Results 31 to 40 of about 76,004 (221)
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
core +2 more sources
The Conference Blazars through Sharp Multi-Wavelength Eyes
Galaxies, 2016 Blazars are active, galactic nuclei with jets of magnetized, high-energy plasma that flow outward from the center of the host galaxy at near-light speeds.[...]
Alan P. Marscher +2 more
doaj +1 more source
Nuclear coups: dynamics of black holes in galaxy mergers [PDF]
, 2014 We study the dynamical evolution of supermassive black holes (BHs) in merging galaxies on scales of hundreds of kpc to 10 pc, to identify the physical processes that aid or hinder the orbital decay of BHs.
Bellovary, Jillian M. +6 more
core +3 more sources
The Astrophysical Journal, 2023 Dual active galaxy nuclei (dAGNs) trace the population of post-merger galaxies and are the precursors to massive black hole (MBH) mergers, an important source of gravitational waves that may be observed by the Laser Interferometer Space Antenna (LISA ...
Kunyang Li +3 more
doaj +1 more source
NICMOS Observations of Interaction Triggered Star Formation in the Luminous Infrared Galaxy NGC 6090 [PDF]
, 1999 High resolution, 1.1, 1.6, and 2.2 micron imaging of the luminous infrared galaxy NGC 6090 obtained with NICMOS of the Hubble Space Telescope are presented.
Dinshaw, N. +4 more
core +2 more sources
Revealing components of the galaxy population through nonparametric techniques [PDF]
, 2008 The distributions of galaxy properties vary with environment, and are often multimodal, suggesting that the galaxy population may be a combination of multiple components.
Adelman-McCarthy +49 more
core +2 more sources
The Astrophysical Journal, 2023 Growing evidence in support of a connection between active galactic nuclei (AGN) activity and the ram pressure stripping (RPS) phenomenon has been found both observationally and theoretically in the past decades.
Giorgia Peluso +7 more
doaj +1 more source
Triggering active galactic nuclei in galaxy clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 We model the triggering of active galactic nuclei (AGN) in galaxy clusters using the semianalytic galaxy formation model SAGE. We prescribe triggering methods based on the ram pressure galaxies experience as they move throughout the intracluster medium, which is hypothesized to trigger star formation and AGN activity.
Madeline A Marshall +5 more
openaire +3 more sources
Compact Nuclei in Galaxies at Moderate Redshift: I. Imaging and Spectroscopy
, 1998 This study explores the space density and properties of active galaxies to z=0.8. We have investigated the frequency and nature of unresolved nuclei in galaxies at moderate redshift as indicators of nuclear activity such as Active Galactic Nuclei (AGN ...
Cheng F. Z. +6 more
core +2 more sources
The Astrophysical Journal, 2023 Active galactic nuclei (AGNs) are widely believed to be one of the promising acceleration sites of ultrahigh-energy cosmic rays (CRs). Essentially, AGNs are powered by the gravitational energy of matter falling into supermassive black holes. However, the
Xin-Yue Shi +3 more
doaj +1 more source