Results 121 to 130 of about 515 (214)

Dichotomy of Radio-Loud and Radio-Quiet Quasars in the Four Dimensional Eigenvector One (4DE1) Parameter Space [PDF]

A Dissertation/Thesis Submitted to the Office of Postgraduate Program of Space Science and Geospatial Institute Entoto Observatory and Research Center Department of Astronomy and Astrophysics in affiliation with Addis Ababa UniversityQuasars, the ...
Terefe Mengistue, Shimeles
core  

H-AMR FORGE’d in FIRE. I. Magnetic State Transitions, Jet Launching, and Radiative Emission in Super-Eddington, Highly Magnetized Quasar Disks Formed from Cosmological Initial Conditions

The Astrophysical Journal
Quasars are powered by supermassive black hole (SMBH) accretion disks, yet standard thin disk models are inconsistent with many observations. Recently, P. F. Hopkins et al.
Nicholas Kaaz, Matthew Liska, Alexander Tchekhovskoy, Philip F. Hopkins, Jonatan Jacquemin-Ide   +4 more
doaj   +1 more source

QuasAr Odyssey: the origin of fluorescence and its voltage sensitivity in microbial rhodopsins. [PDF]

Nat Commun, 2022
Silapetere A, Hwang S, Hontani Y, Fernandez Lahore RG, Balke J, Escobar FV, Tros M, Konold PE, Matis R, Croce R, Walla PJ, Hildebrandt P, Alexiev U, Kennis JTM, Sun H, Utesch T, Hegemann P.   +16 more
europepmc   +1 more source

A physical model for active galactic nuclei with double-peaked broad emission lines [PDF]

, 2006
The double-peaked broad emission lines are usually thought to be linked to accretion disks; however, the local viscous heating in the line-emitting disk portion is usually insufficient for the observed double-peaked broad-line luminosity in most sources.
Wang, Ting-Gui, Cao, Xinwu
core  

Disappointment over double quasar [PDF]

Nature, 1986
openaire   +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  

Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). V. Quasar Luminosity Function and Contribution to Cosmic Reionization at z = 6 [PDF]

, 2018
We present new measurements of the quasar luminosity function (LF) at z ̃ 6 over an unprecedentedly wide range of the rest-frame ultraviolet luminosity M 1450 from -30 to -22 mag.
Kohno, K., Murayama, H., Strauss, M., Komiyama, Y., Izumi, T., Silverman, J., Sugiyama, N., Utsumi, Y., Noboriguchi, A., Tait, P., Iwasawa, K., Tang, J., Ono, Y., Schulze, A., Tanaka, M., Imanishi, M., Kikuta, S., Minezaki, T., Harikane, Y., Price, P., Bosch, J., Kato, N., Niida, M., Matsuoka, Y., Furusawa, H., Akiyama, M., Kashikawa, N., Asami, N., Nishizawa, A., Toba, Y., Kawaguchi, T., Takata, T., Gunn, J., Takada, M., Wang, S., Miyazaki, S., Yamashita, T., Sameshima, H., Onoue, M., Lupton, R., Shirakata, H., Nagao, T., Ouchi, M., Goto, T., Ikeda, H., Oguri, M., Lee, C.   +46 more
core  

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

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