Results 1 to 10 of about 1,747 (185)

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

Feasibility of a field‐based submaximal stair ascent test for estimating aerobic capacity and lower‐limb strength in middle‐aged and older adults

Clinical Physiology and Functional Imaging, Volume 46, Issue 4, July 2026.
Abstract Background Assessing functional capacity is a key aspect of exercise testing and offers important insights into health in adult populations. However, accurate assessment often requires laboratory‐based maximal tests. This pilot study investigated whether a field‐based self‐paced submaximal stair ascent test could feasibly assess aerobic ...
Matti Hyvärinen, Niina Kajan, Eeva Kettunen, Ari Lehtiö, Jouni Kallio, Keegan Knittle, Neil Cronin, Laura Karavirta   +7 more
wiley   +1 more source

VODKA-JWST: Synchronized Growth of Two Supermassive Black Holes in a Massive Gas Disk? A 3.8 kpc Separation Dual Quasar at Cosmic Noon with the NIRSpec Integral Field Unit

The Astrophysical Journal
The search for dual supermassive black holes (SMBHs) is of immense interest in modern astrophysics. Galaxy mergers may fuel and produce SMBH pairs. Actively accreting SMBH pairs are observed as dual quasars, which are vital probes of SMBH growth.
Yuzo Ishikawa, Nadia L. Zakamska, Yue Shen, Xin Liu, Yu-Ching Chen, Hsiang-Chih Hwang, Andrey Vayner, David S. N. Rupke, Sylvain Veilleux, Dominika Wylezalek, Arran C. Gross, Swetha Sankar, Nadiia Diachenko   +12 more
doaj   +1 more source

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

Asian Pacific Association of Gastroenterology (APAGE) Clinical Practice Guidelines on the Use of Small Molecules and IL‐23 p19 Inhibitors in Ulcerative Colitis and Crohn's Disease

Journal of Gastroenterology and Hepatology, Volume 41, Issue 7, Page 2006-2029, July 2026.
ABSTRACT Ulcerative colitis (UC) and Crohn's disease (CD) are increasingly prevalent in the Asia Pacific region, necessitating updated, region‐specific guidance on advanced therapies. Targeted small molecule agents, such as filgotinib, tofacitinib, upadacitinib, etrasimod, and ozanimod; and the IL‐23 p19 inhibitors (guselkumab, mirikizumab ...
Choon Jin Ooi, Khoon Lin Ling, Julajak Limsrivilai, Shu‐Chen Wei, Joyce Wing Yan Mak, Taku Kobayashi, Luan Minh Dang, Rupert W. Leong, Huiyu Lin, Meng‐Tzu Weng, Wan Chee Ong, Vineet Ahuja, Satimai Aniwan, Ryota Hokari, Wei Jie Jonathan Lee, Alex Hwong‐Ruey Leow, Wai‐Keung Leung, Wee‐Chian Lim, Govind Makharia, Katsuyoshi Matsuoka, Nazri Mustaffa, Siew‐Chien Ng, Mathew Philip, Pises Pisespongsa, Raja Affendi Raja Ali, Zhi Hua Ran, Marcellus Simadibrata, Jose Sollano, Malcolm Tan, Hang Dao Viet, Nik Razima Wan Ibrahim, Kai Chun Wu, Byong Duk Ye, Ida Hilmi, Asian Pacific Association of Gastroenterology (APAGE) Inflammatory Bowel Disease Committee and Asian Education Network in IBD (AEN‐IBD)   +34 more
wiley   +1 more source

The effect of pre‐exercise hyperventilation on repeated high‐intensity inclined sprint performance

Experimental Physiology, Volume 111, Issue 7, Page 3412-3424, 1 July 2026.
Abstract High‐intensity exercise induces systemic acidosis, which contributes to muscular performance decline. Controlled pre‐exercise hyperventilation has been proposed as a non‐invasive intervention to induce respiratory alkalosis and counteract acidosis‐related acute fatigue.
Leon Fesseler, Andreas Patzak, Viktor Heinz, Ngan‐Ha Stella Le, Oliver Opatz, Niklas Pilz, Tomas Lucca Bothe   +6 more
wiley   +1 more source

The Physical Properties of Low-redshift FeLoBAL Quasars. IV. Optical–Near-IR Spectral Energy Distributions and Near-IR Variability Properties

The Astrophysical Journal
We present the optical–near-infrared spectral energy distributions (SED) and near-infrared variability properties of 30 low-redshift iron low-ionization Broad Absorption Line quasars (FeLoBALQs) and matched samples of LoBALQs and unabsorbed quasars ...
Karen M. Leighly, Hyunseop Choi, Michael Eracleous, Donald M. Terndrup, Sarah C. Gallagher, Gordon T. Richards   +5 more
doaj   +1 more source

Minimalist Footwear Acutely Alters Running Kinematics in Runners With Medial Tibial Stress Syndrome

Arthroscopy, Sports Medicine, and Rehabilitation, Volume 8, Issue 3, June 2026.
Purpose To assess immediate biomechanical changes in runners with medial tibial stress syndrome (MTSS) when transitioning from standard to minimalist running shoes. Methods Active runners diagnosed with MTSS ran on a treadmill at 10 km/h using standard and minimalist running shoes. Hip, knee, and ankle joint kinematics were captured using a 16‐infrared‐
Quyet Thang Nguyen, My T. Than, Minh Ho Ngoc, Ngoc‐Tram Nguyen, Nam Vu Tu, Tien Quang Tran, Dung Tran Trung   +6 more
wiley   +1 more source

Hidden No More: Spotlight on Tidal Disruption Events in Active Galactic Nuclei

Astronomische Nachrichten, Volume 347, Issue 5, June 2026.
ABSTRACT Tidal disruption events (TDEs) are typically discovered in previously quiescent galaxies. However, earlier studies have revealed a handful of TDEs occurring in pre‐existing active galactic nuclei (AGN). We discuss AT2019aalc, a promising TDE candidate in an AGN, and compare it to similar sources.
Patrik Milán Veres
wiley   +1 more source

Machine Learning–based Search of High-redshift Quasars

The Astrophysical Journal Supplement Series
We present a machine learning search for high-redshift (5.0 < z < 6.5) quasars using the combined photometric data from the Dark Energy Spectroscopic Instrument (DESI) Imaging Legacy Surveys and the Wide-field Infrared Survey Explorer survey.
Guangping Ye, Huanian Zhang, Qingwen Wu
doaj   +1 more source