Results 51 to 60 of about 91,098 (240)

Quasars and their host galaxies [PDF]

, 2006
This review attempts to describe developments in the fields of quasar and quasar host galaxies in the past five. In this time period, the Sloan and 2dF quasar surveys have added several tens of thousands of quasars, with Sloan quasars being found to z>6. Obscured, or partially obscured quasars have begun to be found in significant numbers.
arxiv   +1 more source

The Cosmic Ultraviolet Baryon Survey (CUBS). VIII. Group Environment of the Most Luminous Quasars at z ≈ 1

The Astrophysical Journal
We investigate the group-scale environment of 15 luminous quasars (luminosity L _3000 > 10 ^46 erg s ^−1 ) from the Cosmic Ultraviolet Baryon Survey (CUBS) at redshift z ≈ 1.
Jennifer I-Hsiu Li, Sean D. Johnson, Erin Boettcher, Sebastiano Cantalupo, Hsiao-Wen Chen, Mandy C. Chen, David R. DePalma, Zhuoqi (Will) Liu, Nishant Mishra, Patrick Petitjean, Zhijie Qu, Gwen C. Rudie, Joop Schaye, Fakhri S. Zahedy   +13 more
doaj   +1 more source

Polypept(o)ide‐Based Core–Shell Bottlebrush Polymers: A Versatile Platform for Drug Encapsulation

Macromolecular Bioscience, EarlyView.
This study developed polypept(o)ide‐based core–shell brushes (CSBs) with tunable sizes (Rh: 17–70 nm) for hydrophobic drug delivery. CSBs achieved 10% dasatinib loading through π–π interactions, enabling sustained release over 72 h. Notably, CSB‐dasatinib complexes showed comparable cell viability reduction to the free drug in U‐87 MG cells ...
Bonan Zhao, Jingyuan Wei, Rüdiger Berger, Lin Jian, Kaloian Koynov, Heyang Zhang, Matthias Barz   +6 more
wiley   +1 more source

A slitless spectroscopic survey for quasars near quasars

, 2008
We present the results of the Quasars near Quasars (QNQ) survey, a CCD-based slitless spectroscopic survey for faint ...
Adelberger, Appenzeller, Baade, Barbieri, Barger, Becker, Bergeron, Bohuski, Bongiovanni, Chand, Ciliegi, Clowes, Clowes, Cowie, Crampton, Crampton, Croom, Crotts, D'Odorico, D'Odorico, Dinshaw, F. Selman, Francis, G. Worseck, Gaskell, Gratton, Hawkins, Hazard, Hazard, Hazard, Heap, Hennawi, Hennawi, Hennawi, Hewett, Hewett, Hewitt, Hook, Horne, Jakobsen, Jakobsen, Jakobsen, Jakobsen, Jauncey, Jiang, Kim, Krumpe, L. Wisotzki, La Franca, Landolt, Liske, Lopez, Maza, Maza, McIntosh, McMahon, Morris, Murphy, Osmer, Osmer, Osmer, Pascual, Pichon, Prescott, Reimers, Reimers, Richards, Richards, Salzer, Schmidt, Schmidt, Schneider, Schneider, Schneider, Sharp, Shaver, Smette, Sramek, Steidel, Storrie-Lombardi, Szokoly, Trump, Tytler, Vanden Berk, Véron, Warren, Williger, Williger, Wisotzki, Wisotzki, Wolf, Wolf, Worseck, Worseck, Wright, Zheng, Zitelli   +96 more
core   +2 more sources

Using a complete spectroscopic survey to find red quasars and test the KX method [PDF]

, 2007
We present an investigation of quasar colour-redshift parameter space in order to search for radio-quiet red quasars and to test the ability of a variant of the KX quasar selection method to detect quasars over a full range of colour without bias. This is achieved by combining IRIS2 imaging with the complete Fornax Cluster Spectroscopic Survey to probe
arxiv   +1 more source

The Study of the Circumgalactic Medium with Quasar Pairs

The Astrophysical Journal Supplement Series, 2023
We have collected 10,025 foreground–background quasar pairs with projected distances d _p < 500 kpc from the large quasar catalog of the Sloan Digital Sky Survey DR16Q. We investigate the properties of the Mg ii absorption lines with W _r > 0.15 Å around
Zhi-Fu Chen, Huan-Chang Qin, Jin-Ting Cai, Yu-Tao Zhou, Zhe-Geng Chen, Ting-Ting Pang, Zhi-Wen Wang, Kang-Fa Cheng   +7 more
doaj   +1 more source

Quantitative susceptibility mapping in magnetically inhomogeneous tissues

Magnetic Resonance in Medicine, EarlyView.
Abstract Purpose Conventional quantitative susceptibility mapping (QSM) methods rely on simplified physical models that assume isotropic and homogeneous tissue properties, leading to artifacts and inaccuracies in biological tissues. This study aims to develop and evaluate DEEPOLE, a deep learning–based method that incorporates macroscopically ...
Thomas Jochmann, Fahad Salman, Michael G. Dwyer, Niels Bergsland, Robert Zivadinov, Jens Haueisen, Ferdinand Schweser   +6 more
wiley   +1 more source

Colors of 2625 Quasars at 0

, 2000
We present an empirical investigation of the colors of quasars in the Sloan Digital Sky Survey (SDSS) photometric system. The sample studied includes 2625 quasars with SDSS photometry.
A. J. Connolly, Adrian Pope, Alan Uomoto, Alexander S. Szalay, Aronne Merrelli, Avery Meiksin, Becker R. H., Boyle B. J., Boyle B. J., Brian Yanny, Chris Stoughton, Christopher Stubbs, Christy Tremonti, Constance M. Rockosi, D. Q. Lamb, Daniel C. Long, Daniel E. Vanden Berk, David J. Schlegel, Donald G. York, Donald P. Schneider, Douglas Finkbeiner, Fan X., Francis P., Francis P. J., Francisco J. Castander, G. R. Knapp, Gordon T. Richards, Gyula P. Szokoly, Hawkins M. R. S., Heidi Jo Newberg, István Csabai, J. Brinkmann, J. H. Crocker, James Annis, James E. Gunn, Jeffrey A. Munn, Jeffrey R. Pier, John E. Anderson, Jr., John W. Briggs, Jon Loveday, Joshua A. Frieman, Larry Carey, Mamoru Doi, Mariangela Bernardi, Mark SubbaRao, Masataka Fukugita, Matt Newcomb, Michael A. Strauss, Michael W. Richmond, Neta A. Bahcall, Patrick Waddell, R. C. Nichol, R. French  Leger, Richards G. T., Robert B. Hindsley, Robert Brunner, Robert H. Lupton, Russell Owen, Scott Burles, Scott D. Friedman, Scott F. Anderson, Stepanian J. A., Stephen Kent, Stephen Smee, Timothy A. McKay, Vanden Berk D. E., Walter A. Siegmund, Wei Zheng, Xiaohui Fan, Yehuda Snir, Željko Ivezić   +70 more
core   +1 more source

Comprehensive Connection among the Quasars with Different Types of Outflow Absorption Lines

The Astrophysical Journal
It is commonly accepted that outflows from the central regions of quasars play a substantial role in regulating the global properties of the host galaxy. These outflows are typically detected through blueshifted absorption lines.
Xing-Long Peng, Zhi-Fu Chen, Zhi-Cheng He, Ting-Ting Pang, Zhi-Wen Wang   +4 more
doaj   +1 more source

Circum-Galactic Medium in the Halo of Quasars

Frontiers in Astronomy and Space Sciences, 2017
The properties of circum-galactic gas in the halo of quasar host galaxies are investigated analyzing Mg II 2800 and C IV 1540 absorption-line systems along the line of sight close to quasars.
Riccardo Ottolina, Renato Falomo, Aldo Treves, Michela Uslenghi, Jari K. Kotilainen, Riccardo Scarpa, Emanuele Paolo Farina   +6 more
doaj   +1 more source