Results 121 to 130 of about 512 (214)

The time-delay of the gravitationally lensed double quasar UM 673

, 2008
This paper has been ...
Akhunov, T. A., Schmidt, R. W., Burkhonov, O., Gaynullina, E. R., Gottloeber, S., Mirtadjieva, K., Nuritdinov, S. N., Tadjibaev, I., Wambsganss, J., Wisotzki, L., Bruevich, V. V., Gusev, A. S., Sergeyev, A., Smirnov, G.   +13 more
openaire   +2 more sources

Radio Counterparts of Ultraluminous X-Ray Sources in Nearby Galaxies

The Astrophysical Journal
Radio surveys of ultraluminous X-ray sources (ULXs) allow us to find supercritically accreting compact objects (SS 433/W50-like systems) or stripped nuclear black holes in nearby galaxies. We identified 21 such objects by crossmatching a ULX catalog with
Yijia Zhang, Hua Feng, Ailing Wang, Roberto Soria   +3 more
doaj   +1 more source

New optical surveys for gravitationally lensed quasars

, 2002
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2002.Includes bibliographical references (p. 209-215).This thesis describes four new optical surveys for gravitationally lensed quasars.
Morgan, Nicholas D., 1975-
core  

A Massive Protocluster Anchored by a Luminous Quasar at z = 6.63

The Astrophysical Journal Letters
Protoclusters, the progenitors of galaxy clusters, trace large scale structures in the early Universe and are important to our understanding of structure formation and galaxy evolution. To date, only a handful of protoclusters have been identified in the
Feige Wang, Jinyi Yang, Joseph F. Hennawi, Xiaohui Fan, Minghao Yue, Eduardo Bañados, Shane Bechtel, Fuyan Bian, Sarah Bosman, Jaclyn B. Champagne, Frederick B. Davies, Roberto Decarli, Emanuele Paolo Farina, Chiara Mazzucchelli, Bram Venemans, Fabian Walter   +15 more
doaj   +1 more source

Evidence for quasar fast outflows being accelerated at the scale of tens of parsecs. [PDF]

Sci Adv, 2022
He Z, Liu G, Wang T, Mou G, Green R, Bian W, Wang H, Ho LC, Sun M, Shen L, Arav N, Chen C, Wu Q, Guo H, Lin Z, Li J, Yi W.   +16 more
europepmc   +1 more source

Characterising the host galaxies of type II quasars [PDF]

, 2014
AGN are thought to play an essential role in the evolution of galaxies. Despite this, the means by which the nuclear activity is triggered remains a matter of much debate.
Bessiere, Patricia
core  

THE RADIO STRUCTURE OF EXTENDED QUASARS .2. THE RADIO-EMISSION ON PC-SCALES AND KPC-SCALES

, 1992
VLBI and VLA observations of the nuclear and overall radio structures are presented for eight quasars possessing large double-lobed radio emission. On milli-arcsec scales, the nuclei of five sources show an asymmetric (core-jet) morphology, one has a ...
SCHILIZZI, RT, MILEY, GK, HOOIMEYER, JRA, BARTHEL, PD   +3 more
core   +1 more source

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

Limits on MACHOs from microlensing in the double quasar Q0957+561

, 1998
10 pages, 4 figures, accepted by Astronomy & ...
Schmidt, Robert, Wambsganss, Joachim
openaire   +2 more sources

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