Results 11 to 20 of about 77,751 (271)
A Multiwavelength Study of Active Galactic Nuclei in Post-merger Remnants
The Astrophysical Journal, 2023 We investigate the role of galaxy mergers in triggering active galactic nuclei (AGN) in the nearby universe. Our analysis is based on a sample of 79 post-merger remnant galaxies with deep X-ray observations from Chandra/XMM-Newton capable of detecting a ...
Wenhao Li +11 more
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Merging Galaxies with Active Nuclei [PDF]
Symposium - International Astronomical Union, 1999 We are investigating a sample of nearby interacting and merging galaxies showing starburst properties and/or nonthermal nuclear activity (e.g. Mrk 231, Mrk 739, Mrk 1027, NGC 2992, Arp 92).
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Properties of Galaxies with Peculiar Nuclei [PDF]
Publications of the Astronomical Society of the Pacific, 1967 In a former note (Sersic and Pastoriza 1965) we published the results of a survey of bright southern galaxies which were inspected for peculiarities in their nuclei. Although the sample was small ( 35 galaxies) it suggested a relationship between the existence of a bar and the presence of abnormal features in their nuclei.
Sérsic, José Luis, 1933-1993 +1 more
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Double-nucleus elliptical MCG-01-12-005 in an X-ray emitting cluster of galaxies [PDF]
, 2015 The scenario of galaxy formation is believed to follow a structure that builds up from the bottom, with large galaxies being formed by several merging episodes of smaller ones.
Bassani, Loredana +3 more
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Interacting Nuclei in Distant Galaxies [PDF]
International Astronomical Union Colloquium, 1990 The interaction of galaxies not only occurs in galactic scales, but also may be linked to the binary cores in active galactic galaxies. The presence of a binary in the center of galaxies was suggested by Begelman, Blandford and Rees (1980). Gaskell (1983) suggests that supermassive binaries may account for the observed structure of emission line ...
Wei Zheng, Steven A. Grandi
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Feedback from Active Galactic Nuclei in Galaxy Groups
Universe, 2021 The co-evolution between supermassive black holes and their environment is most directly traced by the hot atmospheres of dark matter halos. The cooling of the hot atmosphere supplies the central regions with fresh gas, igniting active galactic nuclei ...
Dominique Eckert +4 more
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Galaxies and Their Nuclei [PDF]
Highlights of Astronomy, 1974 Our Extraordinary General Assembly is devoted to the memory of one of the greatest men of science to the genial Polish astronomer - Nicolaus Copernicus. The main service of Copernicus which has made his name immortal was in finding the correct interpretation of the planetary motions we observe.
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Active Galactic Nuclei among Polar-Ring Galaxies [PDF]
Astronomy Letters, 2020 Based on SDSS data, we consider the fraction of active galactic nuclei among polar-ring galaxies. We have found evidence for an excess of Seyfert galaxies and LINERs among polar-ring galaxies compared to ordinary objects. The observed nuclear activity of polar-ring galaxies may be associated with the accretion of gas from the region of the polar ...
Smirnov, D. V., Reshetnikov, V. P.
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Quasi-periodic eruptions from galaxy nuclei
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT I consider quasi-periodic eruptions (QPEs) from galaxy nuclei. All the known cases fit naturally into a picture of accretion from white dwarfs (WDs) in highly eccentric orbits about the central black holes which decay through gravitational wave emission.
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Properties of H II Regions in the Centers of Nearby Galaxies [PDF]
, 1997 As part of an optical spectroscopic survey of nearby, bright galaxies, we have identified a sample of over 200 emission-line nuclei having optical spectra resembling those of giant extragalactic H II regions. Such "H II nuclei," powered by young, massive
Alexei V. Filippenko +15 more
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