Results 21 to 30 of about 47,912 (274)

A complete catalogue of merger fractions in AGN hosts: No evidence for an increase in detected merger fraction with AGN luminosity

The Open Journal of Astrophysics, 2023
Despite the importance of Active Galactic Nuclei (AGN) in galaxy evolution, the mechanisms that fuel AGN activity remain poorly understood. Theoretical models suggest that major mergers of galaxies contribute strongly to AGN fuelling, particularly at ...
Carolin Villforth
doaj   +1 more source

An Excess of Active Galactic Nuclei Triggered by Galaxy Mergers in MaNGA Galaxies of Stellar Mass ∼1011 M ⊙

The Astrophysical Journal
To facilitate new studies of galaxy-merger-driven fueling of active galactic nuclei (AGNs), we present a catalog of 387 AGNs that we have identified in the final population of over 10,000 z < 0.15 galaxies observed by the Sloan Digital Sky Survey-IV ...
Julia M. Comerford, Rebecca Nevin, James Negus, R. Scott Barrows, Michael Eracleous, Francisco Müller-Sánchez, Namrata Roy, Aaron Stemo, Thaisa Storchi-Bergmann, Dominika Wylezalek   +9 more
doaj   +1 more source

Galaxy and Mass Assembly (GAMA): merging galaxies and their properties [PDF]

, 2014
We derive the close pair fractions and volume merger rates for galaxies in the Galaxy and Mass Assembly (GAMA) survey with −23 < Mr < −17 (ΩM = 0.27, ΩΛ = 0.73, H0 = 100 km s−1 Mpc−1) at 0.01 < z < 0.22 (look-back time of
Aaron S. G. Robotham, Abraham, Ahn, Andrew M. Hopkins, Baldry, Baldry, Baldwin, Baugh, Bell, Bergvall, Berrier, Bessiere, Blumenthal, Boylan-Kolchin, Bridge, Bruzual, Bundy, Casteels, Cattaneo, Chou, Cisternas, Cluver, Colless, Comerford, Conselice, Cotini, Darg, Darg, De Propris, De Propris, De Propris, De Propris, de Ravel, Deng, Deng, Driver, Driver, Ellison, Ellison, Faber, Fritz, Genel, Guo, Haas, Holmberg, Hopkins, Hopkins, Huang, Ivan K. Baldry, Jian, Jiang, Jiang, Jogee, Jon Loveday, Joss Bland-Hawthorn, Kampczyk, Kartaltepe, Kauffmann, Kaviraj, Kelvin, Kitzbichler, Lee Kelvin, Li, Lin, Lin, Lin, Liske, Lopez-Sanjuan, Lopez-Sanjuan, Lopez-Sanjuan, Lotz, Lotz, Lotz, Maller, Masjedi, Masjedi, McGee, McLure, Mihos, Mo, Moore, Moreno, Murali, Norberg, Parry, Patton, Patton, Patton, Patton, Patton, Peng, Perret, Robaina, Robaina, Roberto De Propris, Robotham, Robotham, Ryan, Sarah Brough, Simon P. Driver, Skelton, Springel, Steve Phillipps, Stewart, Strateva, Taylor, Teng, Thomas, Toomre, Toomre, Toribio, Tremonti, Trinh, van den Bosch, van Dokkum, Wen, Wild, Williams, Xu, York, Zwicky, Zwicky   +121 more
core   +2 more sources

A Proof‐of‐Concept Assessment of a Novel Wearable Eyelid Muscle Device: A Pre‐Clinical Animal Cadaver Study for Eyelid Closure Restoration

Advanced Robotics Research, EarlyView.
This article introduces a soft wearable eyelid sling device incorporating a hydraulic soft artificial muscle (SAM) for achieving complete closure of an eyelid. The SAM is driven by a cam mechanism that provides a displacement profile closely matched with those of a healthy eyelid.
Patrick Pruscino, Phuoc Thien Phan, James Davies, Bibhu Sharma, Tianruo Guo, Chi Cong Nguyen, Nigel H. Lovell, Thanh Nho Do   +7 more
wiley   +1 more source

MAGICS I. The First Few Orbits Encode the Fate of Seed Massive Black Hole Pairs

The Open Journal of Astrophysics
The elusive massive black hole (MBH) seeds stand to be revealed by the Laser Space Antenna Interferometer through mergers. As an aftermath of galaxy mergers, MBH coalescence is a vastly multi-scale process connected to galaxy formation. We introduce the "
Nianyi Chen, Diptajyoti Mukherjee, Tiziana Di Matteo, Yueying Ni, Simeon Bird, Rupert Croft   +5 more
doaj   +1 more source

A Chandra X-Ray Survey of Optically Selected Close Galaxy Pairs: Unexpectedly Low Occupation of Active Galactic Nuclei

The Astrophysical Journal, 2023
High-resolution X-ray observations offer a unique tool for probing the still-elusive connection between galaxy mergers and active galactic nuclei (AGNs).
Lin He, Meicun Hou, Zhiyuan Li, Shuai Feng, Xin Liu   +4 more
doaj   +1 more source

A Cosmological Framework for the Co-Evolution of Quasars, Supermassive Black Holes, and Elliptical Galaxies: I. Galaxy Mergers & Quasar Activity

, 2007
(Abridged) We develop a model for the cosmological role of mergers in the evolution of starbursts, quasars, and spheroidal galaxies. Combining halo mass functions (MFs) with empirical halo occupation models, we calculate where major galaxy-galaxy mergers
Athanassoula E., Bower R. G., Combes F., da Angela J., Dušan Kereš, Gao L., Kormendy J., Krivitsky D. S., Lars Hernquist, Li C., Lynden-Bell D., Mo H. J., Pfenniger D., Philip F. Hopkins, Richstone D., Salviander S., Saunders W., Shakura N. I., Soltan A., Thomas J. Cox, Weinmann S. M., White S. D. M.   +21 more
core   +1 more source

Long‐Term Elevated CO2 Improves Soil Health and Rice Yields in Paddy Fields

Advanced Science, EarlyView.
Combining the two longest‐running rice free‐air CO2 enrichment experiments with a global data synthesis, this study demonstrates that long‐term elevated CO2 consistently enhances soil health. In rice paddies, this improvement sustains the CO2 fertilization effect over decades.
Fan Jiang, Wenchao Du, Kees van van Groenigen, Josep Peñuelas, Scott X. Chang, Lian Song, Chuang Cai, Yu Wang, Lin Deng, Zhengkun Hu, Weishou Shen, Qicong Wu, Haiyang Yu, Ying Yin, Fuxun Ai, Wei Zhou, Dongming Wang, Jianqiang Sun, Xiaoyuan Yan, Renfang Shen, Jiabao Zhang, Hongyan Guo, Chunwu Zhu   +22 more
wiley   +1 more source

Identifying Mergers in the Legacy Surveys with Few-shot Learning

The Astrophysical Journal Supplement Series
Galaxy mergers exert a pivotal influence on the evolutionary trajectory of galaxies and the expansive development of cosmic structures. The primary challenge encountered in machine learning–based identification of merging galaxies arises from the ...
Shoulin Wei, Xiang Song, Zhijian Zhang, Bo Liang, Wei Dai, Wei Lu, Junxi Tao   +6 more
doaj   +1 more source

Merger-Induced Metallicity Dilution in Cosmological Galaxy Formation Simulations

, 2018
Observational studies have revealed that galaxy pairs tend to have lower gas-phase metallicity than isolated galaxies. This metallicity deficiency can be caused by inflows of low-metallicity gas due to the tidal forces and gravitational torques ...
Bustamante, Sebastian, Grand, Robert J. J., Sparre, Martin, Springel, Volker   +3 more
core   +1 more source