Results 131 to 140 of about 1,444 (209)
The central engines of radio-loud quasars
, 2003 We have assembled a sample of 37 radio-loud quasars that have been imaged with the Hubble Space Telescope in order to investigate their black hole masses, accretion rates, and the structure of their accretion disks.
R. Staubert, L. C. Ho, J.-M. Wang
core +1 more source
Microwave background temperature at a redshift of 6.34 from H2O absorption. [PDF]
Nature, 2022 Riechers DA +6 more
europepmc +1 more source
The transition between BL Lac objects and Flat Spectrum Radio Quasars
, 2010 We study the BL Lac objects detected in the one year all sky survey of the Fermi satellite, with a energy spectral slope alpha_gamma in the [0.1-100 GeV] band greater than 1.2. In the alpha_gamma vs gamma-ray luminosity plane, these BL Lacs occupy the region populated by Flat Spectrum Radio Quasars (FSRQs).
Ghisellini, G. +3 more
openaire +2 more sources
UEG Week 2024 Oral Presentations
United European Gastroenterology Journal, Volume 12, Issue S8, Page 9-200, October 2024.
wiley +1 more source
Jet vs Disc: the Optical Output of Flat-Spectrum Quasars
, 2003 Flat-Spectrum Radio Quasars (FSRQs) are commonly thought of as being dominated at optical/infrared wavelengths by synchrotron emission. Such emission is believed to come from the relativistic jet observed at radio frequencies in many of these objects. We
Whiting, Matthew T. +3 more
core
The Astrophysical Journal Supplement SeriesBlazars are a subject of intense debate, specifically regarding their jet launch and emission mechanisms, and the origins of their γ -ray radiation.
Lixia Zhang +7 more
doaj +1 more source
Electromagnetic counterparts to massive black-hole mergers. [PDF]
Living Rev Relativ, 2022 Bogdanović T, Miller MC, Blecha L.
europepmc +1 more source
, 2010 For a sample of 185 flat-spectrum radio quasars (FSRQs) constructed from the SDSS DR3 quasar catalog, we found a significant correlation between the synchrotron peak luminosity and both the black hole mass and Eddington ratio.
Gu MinFeng, Chen ZhaoYu
core +1 more source
The Far-Infrared emission of Radio Loud and Radio Quiet Quasars
, 2017 Continuum observations at radio, millimetre, infrared and soft X-ray energies are presented for a sample of 22 quasars, consisting of flat and steep spectrum radio loud, radio intermediate and radio quiet objects.
Wilkes, Belinda +3 more
core
Revisiting the Fundamental Planes of Black Hole Activity for Strong Jet Sources
The Astrophysical JournalWhether the X-ray emissions of strong jet sources originate from disk+coronas or jets is still controversial. In this work, we constructed a strong jet sample containing 50 flat-spectrum radio quasars, 51 low-synchrotron-peaked BL Lac objects, and 18 ...
Qing-Chen Long +3 more
doaj +1 more source