Results 81 to 90 of about 85,255 (272)

A quasar companion to the puzzling quasar SDSS J0927+2943

, 2010
We report the discovery of a quasar close to SDSS J0927+2943 (z = 0.713), which is a massive binary / recoiling black hole candidate. The companion quasar is at a projected distance of 125 h_70^{-1} kpc and exhibits a radial velocity difference of ~1400 ...
A. Treves, Bennert, Bogdanovic, Bonoli, Boris, Canalizo, Chieregato, Coil, Cortese, Croom, Decarli, Decarli, Decarli, Djorgovski, Dotti, Foreman, Gallerani, Gavazzi, Heckman, Hennawi, Hickox, Kirkman, Komossa, M. Barattini, Myers, R. Decarli, R. Falomo, Richards, Schlegel, Schneider, Shen, Shen, Shields, Siegmund, Sulentic, Söchting, Söchting, Taylor, Veron-Cetty, Vivek, Wittman, Wolter, Wrobel, York, Zhdanov   +44 more
core   +1 more source

A Hubble Diagram for Quasars [PDF]

Frontiers in Astronomy and Space Sciences, 2018
The cosmological model is at present not tested between the redshift of the farthest observed supernovae (z ~ 1.4) and that of the Cosmic Microwave Background (z ~ 1,100). Here we introduce a new method to measure the cosmological parameters: we show that quasars can be used as "standard candles" by employing the non-linear relation between their ...
Susanna Bisogni, Susanna Bisogni, Guido Risaliti, Guido Risaliti, Elisabeta Lusso   +4 more
openaire   +5 more sources

cDC1 Subtype‐Specific In Vivo Targeting of Liposomes

Advanced Science, Volume 13, Issue 19, 2 April 2026.
Dendritic cells, particularly the cDC1 subtype, offer a promising target for drug delivery via liposomes due to their pivotal role in immune regulation, allowing for amplified therapeutic responses. Herein, we show an integration of physicochemical characterization and cell experiments to achieve effective in vivo cDC1 targeting through anti‐CLEC9A ...
Maximilian Schaaf, Michael Fichter, Lin Jian, Felicia Schön, Carina Jung, Paul Schneider, Kai Speth, Ana Mateos‐Maroto, Volker Mailänder, Kaloian Koynov, Svenja Morsbach, Katharina Landfester   +11 more
wiley   +1 more source

A Close Quasar Pair in a Massive Galaxy Merger at z = 5.7

The Astrophysical Journal Letters
Close quasar pairs are rare products of galaxy mergers in which both supermassive black holes (SMBHs) are actively accreting, offering strong constraints on merger-driven active galactic nuclei evolution.
Minghao Yue, Xiaohui Fan, Anna-Christina Eilers, Feige Wang, Jinyi Yang, Robert A. Simcoe   +5 more
doaj   +1 more source

The First High Redshift Quasar from Pan-STARRS

, 2011
We present the discovery of the first high redshift (z > 5.7) quasar from the Panoramic Survey Telescope and Rapid Response System 1 (Pan-STARRS1 or PS1).
Becker, Bill Sweeney, Chambers, Christopher Waters, De Rosa, Eric Morganson, Eugene Magnier, Fabian Walter, Fan, Fan, Fan, Fan, Fan, Freudling, Gisella De Rosa, Hans-Walter Rix, Heather Flewelling, Ian McGreer, Jiang, Jiang, Jochen Greiner, Kembhavi, Ken Chambers, Klaus Hodapp, Kurk, Kurk, Lang, Mortlock, Nick Kaiser, Paul Price, Price, Richards, Richards, Roberto Decarli, Skrutskie, Trump, Vanden Berk, Venemans, William Burgett, Willott, Willott, Xiaohui Fan, York   +42 more
core   +1 more source

SDSSp J104433.04$-$012502.2 at $z=5.74$ is Gravitationally Magnified by an Intervening Galaxy [PDF]

, 2002
During the course of our optical deep survey program on L$\alpha$ emitters at $z \approx 5.7$ in the sky area surrounding the quasar SDSSp J104433.04$-$012502.2 at $z=5.74$, we found that a faint galaxy with $m_B$(AB) $\approx 25$ is located at \timeform{
Ajki, Masaru, Ando, Hiroyasu, Fujita, Shinobu S., Hayashi, Masahiko, Ichikawa, Shin-ichi, Kakazu, Yuko, Kawabata, Koji S., Kawara, Kimiaki, Komiyama, Yutaka, Murayama, Takashi, Nagao, Tohru, Nishimura, Tetsuo, Ogasawara, Ryusuke, Ohyama, Youichi, Okamura, Sadanori, Oyabu, Sinki, Shioya, Yasuhiro, Taniguchi, Yoshiaki   +17 more
core   +3 more sources

Quasars Probing Quasars. II. The Anisotropic Clustering of Optically Thick Absorbers around Quasars [PDF]

The Astrophysical Journal, 2007
With close pairs of quasars at different redshifts, a background quasar sightline can be used to study a foreground quasar's environment in absorption. We used a sample of 17 Lyman limit systems with column density N_HI > 10^19 cm^-2 selected from 149 projected quasar pair sightlines, to investigate the clustering pattern of optically thick ...
Hennawi, Joseph F., Prochaska, Jason X.
openaire   +2 more sources

On Quasar Masses and Quasar Host Galaxies [PDF]

The Astrophysical Journal, 1998
Accepted for publication in ApJ Letters, 7 pages, aas2pp4 ...
openaire   +2 more sources

Quasars Probing Quasars. IX. The Kinematics of the Circumgalactic Medium Surrounding z ∼ 2 Quasars [PDF]

The Astrophysical Journal, 2018
Abstract We examine the kinematics of the gas in the environments of galaxies hosting quasars at z ∼ 2. We employ 148 projected quasar pairs to study the circumgalactic gas of the foreground quasars in absorption. The sample selects foreground quasars with precise redshift measurements, using emission lines with precision ≲300 km s−1 and
Marie Wingyee Lau, J. Xavier Prochaska, Joseph F. Hennawi   +2 more
openaire   +2 more sources

First In Vivo 23Na Human Imaging at 10.5 T Using a Combined Sodium‐Proton Transceiver Body Array

Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 2429-2441, April 2026.
ABSTRACT Purpose To demonstrate the first in vivo human 23Na MRI at 10.5 T using a novel dual‐tuned transceiver body array and to evaluate a self‐gating approach for respiratory motion compensation, focusing on renal imaging. Methods A custom‐built eight‐channel 23Na‐loop 1H‐dipole transceiver array was designed, constructed, and characterized.
Simon Schmidt, Arcan M. Ertürk, Gregory J. Metzger   +2 more
wiley   +1 more source