Results 71 to 80 of about 10,836 (194)

A fourth HI 21-cm absorption system in the sight-line of MG J0414+0534: a record for intervening absorbers [PDF]

, 2013
We report the detection of a strong HI 21-cm absorption system at z=0.5344, as well as a candidate system at z=0.3389, in the sight-line towards the z=2.64 quasar MG J0414+0534.
Bignell, C., Curran, S. J., Tanna, A., Webb, J. K., Whiting, M. T.   +4 more
core   +1 more source

Listerin Alleviates Alzheimer's Disease through IRE1‐mediated Decay of TLR4 mRNA

Advanced Science, Volume 12, Issue 32, August 28, 2025.
Alzheimer's disease (AD) progression is influenced by microglia‐mediated neuroinflammation. Here, it is demonstrated that Listerin suppresses neuroinflammatory signaling and cognitive impairment in AD models by triggering IRE1α‐mediated TLR4 mRNA decay. Adenoviral Listerin delivery reduces amyloid‐β pathology, positioning it as a new therapeutic target.
Fei Qin, Runyu Cao, Xuemei Bai, Jiahua Yuan, Wanwei Sun, Yi Zheng, Xiaopeng Qi, Wei Zhao, Bingyu Liu, Chengjiang Gao   +9 more
wiley   +1 more source

Galactic-scale Emission-line Outflow from the Radio-loud Quasar 3C 191

The Astrophysical Journal Supplement Series
Quasar feedback is routinely invoked as an indispensable ingredient in galaxy formation models. Galactic outflows are a crucial agent of quasar feedback that frequently manifest themselves in absorption and emission lines.
Qinyuan Zhao, Luming Sun, Lu Shen, Guilin Liu, Junfeng Wang, Mayank Sharma, Nahum Arav, Yulong Gao, Chris Benn   +8 more
doaj   +1 more source

The COS CGM Compendium. V. The Dichotomy of O vi Associated with Low- and High-metallicity Cool Gas at z < 1

The Astrophysical Journal
We analyze the O vi content and kinematics for 126 H i -selected absorbers at 0.14 ≲ z ≲ 0.73 for which the metallicities of their cool photoionized phase have been determined. We separate the absorbers into 100 strong Ly α forest systems (SLFSs with 15 ≲
Sameer, Nicolas Lehner, J. Christopher Howk, Andrew J. Fox, John M. O’Meara, Benjamin D. Oppenheimer   +5 more
doaj   +1 more source

Deep Space Network Radio Science and Ground‐Based Planetary Radar in the Next Decade

Radio Science, Volume 60, Issue 7, July 2025.
Abstract The Deep Space Network (DSN) has been a core operational element of NASA's crewed and robotic exploration of the Solar System since the early 1960s. The primary role of the DSN has been to acquire telemetry and navigation data, but over the years, its radiometric and radar capabilities have expanded to form a system for obtaining unique ...
R. S. Park, J. E. Riedel, N. Rodriguez‐Alvarez, M. Brozovic, L. A. M. Benner, P. Vergados, D. Buccino, C. S. Jacobs, L. S. Locke, S. W. Asmar, R. Castano, T. J. W. Lazio, J. Jao, C. Lee   +13 more
wiley   +1 more source

Redshift‐Agnostic Machine Learning Classification: Unveiling Peak Performance in Galaxy, Star, and Quasar Classification (Using SDSS DR17)

Astronomische Nachrichten, Volume 346, Issue 5, June 2025.
ABSTRACT Classification of galaxies, stars, and quasars using spectral data is fundamental to astronomy, but often relies heavily on redshift. This study evaluates the performance of 10 machine learning algorithms on SDSS data to classify these objects, with a particular focus on scenarios where redshift information is unavailable.
Debashis Chatterjee, Prithwish Ghosh
wiley   +1 more source

Deep Learning Voigt Profiles. I. Single-Cloud Doublets

The Astronomical Journal
Voigt profile (VP) decomposition of quasar absorption lines is key to studying intergalactic gas and the baryon cycle governing the formation and evolution of galaxies.
Bryson Stemock, Christopher W. Churchill, Avery Lee, Sultan Hassan, Caitlin Doughty, Rogelio Ochoa   +5 more
doaj   +1 more source

Candidate Type II Quasars at 2 < z < 4.3 in the Sloan Digital Sky Survey III

, 2013
At low redshifts, dust-obscured quasars often have strong yet narrow permitted lines in the rest-frame optical and ultraviolet, excited by the central active nucleus, earning the designation Type II quasars.
Alexandroff, Rachael, Brandt, W. N., Ge, Jian, Greene, Jenny E., Hamann, Fred, Liu, Guilin, Myers, Adam D., Petitjean, Patrick, Ross, Nicholas P., Schneider, Donald P., Smith, Paul S., Strauss, Michael A., Yesuf, Hassen, York, Donald G., Zakamska, Nadia L.   +14 more
core   +2 more sources

Probing the He ii Reionization ERa via Absorbing C iv Historical Yield (HIERACHY). IV. A Complex Redshifted Absorption System Intrinsic to Quasar

The Astrophysical Journal
High-resolution spectra provide a powerful tool in studying the associated absorption lines in quasars. We present a case study of the quasar J014741-030247 at z  ∼  4.75, which hosts complex intrinsic absorption lines revealed by the high-resolution ...
Huiyang Mao, Jiang-Tao Li, Xiaodi Yu, Zhijie Qu, Weizhe Liu, Li Ji   +5 more
doaj   +1 more source

Characterization and Optimization of Vesicle Properties in bioPISA: from Size Distribution to Post‐Assembly Loading

Advanced Biology, Volume 9, Issue 5, May 2025.
The paper explores the creation and characterization of vesicles through biocatalytic Polymerization‐Induced Self‐Assembly (bioPISA), focusing on achieving size uniformity using centrifugation techniques. It examines the effects of stirring speed on vesicle morphology and analyses the internal polymer‐rich structure using fluorescence correlation ...
Andrea Belluati, Adrian Bloch, Kaloian Koynov, Mariana Müller Nieva, Mohadeseh Bagherabadi, Annette Andrieu‐Brunsen, Harald Kolmar, Nico Bruns   +7 more
wiley   +1 more source