Results 31 to 40 of about 4,398,607 (320)
FAR-INFRARED LINE SPECTRA OF ACTIVE GALAXIES FROM THE HERSCHEL/PACS SPECTROMETER: THE COMPLETE DATABASE [PDF]
, 2016 We present a coherent database of spectroscopic observations of far-IR fine-structure lines from the Herschel/Photoconductor Array Camera and Spectrometer archive for a sample of 170 local active galactic nuclei (AGNs), plus a comparison sample of 20 ...
J. Fernández-Ontiveros +5 more
semanticscholar +1 more source
BROAD Hβ EMISSION-LINE VARIABILITY IN A SAMPLE OF 102 LOCAL ACTIVE GALAXIES [PDF]
, 2016 A sample of 102 local (0.02 ≤ z ≤ 0.1) Seyfert galaxies with black hole masses MBH > 107M⊙ was selected from the Sloan Digital Sky Survey (SDSS) and observed using the Keck 10 m telescope to study the scaling relations between MBH and host galaxy ...
Jordan N. Runco +9 more
semanticscholar +1 more source
The Astrophysical Journal Letters, 2023 In this paper, we investigate the astrophysical processes of stellar-mass black holes (sMBHs) embedded in advection-dominated accretion flows (ADAFs) of supermassive black holes (SMBHs) in low-luminosity active galactic nuclei.
Jian-Min Wang +5 more
doaj +1 more source
The Origin and Evolution of Giant Radio Galaxies
Frontiers in Astronomy and Space Sciences, 2022 Giant radio galaxies are arguably the least understood of jetted active galactic nuclei (AGN). We propose that radio galaxies are the product of large mergers that do not involve radio galaxies or radio quasars, such as in merging spiral galaxies, while ...
David Garofalo
doaj +1 more source
Chemie Ingenieur Technik, EarlyView., 2023 Let us consider an alternative perspective on climate change: The sum of solar radiation and heat generated by human activity result in a net energy input of 1.96 times that of the Sun on the Earth's surface. The expanding global population is expected to exacerbate this issue. Potential solutions are proposed, including replacement and heat recycling.
Martin Bertau, Gerald Steiner
wiley +1 more source
The Classifications and Some Correlations for Fermi Blazars
Galaxies, 2016 In a recent paper, we constructed the spectral energy distributions (SEDs) for 1425 Fermi blazars. We classify them as low synchrotron peak sources (LSPs) if log ν p ( Hz ) ≤ 14.0, intermediate synchrotron peak sources (ISPs) if 14.0 <
Junhui Fan +5 more
doaj +1 more source
The eMERLIN and EVN View of FR 0 Radio Galaxies
Galaxies, 2021 We present the results from high-resolution observations carried out with the eMERLIN UK-array and the European VLBI network (EVN) for a sample of 15 FR 0s, i.e., compact core-dominated radio sources associated with nearby early-type galaxies (ETGs ...
Ranieri D. Baldi +2 more
doaj +1 more source
Cosmic X-ray surveys of distant active galaxies [PDF]
, 2015 We review results from cosmic X-ray surveys of active galactic nuclei (AGNs) over the past $$\approx 15$$≈15 years that have dramatically improved our understanding of growing supermassive black holes in the distant universe.
W. Brandt, D. Alexander
semanticscholar +1 more source
The distribution and lifetime of powerful radio galaxies as a function of environment and redshift
Scientific Reports, 2018 Correlations between jet power and active time for z
David Garofalo +2 more
doaj +1 more source
Lambda = 3 mm line survey of nearby active galaxies [PDF]
, 2015 We used the IRAM 30m telescope to observe the frequency range [86-116]GHz towards the central regions of the starburst galaxies M83, M82, and NGC253, the AGNs M51, NGC1068, and NGC7469, and the ULIRGs Arp220 and Mrk231.
R. Aladro +10 more
semanticscholar +1 more source