Results 141 to 150 of about 22,530 (230)
Cluster membership of Seyfert galaxies [PDF]
Symposium - International Astronomical Union, 1978 I would like to comment on very preliminary results concerning the cluster membership of Seyfert galaxies. Two years ago van den Bergh stated in a discussion of the bright classical Seyfert galaxies that these objects were mainly field galaxies. We extend this discussion to about seventy objects in the list of Drs Khachikian and Weedman (Astrophys. J.,
openaire +1 more source
The extent of ionization in simulations of radio-loud AGNs impacting kpc gas discs. [PDF]
Mon Not R Astron Soc, 2022 Meenakshi M +6 more
europepmc +1 more source
Far-infrared properties of optically-selected quasars and Seyfert galaxies [PDF]
Pointed IRAS observations and ground based observations are used to determine the infrared properties of optically selected galaxies and quasars. The use of complete, unbiased, optically selected samples means that statistical tests can be applied to ...
Edelson, R. A., Malkan, M. A.
core +1 more source
Two 100 TeV Neutrinos Coincident with the Seyfert Galaxy NGC 7469
The Astrophysical JournalIn 2013, the IceCube collaboration announced the detection of a diffuse high-energy astrophysical neutrino flux. The origin of this flux is still largely unknown. The most significant individual source is the close-by Seyfert galaxy NGC 1068 at the 4.2 σ
Giacomo Sommani +3 more
doaj +1 more source
Spectra of Seyfert galaxies and Seyfert galaxy candidates
The Astrophysical Journal, 1983 D. E. Osterbrock, O. Dahari
openaire +1 more source
Star formation in Seyfert galaxies [PDF]
An analysis of the IRAS data for a sample of classical (optically selected) Seyfert galaxies is presented. The IRAS fluxes at 25 micron, 60 micron, and 100 micron are found to be uncorrelated or only very weakly correlated with the UV/Optical continuum ...
Espinosa, J. M. Rodriguez +2 more
core +1 more source
Polarization echoes from past nuclear activity in the quasi-periodic eruption source GSN 069
Astronomy & AstrophysicsContext. X-ray quasi-periodic eruptions (QPEs) are repeating, high-amplitude, soft X-ray bursts observed from the nuclei of a dozen nearby low-mass galaxies. Their origin remains a major puzzle in the physics of accretion variability.
Agís-González B. +10 more
doaj +1 more source
Selecting Post-starburst Galaxies Based on Star Formation History
The Astrophysical JournalPost-starburst (PSB) galaxies are galaxies that have undergone a large burst of star formation followed by rapid quenching. Understanding their properties as a population can help us better understand how galaxies evolve to quiescence.
Sara Starecheski +8 more
doaj +1 more source