HERSCHEL/SPIRE SUBMILLIMETER SPECTRA OF LOCAL ACTIVE GALAXIES, [PDF]
, 2013 We present the submillimeter spectra from 450 to 1550 GHz of 11 nearby active galaxies observed with the SPIRE Fourier Transform Spectrometer (SPIRE/FTS) on board Herschel.
M. Pereira-Santaella +13 more
semanticscholar +1 more source
A Census of Photometrically Selected Little Red Dots at 4 < z < 9 in JWST Blank Fields
The Astrophysical JournalObservations with the James Webb Space Telescope (JWST) have uncovered numerous faint active galactic nuclei (AGN) at z ∼ 5 and beyond. These objects are key to our understanding of the formation of supermassive black holes (SMBHs), their coevolution ...
Vasily Kokorev +11 more
doaj +1 more source
Modelling the narrow-line regions of active galaxies in the Sloan Digital Sky Survey - I. Sample selection and physical conditions [PDF]
, 2013 Using spectroscopy from the Sloan Digital Sky Survey Data Release Seven, we systematically determine the electron density ne and electron temperature Te of active galaxies and star-forming galaxies while mainly focusing on the narrow-line regions (NLRs).
Zhitai Zhang, Yan-chun Liang, F. Hammer
semanticscholar +1 more source
The Astrophysical Journal Letters, 2023 The Cosmic Evolution Early Release Science program observed the Extended Groth Strip (EGS) with the Mid-Infrared Instrument (MIRI) on the James Webb Space Telescope (JWST) in 2022.
Allison Kirkpatrick +35 more
doaj +1 more source
Narrow-line Seyfert 1 Galaxies and the M_BH - sigma Relation
, 2007 We have studied the location of narrow-line Seyfert 1 (NLS1) galaxies and broad-line Seyfert 1 (BLS1) galaxies on the M_BH - sigma relation of non-active galaxies.
D. Xu, Ferrarese L., S. Komossa, Silk J.
core +1 more source
The search for active black holes in nearby low-mass galaxies using optical and mid-IR data [PDF]
, 2015 We investigated AGN activity in low-mass galaxies, an important regime that can shed light onto BH formation and evolution, and their interaction with their host galaxies.
L. Sartori +6 more
semanticscholar +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
doaj +1 more source
Chemistry in isolation: High CCH/HCO+ line ratio in the AMIGA galaxy CIG 638
, 2014 Multi-molecule observations towards an increasing variety of galaxies have been showing that the relative molecular abundances are affected by the type of activity.
Aladro, R. +6 more
core +1 more source
Supermassive Black Holes in Active Galactic Nuclei. I. The Consistency of Black Hole Masses in Quiescent and Active Galaxies [PDF]
, 2001 We report the first results of a program to measure accurate stellar velocity dispersions in the bulges of the host galaxies of active galactic nuclei (AGNs) for which accurate black hole (BH) masses have been determined via reverberation mapping.
Amri Wandel +11 more
core +2 more sources
Mid-Infrared Selection of Active Galaxies [PDF]
, 2004 Mid-infrared photometry provides a robust technique for identifying active galaxies. While the ultraviolet to mid-infrared (λ ≲ 5 μm) continuum of stellar populations is dominated by the composite blackbody curve and peaks at approximately 1.6 μm, the ...
D. Stern +14 more
semanticscholar +1 more source