Results 61 to 70 of about 2,437 (246)

Investigation on tunnel stability considering pipe‐roof support with transparent soil technology

Deep Underground Science and Engineering, EarlyView.
This study integrates transparent soil technology, 3D reconstruction and numerical simulation to captures the full‐field deformation of shield tunnel instability. Results demonstrate that pipe‐roof support enhances stability via the “soil‐arching barrier effect,” effectively restraining failure wedge development by extending stress transfer paths ...
Zhi Jia, Yunpeng Ji, Zhao Lu, Honghua Zhao, Limin Zhang   +4 more
wiley   +1 more source

Gas Accretion from a Neighbouring Galaxy Fuels the Low-luminosity Active Galactic Nucleus in NGC 4278

The Astrophysical Journal
How a seemingly “dead” host galaxy provides fuel for its active galactic nucleus (AGN) remains an unresolved problem. Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), we present a new high-sensitivity atomic-hydrogen (H i ...
Jin-Long Xu, Nai-Ping Yu, Ming Zhu, Chuan-Peng Zhang, Xiao-Lan Liu, Mei Ai, Peng Jiang   +6 more
doaj   +1 more source

JWST Spectroscopic View of a Rapidly Growing, Dust-obscured Quasar at z ∼ 4: Effect of Dust Extinction Correction on Black Hole Mass and Eddington Ratio Estimation

The Astrophysical Journal
In the merger-driven galaxy evolution scenario, the central supermassive black holes (SMBHs) in dust-obscured galaxies grow rapidly. Interestingly, a recent work on a dust-obscured galaxy, LID-568 at z = 3.965, has shown that its SMBH is growing ...
Dohyeong Kim, Myungshin Im
doaj   +1 more source

Spherical accretion in nearby weakly active galaxies [PDF]

Astronomy & Astrophysics, 2006
We consider the sample of weakly active galaxies situated in 'Local Universe' collected in the paper of Pellegrini (2005) with inferred accretion efficiencies from $10^{-2}$ to $10^{-7}$. We apply a model of spherically symmetrical Bondi accretion for given parameters ($M_{BH}$,$T_{\infty}$,$ρ_{\infty}$,) taken from observation.
openaire   +2 more sources

ACCRETION RATE AND THE PHYSICAL NATURE OF UNOBSCURED ACTIVE GALAXIES [PDF]

The Astrophysical Journal, 2011
We show how accretion rate governs the physical properties of a sample of unobscured broad-line, narrow-line, and lineless active galactic nuclei (AGNs). We avoid the systematic errors plaguing previous studies of AGN accretion rate by using accurate accretion luminosities (L_int) from well-sampled multiwavelength SEDs from the Cosmic Evolution Survey (
Trump, Jonathan R, Impey, Christopher D., Kelly, Brandon C., CIVANO, FRANCESCA MARIA, Gabor, Jared M., Diamond Stanic, Aleksandar M., Merloni, Andrea, Urry, C. Megan, Hao, Heng, Jahnke, Knud, Nagao, Tohru, Taniguchi, Yoshi, Koekemoer, Anton M., LANZUISI, GIORGIO, Liu, Charles, Mainieri, Vincenzo, Salvato, Mara, Scoville, Nick Z.   +17 more
openaire   +5 more sources

Progress of metabolomics‐centric multi‐omics research in medicine

iMetaOmics, EarlyView.
The graphical abstract illustrates a holistic roadmap for metabolomics‐centric multi‐omics integration in medical research. The upper panel depicts the technological transition from traditional bulk analysis to high‐resolution single‐cell and spatial methodologies, specifically addressing inherent challenges such as molecular complexity and dynamic ...
Ziyi Wang, Shiwen Deng, Xiaoxu Wang, Xiao Chang, Na Guo, Peng Chen, Hongjun Yang   +6 more
wiley   +1 more source

Properties of Galaxies with Counter-rotating Stellar Disks in the MaNGA Survey

The Astrophysical Journal
The gas accretion process can fuel both star formation and black hole activity, playing a critical role in galaxy evolution. The counter-rotating structures are believed to originate from gas accretion, serving as an ideal laboratory to study its impact ...
Min Bao, Zhenyu Tang, Yanmei Chen, Yong Shi, Qiusheng Gu   +4 more
doaj   +1 more source

The Physics of Galaxy Accretion

How do galaxies get the gas needed to fuel star formation?' remains a fundamental open question, even for the Milky-Way. I will review recent theoretical developments in galaxy accretion physics, which go beyond the classic separation between 'cold' and 'hot' accretion. I will also discuss the potential implications of different accretion modes for the
Stern, Jonathan, Kakoly, Aharon, Goldner, Roy, Hafen, Z., Faucher-Giguère, C.-A., Fielding, D., Quataert, E., Bullock, J., FIRE collaboration   +8 more
openaire   +1 more source

Diving Deeper Into Mechanisms of Acrylamide‐Induced Toxicity: RNA Sequencing Reveals Transcriptomic Alteration and Retrotransposon Expression in Drosophila melanogaster

Environmental Toxicology, EarlyView.
ABSTRACT Given the inevitability of human and animal exposure to acrylamide, there is increasing concern regarding its potential health risks. While a number of molecular mechanisms have been proposed, the complexity of acrylamide toxicological pathways and interactions remains incompletely characterized.
Oluwabukola Mary Farodoye, Titilayomi Ayomide Otenaike, Daniela Moreira Mombach, Monica Medeiros Silva, Amos Olalekan Abolaji, Elgion Lucio Da Silva Loreto   +5 more
wiley   +1 more source

Diverse Pathways for Supermassive Black Hole–Galaxy Coevolution

The Astrophysical Journal
Supermassive black holes (SMBHs) are observed in diverse galaxy populations across cosmic time, yet a clear understanding of how they coevolve with their hosts has not been reached.
Bryan A. Terrazas, James Aird, Alison L. Coil   +2 more
doaj   +1 more source