Results 41 to 50 of about 382 (184)

The Discovery of a Luminous Broad Absorption Line Quasar at a Redshift of 7.02 [PDF]

The Astrophysical Journal Letters, 2018
Abstract Despite extensive efforts, to date only two quasars have been found at z > 7, due to a combination of low spatial density and high contamination from more ubiquitous Galactic cool dwarfs in quasar selection. This limits our current knowledge of the super-massive black hole growth mechanism and reionization history.
Feige Wang, Jinyi Yang, Xiaohui Fan, Minghao Yue, Xue-Bing Wu, Jan-Torge Schindler, Fuyan Bian, Jiang-Tao Li, Emanuele P. Farina, Eduardo Bañados, Frederick B. Davies, Roberto Decarli, Richard Green, Linhua Jiang, Joseph F. Hennawi, Yun-Hsin Huang, Chiara Mazzucchelli, Ian D. McGreer, Bram Venemans, Fabian Walter, Yuri Beletsky   +20 more
openaire   +4 more sources

Coordinated Velocity Shift of Multiple C iv and Si iv Broad Absorption Lines in Quasar SDSS J113048.45+225206.6

The Astrophysical Journal
We present an analysis of the coordinated velocity shifts observed in multiple C iv and Si iv broad absorption lines (BALs) in the quasar SDSS J113048.45+225206.6.
Wei-Jian Lu, Ying-Ru Lin
doaj   +1 more source

Material Strategies for Stimulation and Recording in Neural Biocomputing Platforms

Advanced Electronic Materials, Volume 12, Issue 14, 20 July 2026.
Material strategies enabling stimulation and recording are central to neural biocomputing systems. This review examines how electronic materials govern the encoding of inputs and decoding of outputs in living neural networks. Advances in electrical, optical, and multimodal interfaces highlight emerging design principles for biocomputing platforms ...
Sehong Kang, Junggeon Park, Aryaman Joshi, Rakid Haque, Gyu Weon Hwang, Hyunjoon Kong   +5 more
wiley   +1 more source

Quasar Broad Absorption Line Variability on Multiyear Timescales [PDF]

The Astrophysical Journal, 2008
To be published in ...
Gibson, Robert R., Brandt, W. N., Schneider, Donald P., Gallagher, S. C.   +3 more
openaire   +2 more sources

Acceleration of C iv and Si iv Broad Absorption Lines in Quasar SDSS J140058.79+260619.4

The Astronomical Journal
We report the discovery of a velocity shift signature in the C iv and Si iv broad absorption lines (BALs) of the quasar SDSS J140058.79+260619.4 ( z _em  = 2.351). From its two-epoch spectra, we find two BAL systems (systems A and B) in C iv and/or Si iv
Ying-Ru Lin, Wei-Jian Lu
doaj   +1 more source

Feasibility Study for Application of Digitized Henize Mt. Wilson Michigan Southern Sky Hα$$ \boldsymbol{\alpha} $$ Survey Low‐Dispersive Spectral Plates for Searches for Anomalous and Highly Redshifted Objects

Astronomische Nachrichten, Volume 347, Issue 6, July 2026.
ABSTRACT The goal of this study is to confirm the feasibility of the use of digitized low dispersive MtWilson Michigan Southern Sky Hα$$ \alpha $$ survey astronomical photographic plates for modern astrophysical research. The detection of highly redshifted objects, such as early galaxies and quasars, is fundamental to understanding the universe's ...
Tauseef Ahmad Zafar, René Hudec, Marta Mara Merono Vidagany, Fehmi Mejri   +3 more
wiley   +1 more source

FR II Broad Absorption Line Quasars and the Life Cycle of Quasars [PDF]

The Astrophysical Journal, 2006
By combining the Sloan Digitized Sky Survey Third Data Release quasar list with the VLA FIRST survey, we have identified five objects having both broad absorption lines in their optical spectra and FR-II radio morphologies. We identify an additional example of this class from the FIRST Bright Quasar Survey, J1408+3054.
Gregg, M D, Becker, R H, de Vries, W
openaire   +1 more source

Reacceleration of a C iv Broad Absorption Line in Quasar SDSS J083817.00+295526.5

The Astrophysical Journal
We present a rare signature of reacceleration in a C iv broad absorption line (BAL) of the quasar SDSS J083817.00+295526.5. This quasar showcases three distinct BAL systems, labeled as systems A, B, and C.
Ying-Ru Lin, Wei-Jian Lu
doaj   +1 more source

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

Using the Properties of Broad Absorption Line Quasars to Illuminate Quasar Structure [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
A key to understanding quasar unification paradigms is the emission properties of broad absorption line quasars (BALQs). The fact that only a small fraction of quasar spectra exhibit deep absorption troughs blueward of the broad permitted emission lines provides a crucial clue to the structure of quasar emitting regions. To learn whether it is possible
Yong, Suk Yee, King, Anthea L., Webster, Rachel L., Bate, Nicholas F., O'Dowd, Matthew J., Labrie, Kathleen   +5 more
openaire   +2 more sources