Results 61 to 70 of about 76,004 (221)

Turbulence and Star Formation Suppression in Elliptical Galaxies: The Role of Active Galactic Nucleus Jet–Wind Interaction

The Astrophysical Journal
Winds and jets are symbiotic when the accretion rate is low, according to black hole accretion theory. Both components are potentially important for active galactic nucleus (AGN) feedback, but previous works typically include only jets with free ...
Minhang Guo, Suoqing Ji, Feng Yuan, Bocheng Zhu   +3 more
doaj   +1 more source

Radio Nuclei in Nearby Galaxies [PDF]

Symposium - International Astronomical Union, 1984
This review is an attempt to summarize VLBI continuum observations at cm- and dm-wavelengths of active galactic nuclei at distances ≲ 100 Mpc (Ho = 50 km s−1 Mpc−1). ‘Nearby galaxies’, thus defined, are close enough for achieving the highest possible spatial resolution.
openaire   +1 more source

Contribution of stripped nuclear clusters to globular cluster and ultra-compact dwarf galaxy populations

, 2014
We use the Millennium II cosmological simulation combined with the semi-analytic galaxy formation model of Guo et al. (2011) to predict the contribution of galactic nuclei formed by the tidal stripping of nucleated dwarf galaxies to globular cluster (GC)
Baumgardt, Holger, Griffen, Brendan F., Hilker, Michael, Pfeffer, Joel   +3 more
core   +1 more source

Cosmic Ray Production of $^6$Li by Structure Formation Shocks in the Early Galaxy [PDF]

, 2002
We discuss the production of the element $^6$Li in the early Galaxy by cosmic rays accelerated at structure formation shocks, driven by the hierarchical merging of sub-Galactic halos during Galaxy formation.
Bekki, Boesgaard, Chiba, Fields, Hobbs, Jedamzik, Nissen, Nissen, Ramaty, Ramaty, Smith, Susumu Inoue, Suzuki, Suzuki, Takeru Ken Suzuki, Vangioni-Flam, Vangioni-Flam   +16 more
core   +2 more sources

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

Astronomische Nachrichten, EarlyView.
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

Further Evidence for a Direct-collapse Origin of the Supermassive Black Hole at the Center of the ∞ Galaxy

The Astrophysical Journal Letters
The z = 1.14 ∞ galaxy consists of two ringed nuclei with an active supermassive black hole (SMBH) in between them. The system is likely the result of a nearly face-on collision between two disk galaxies with massive bulges. In P. van Dokkum et al.
Pieter van Dokkum, Gabriel Brammer, Connor Jennings, Imad Pasha, Josephine F. W. Baggen   +4 more
doaj   +1 more source

Arbuscular mycorrhizal fungal community abundance, functions, and symbiotic interactions revealed by root metatranscriptomes

iMetaOmics, EarlyView.
Paradigm shift: PCR‐free methods reveal 6–15‐fold higher arbuscular mycorrhizal (AM) fungal abundance than metabarcoding, exposing systematic underestimation across decades of research. Predictive power: AM fungal abundance serves as a community‐level trait that predicts crop yield under drought conditions.
Peilin Chen, John W. Taylor, Cheng Gao
wiley   +1 more source

Different Origins of Nucleated and Nonnucleated Dwarf Elliptical Galaxies: Identified by Deep Learning

The Astrophysical Journal
Dwarf elliptical galaxies (dEs) are the dominant population in galaxy clusters and serve as ideal probes for studying the environmental impact on galactic evolution.
Sanjaya Paudel, Cristiano G. Sabiu, Suk-Jin Yoon, Daya Nidhi Chhatkuli, Woong-Bae G. Zee, Jaewon Yoo, Binod Adhikari   +6 more
doaj   +1 more source

In The Neighbourhood of Tame Monsters: A study of galaxies near low-redshift quasars

, 2012
The impact of quasars on their galaxy neighbours is an important factor in the understanding of galaxy evolution models. The aim of this work is to characterize the intermediate-scale environments of quasars at low redshift (z $
Abazajian, Aihara, Almeida, Arnol, B. Villarroel, Babul, Baldwin, Barnes, Barnes, Bergvall, Bergvall, Boroson, Brinchmann, Bushouse, Canalizo, Canalizo, Charlot, Cho, Coldwell, Connolly, Donzelli, Efron, Ellison, Gehren, Grcevich, Gunn, Hao, Hopkins, Hopkins, Hutchings, Kauffmann, Kennefick, Kennicutt, Kewley, Kewley, Lamastra, Li, Lietzen, Lintott, Lintott, Lintott, Liu, Lynden-Bell, Martig, Moustakas, Nikolic, Park, Petrosian, Press, Raimann, Raymond, Rees, Reyes, Rogers, Scannapieco, Schmidt, Schneider, Schneider, Schneider, Searle, Serber, Shen, Shields, Sijacki, Silk, Stoughton, Strand, Strateva, Strauss, Sutherland, Tabor, Toomre, Way, Way, Whitford, Yee, Yin, York   +77 more
core   +1 more source

Ginseng polysaccharides prevent mastitis through Lactobacillus murinus‐derived deoxycholic acid and TGR5 signaling

iMetaOmics, EarlyView.
Prebiotic Ginseng polysaccharides (GP) alleviate mastitis through selective enrichment of gut L. murinus, which elevates its anti‐inflammatory metabolite deoxycholic acid (DCA). Circulating DCA engages mammary epithelial TGR5 receptors, triggering the cAMP–PKA pathway to suppress NF‐κB/NLRP3‐mediated inflammation.
Zhijie Zheng, Huiying Liu, Sizhe Chen, Jianhui Gu, Sisi Cai, Xiang Liu, Raphaela I. Lau, Yao Zhang, Sunjae Lee, Xiaoyan Wang, Kewei Fan, Xiaole Yin, Hein Min Tun, Renyou Gan, Haichong Wu, Qi Su   +15 more
wiley   +1 more source