Results 131 to 140 of about 512 (214)

The Canada-France High-z Quasar Survey: Nine New Quasars and the Luminosity Function at Redshift 6

, 2010
International audienceWe present discovery imaging and spectroscopy for nine new z ∼ 6 quasars found in the Canada–France High-z Quasar Survey (CFHQS) bringing the total number of CFHQS quasars to 19.
Delfosse, X., Jacqueline Bergeron, Reylé, C., Omont, A., Loic Albert, David Crampton, Thierry Forveille, Albert, L., Céline Reylé, Philippe Delorme, John B. Hutchings, Mclure, R., David Schade, Bergeron, J., Schad, D., Forveille, T., Hutchings, J.B., Willott, C.J., Alain Omont, Chris J. Willott, Delorme, P., Xavier Delfosse, Ross J. McLure   +22 more
core   +1 more source

Two New Gravitationally Lensed Double Quasars from the Sloan Digital Sky Survey [PDF]

, 2006
We report the discoveries of the two-image gravitationally lensed quasars, SDSS J0746+4403 and SDSS J1406+6126, selected from the Sloan Digital Sky Survey (SDSS).
Oguri, Masamune, White, Richard L., Richards, Gordon T., Kayo, Issha, Schneider, Donald P., York, Donald G., Hall, Patrick B., Inada, Naohisa, Kochanek, Christopher S., Becker, Robert H.   +9 more
core  

Outflow and hot dust emission in high redshift quasars

, 2013
Correlations of hot dust emission with outflow properties are investigated, based on a large z similar to 2 non-broad absorption line quasar sample built from the Wide-field Infrared Survey and the Sloan Digital Sky Survey data releases.
Wang, Tinggui, Kai Zhang, Xing, Feijun, Shaohua Zhang, Zhang, Shaohua, Huiyuan Wang, Wang, Huiyuan, Zhou, Hongyan, Feijun Xing, Hongyan Zhou, Zhang, Kai, Tinggui Wang   +11 more
core  

Minor contribution of quasars to ionizing photon budget at z 3c 6: update on quasar luminosity function at the faint end with subaru/suprime-Cam

, 2017
We constrain the quasar contribution to the cosmic reionization based on our deep optical survey of z ~ 6 quasars down to z R = 24.15 using Subaru/Suprime-Cam in three UKIDSS-DXS fields covering 6.5 deg2. In Kashikawa et al.
Kashikawa, Nobunari, Uchiyama, Hisakazu, Imanishi, Masatoshi, Ishikawa, Shogo, Matsuoka, Yoshiki, Tang, Ji-jia, Toshikawa, Jun, Tanaka, Masayuki, Kikuta, Satoshi, Im, Myungshin, Harikane, Yuichi, Ouchi, Masami, Onoue, Masafusa, Niino, Yuu, Willott, Chris J., Furusawa, Hisanori, Hibon, Pascale, Ono, Yoshiaki, Nagao, Tohru   +18 more
core   +1 more source

Assigning Degrees of Stochasticity to Blazar Light Curves in the Radio Band Using Complex Networks. [PDF]

Entropy (Basel), 2022
Acosta-Tripailao B, Max-Moerbeck W, Pastén D, Moya PS.   +3 more
europepmc   +1 more source

Disappointment over double quasar [PDF]

Nature, 1986
openaire   +1 more source

A survey for large-separation lensed FIRST quasars - II. Magnification bias and redshift distribution

, 2002
The statistics of large-separation gravitational lensing are a powerful tool for probing mass distributions on the scale of galaxy clusters. In this paper we refine the analysis of our survey for large-separation (>5 arcsec) lensed FIRST ...
Prada, Francisco, Ofek, Eran O., Maoz, Dan, Rix, Hans-Walter   +3 more
core  

The double nucleus of ARP 220 unveiled [PDF]

, 1990
IR imaging at the f/415 focus of the Palomar 200 inch telescope with 0."39 x 0."49 resolution is used to determine that the ultraluminous IRAS galaxy Arp 220 has a double nucleus with separation 0."95. The presence of two closely separated nuclei (330 pc)
Carico, D. P., Neugebauer, G., Graham, James R., Soifer, B. T., Wilson, T. D., Matthews, K.   +5 more
core  

A massive quiescent galaxy at redshift 4.658. [PDF]

Nature, 2023
Carnall AC, McLure RJ, Dunlop JS, McLeod DJ, Wild V, Cullen F, Magee D, Begley R, Cimatti A, Donnan CT, Hamadouche ML, Jewell SM, Walker S.   +12 more
europepmc   +1 more source

Radio variability in the nuclei of double radio galaxies and quasars [PDF]

Monthly Notices of the Royal Astronomical Society, 1980
R. G. Hine, P. A. G. Scheuer
openaire   +1 more source