDF]
Astronomy and Astrophysics Supplement Series, 1998 9 pages, 26 figures, LaTeX, uses l-aa.sty, psfig.sty. A&AS, accepted. Grayscale JPEGs included, original color figures (gif or ps format) can be obtained only by anonymous ftp from ftp://oj287.astro.utu.fi/pub ...
openaire +2 more sources
Observations of a Magellanic Corona. [PDF]
Nature, 2022 Krishnarao D +8 more
europepmc +1 more source
Modeling Cosmological Evolution of Jetted Seyfert Galaxies for z ≲ 10
The Astrophysical JournalWe use high-resolution cosmological zoom-in simulations to model mechanical and thermal feedback from active galactic nuclei onto the evolution of Seyfert-type galaxies, studying the morphology of central galaxies growing within dark matter (DM) halos ...
Julianne Goddard +2 more
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Cosmic ray feedback in galaxies and galaxy clusters: A pedagogical introduction and a topical review of the acceleration, transport, observables, and dynamical impact of cosmic rays. [PDF]
Astron Astrophys Rev, 2023 Ruszkowski M, Pfrommer C.
europepmc +1 more source
Intensive Broadband Reverberation Mapping of Fairall 9 with 1.8 yr of Daily Swift Monitoring
The Astrophysical JournalWe present 1.8 yr of near-daily Swift monitoring of the bright, strongly variable Type 1 active galactic nucleus (AGN) Fairall 9. Totaling 575 successful visits, this is the largest such campaign reported to date.
R. Edelson +7 more
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The Astrophysical JournalWe present a detailed imaging analysis of 260 ks of subarcsecond resolution Chandra (ACIS-S) observations of the nearby Seyfert 2 galaxy NGC 5728. Our study focuses on the bright and diffuse soft X-ray emission within the galaxy's inner ∼1 kpc.
Anna Trindade Falcão +4 more
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Soft gamma rays from low accreting supermassive black holes and connection to energetic neutrinos. [PDF]
Nat Commun, 2021 Kimura SS, Murase K, Mészáros P.
europepmc +1 more source
Fast, dust-poor outflows in the local candidate dual AGN MCG-03-34-64 observed with VLT/ERIS
Astronomy & AstrophysicsWe present VLT/ERIS integral field unit (IFU) J-band observations of MCG-03-34-64, a nearby (z = 0.0167) Seyfert galaxy hosting a candidate dual active galactic nucleus (AGN) system with a separation of ∼100 pc between the nuclei, which are detected in ...
Lamperti I. +30 more
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