Results 41 to 50 of about 1,770 (180)

Circum-Galactic Medium in the Halo of Quasars

Frontiers in Astronomy and Space Sciences, 2017
The properties of circum-galactic gas in the halo of quasar host galaxies are investigated analyzing Mg II 2800 and C IV 1540 absorption-line systems along the line of sight close to quasars.
Riccardo Ottolina, Renato Falomo, Aldo Treves, Michela Uslenghi, Jari K. Kotilainen, Riccardo Scarpa, Emanuele Paolo Farina   +6 more
doaj   +1 more source

The Circumgalactic Medium of Quasars [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractI will argue that observations of the diffuse gas in the outskirts of quasar host galaxies, or the so called circumgalactic medium, are essential for understanding how luminous quasars evolve in a cosmological context. Such observations also provide a fruitful comparison to theory, because hydrodynamics at moderate overdensities is much easier ...
openaire   +1 more source

Formation of multiphase plasma in galactic haloes and an analogy to solar plasma

Frontiers in Astronomy and Space Sciences, 2023
Thermal instability (TI) potentially explains the origin of cold gas in the intracluster medium (ICM), which is heated sufficiently by AGN feedback. The Hα filaments seen in cluster cores provide strong motivation for TI.
Prakriti Pal Choudhury
doaj   +1 more source

The Mitchell Spectrograph: Studying Nearby Galaxies with the VIRUS Prototype

Advances in Astronomy, Volume 2013, Issue 1, 2013., 2013
The Mitchell Spectrograph (a.k.a. VIRUS‐P) on the 2.7 m Harlan J. Smith telescope at McDonald Observatory is currently the largest field of view (FOV) integral field unit (IFU) spectrograph in the world (1.7′ × 1.7′). It was designed as a prototype for the highly replicable VIRUS spectrograph which consists of a mosaic of IFUs spread over a 16 ...
Guillermo A. Blanc, Jorge Iglesias Páramo   +1 more
wiley   +1 more source

MUSE-ALMA Halos XI: Gas flows in the circumgalactic medium

, 2023
The flow of gas into and out of galaxies leaves traces in the circumgalactic medium which can then be studied using absorption lines towards background quasars. We analyse 27 log(N_HI) > 18.0 HI absorbers at z = 0.2 to 1.4 from the MUSE-ALMA Halos survey
Glenn G Kacprzak, Fox, Andrew J., Szakacs, Roland, Nelson, D., Hayes, Matthew J.,, Weng, S., Hayes, M., Simon Weng, Kacprzak, Glenn G., Bollo, V., Karki, A., Dylan Nelson, Karki, Arjun, Arjun Karki, Martin Zwaan, Hamanowicz, Aleksandra, Kulkarni, V., Ramona Augustin, Zwaan, Martin, Matthew J Hayes, Péroux, C., Casavecchia, B., Szakacs, R., Kacprzak, G., Casavecchia, Benedetta, Benedetta Casavecchia, Hamanowicz, A., Hayes, Matthew J., Varsha P Kulkarni, Andrew J Fox, Augustin, R., Zwaan, M., Péroux, Céline, Roland Szakacs, Sadler, E., Victoria Bollo, Kulkarni, Varsha P., Bollo, Victoria, Aleksandra Hamanowicz, Augustin, Ramona, Weng, Simon, Céline Péroux, Sadler, Elaine M., Elaine M Sadler, Fox, A., Nelson, Dylan   +45 more
core   +1 more source

Cosmic Ray Processes in Galactic Ecosystems

Galaxies, 2023
Galaxy evolution is an important topic, and our physical understanding must be complete to establish a correct picture. This includes a thorough treatment of feedback.
Ellis R. Owen, Kinwah Wu, Yoshiyuki Inoue, H.-Y. Karen Yang, Alison M. W. Mitchell   +4 more
doaj   +1 more source

MUSE-ALMA Haloes XI: gas flows in the circumgalactic medium

, 2023
The flow of gas into and out of galaxies leaves traces in the circumgalactic medium which can then be studied using absorption lines towards background quasars.
Simon Weng (19103831), Elaine M. Sadler (19018193), Aleksandra Hamanowicz (19103846), Victoria Bollo (19103834), Céline Péroux (19020200), Glenn Kacprzak (18924052), Arjun Karki (3472460), Matthew J. Hayes (7201070), Andrew J. Fox (5366662), Roland Szakacs (19103840), Dylan Nelson (12083210), Martin Zwaan (19000325), Benedetta Casavecchia (19103837), Varsha P. Kulkarni (19103843), Ramona Augustin (19074947)   +14 more
core   +1 more source

HUBS: a dedicated hot circumgalactic medium explorer [PDF]

Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, 2020
The Hot Universe Baryon Surveyor (HUBS) mission is proposed to study "missing" baryons in the universe. Unlike dark matter, baryonic matter is made of elements in the periodic table, and can be directly observed through the electromagnetic signals that it produces.
Wei Cui, Joel Bregman, Marcel Bruijin, Liubiao Chen, Yang Chen, Chen Cui, Taotao Fang, Bo Gao, He Gao, Jian-Rong Gao, Luciano Gottardi, Kaixuan Gu, Fulai Guo, Jia Guo, Chunling He, Pengfei He, Jan-Willem A. den Herder, Qiushi Huang, Fajun Li, Jiangtao Li, Jinjin Li, Lingyun Li, Tipei Li, Wenbing Li, Jingtao Liang, Yajie Liang, Guiyun Liang, Yanjie Liu, Zhi Liu, Ziyao Liu, Felix Jaeckel, Li Ji, Wei Ji, Hai Jin, Xi Kang, Yuexue Ma, Dan McCammon, Houjun Mo, Kenichiro Nagayoshi, Kari Nelms, Ruizhe Qi, Jia Quan, Marcel Ridder, Zhengxiang Shen, Aurora Simionescu, Emanuele Taralli, Daniel Wang, Guole Wang, Junjie Wang, Kun Wang, Le Wang, Sifan Wang, Shijian Wang, Tinggui Wang, Wei Wang, Xiaoqiang Wang, Yongliang Wang, Yeru Wang, Zhen Wang, Zhanshan Wang, Ningyuan Wen, Martin de Wit, Shufan Wu, Da Xu, Dandan Xu, Haiguang Xu, Xiaojie Xu, Renxin Xu, Yongquan Xue, Shengzhen Yi, Jun Yu, Luwei Yang, Feng Yuan, Shuo Zhang, Wei Zhang, Zhong Zhang, Qing Zhong, Yu Zhou, Wenxiu Zhu   +78 more
openaire   +2 more sources

A disk-dominated and clumpy circumgalactic medium of the Milky Way seen in X-ray emission

, 2020
International audienceThe Milky Way galaxy is surrounded by a circumgalactic medium that may play a key role in galaxy evolution as the source of gas for star formation and a repository of metals and energy produced by star formation and nuclear activity.
Kaaret, Philip, Bluem, J., Zajczyk, A., Jahoda, K., Gulick, H., Larocca, D. M., Koutroumpa, Dimitra, Ringuette, R., Kuntz, K. D., Hodges-Kluck, E.   +9 more
core   +1 more source

Interpreting Observations of Absorption Lines in the Circumgalactic Medium with a Turbulent Medium [PDF]

The Astrophysical Journal, 2020
Abstract Single-phase photoionization equilibrium (PIE) models are often used to infer the underlying physical properties of galaxy halos probed in absorption with ions at different ionization potentials. To incorporate the effects of turbulence, we use the Models of Agitated and Illuminated Hindering and Emitting Media (MAIHEM) code to ...
Edward Buie, Michele Fumagalli, Evan Scannapieco   +2 more
openaire   +5 more sources