Results 151 to 160 of about 796,792 (175)

The Cosmic Microwave Background. [PDF]

Living Rev Relativ, 1998
Jones AW, Lasenby AN.
europepmc   +1 more source

Physics, Astrophysics and Cosmology with Gravitational Waves. [PDF]

Living Rev Relativ, 2009
Sathyaprakash BS, Schutz BF.
europepmc   +1 more source

Atacama Large Aperture Submillimeter Telescope (AtLAST) science: Resolving the hot and ionized Universe through the Sunyaev-Zeldovich effect. [PDF]

Open Res Eur
Di Mascolo L, Perrott Y, Mroczkowski T, Raghunathan S, Andreon S, Ettori S, Simionescu A, van Marrewijk J, Cicone C, Lee M, Nelson D, Sommovigo L, Booth M, Klaassen P, Andreani P, Cordiner MA, Johnstone D, van Kampen E, Liu D, Maccarone TJ, Morris TW, Orlowski-Scherer J, Saintonge A, Smith M, Smith M, Thelen AE, Wedemeyer S.   +26 more
europepmc   +1 more source

The optical variability of radio-loud quasars

, 2013
Ai,  Y. L.,  Minfeng, Gu
core  

An X-ray selected sample of radio-loud quasars

Astronomy and Astrophysics, 2001
We construct the first X-ray selected sample of broad line radio-loud AGN from the EMSS survey. In order to test unifying schemes for radio-loud objects, their spectral and statistical properties (both at and steep spectrum objects) are examined and ...
Anna Wolter, A Celotti
exaly   +2 more sources

Radio-loud and radio-quiet quasars observed by EXOSAT [PDF]

Monthly Notices of the Royal Astronomical Society, 1992
We present results from the spectral analysis of EXOSAT data on 31 quasars, 18 radio-loud and 13 radio-quiet. Simple power-law models with fixed (Galactic) absorption give acceptable fits to the spectra obtained in the 2-10 keV band. Using the results from these fits we have compared the distributions of spectral indices α for the radio-loud and radio ...
G C Stewart, M J L Turner, R D Saxton
exaly   +2 more sources

The relation between extended radio and line emission for radio-loud quasars

Monthly Notices of the Royal Astronomical Society, 2001
We explore the relationship between the extended radio and line emission for a radio-loud quasar sample including both core-dominated and lobe-dominated quasars. A strong correlation is present between the extended radio and broad-line emission. The core
Xinwu Cao, D R Jiang
exaly   +1 more source

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Radio Loud Quasars at High Redshift

1998
We present results from an observational investigation into the evolution of the luminosity function of flat spectrum radio loud quasars based on a new survey for radio loud quasars with z>3. Rather than carry out an indiscriminate redshift campaign on all the radio sources in our sample, we use optical colours to preselect red stellar identifications ...
R. G. Mcmahon, I. M. Hook
openaire   +1 more source

The Nature of Radio‐Intermediate Quasars: What Is Radio‐loud and What Is Radio‐quiet? [PDF]

Astrophysical Journal, 1996
We have performed quasi-simultaneous radio flux density measurements at 2.7 and 10 GHz for all PG quasars with radio flux densities between 4-200 mJy. We find that a large fraction of these sources are variable, flat-spectrum quasars. This brings the total fraction of flat-spectrum quasars with a ratio between radio and optical flux of R>10 - a ...
Heino Falcke
exaly   +3 more sources

X-ray properties of high-redshift Radio Loud and Radio Quiet Quasars observed by Chandra

Journal of High Energy Astrophysics, 2022
Fatma Shaban
exaly