Welcome to the homepage of the Black Hole Feedback and Cosmic Ray Astrophysics group, an independent research group in Astrophysics Division of Shanghai Astronomical Observatory led by Prof. Fulai Guo. Our group works on theoretical astrophysics, with a focus on numerical simulations. Our research interests cover a broad variety of topics in contemporary astrophysics, including but not limited to

• Radio-mode AGN feedback in galaxy groups and clusters
• The Fermi Bubbles in the Milky Way
• Cosmic-ray astrophysics: acceleration, transport, emissions, dynamical roles
• Cosmic-ray driven galactic winds
• AGN feedback and galaxy quenching
• Satellite quenching in the Local Group and in general
• The circumgalactic medium
• Dark matter simulations and indirect signatures

One important topic that we are currently working on is to study the physical mechanism of black hole feedback and its roles in the evolution of galaxies, galaxy groups and clusters. Which black hole accretion and feedback modes are important in galaxy evolution? Whether, when, and how do massive black holes and galaxies co-evolve? How do black holes transfer energy to the interstellar and intracluster media? One important feature of our research is to explore the dynamical roles and observational signatures of cosmic rays in black hole feedback and galactic winds.

PUBLICATIONS AFTER 2015

1. Probing the Physics of Mechanical AGN Feedback with Radial Elongations of X-ray Cavities
   Guo, Fulai*, 2020, submitted to ApJ
2. The Milky Way Mass Constrained by Its Hot Gaseous Halo
   Guo, Fulai*; Zhang, Ruiyu; Fang, Xiang-Er, 2020, submitted
3. On the Energy Coupling Efficiency of AGN Outbursts in Galaxy Clusters
   Duan, Xiaodong; Guo, Fulai*, 2020, ApJ, 896, 114
4. Simulating the Fermi Bubbles as Forward Shocks driven by AGN Jets
   Zhang, Ruiyu; Guo, Fulai*, 2020, ApJ, 894, 117
5. On the Cooling Flow Problem in the Gaseous Halo of the Milky Way
   Fang, Xiang-Er; Guo, Fulai*; Yuan, Ye-Fei, 2020, ApJ, 894, 1
6. Numerical study of active galactic nucleus feedback in an elliptical galaxy with MACER
   Yuan, Feng; Ostriker, Jeremiah P.; Yoon, DooSoo; Li, Ya-Ping; Ciotti, Luca; Gan, Zhao-Ming; Ho, Luis C.; Guo, Fulai, 2020, IAUS, 342, 101-107
7. HUBS: Hot Universe Baryon Surveyor
   Cui, W.; Chen, L. -B.; Gao, B.; Guo, F. -L., et al. 2020, Journal of Low Temperature Physics, 199, 502-509
8. On the Efficiency of Thermal Conduction in Galaxy Clusters
   Fang, X., Guo, F.*, Yuan, Y., Mou, G., 2018, ApJ, 863, 177
9. Metal-rich Trailing Outflows Uplifted by AGN Bubbles in Galaxy Clusters
   Duan, X., Guo, F.*, 2018, ApJ, 861, 106
10. Active Galactic Nucleus Feedback in an Elliptical Galaxy with the Most Updated AGN Physics. I. Low Angular Momentum Case
    Yuan, F., Yoon, D., Li, Y., Gan, Z., Ho, L., Guo, F., 2018, ApJ, 857, 121
11. Reversing cooling flows with AGN jets: shock waves, rarefaction waves and trailing outflows
    Guo, F.*, Duan, X., Yuan, Y-F, 2018, MNRAS, 473, 1332
12. Hot accretion flow with anisotropic viscosity
    Wu, M.; Bu, D.; Gan, Z-M; Yuan, Y-F, 2017, A&A, 608, A114
13. The Peculiar Filamentary HI Structure of NGC 6145
    Wang, Enci; Wang, Jing; Kong, Xu; Guo, Fulai; Lin, Lin; Mou, Guobin; Li, Cheng; Xiao, Ting, 2017, AJ, 154, 70
14. The AGN Jet Model of the Fermi Bubbles
    Guo, F.*, 2017, Proceedings of the International Astronomical Union, 11, S322, 189-192
15. Numerical Simulations of Active Galactic Nucleus Feedback
    Guo, F.*, & Yuan, F., 2016, a review published in Progress in Astronomy (in Chinese characters), 34, 505-521
16. On the Importance of Very-light Internally-subsonic AGN Jets in Radio-mode AGN Feedback
    Guo, F.*, 2016, ApJ, 826, 17

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PUBLICATIONS BEFORE 2015

17. The Shape of X-Ray Cavities in Galaxy Clusters: Probing Jet Properties and Viscosity
    Guo, F., 2015, ApJ, 803, 48, 12 pp
18. Connecting Star Formation Quenching with Galaxy Structure and Supermassive Black Holes through Gravitational Heating of Cooling Flows
    Guo, F., 2014, ApJ, 797, L34
19. Hot versus Cold: the Dichotomy in Spherical Accretion of Cooling Flows onto Supermassive Black Holes in Elliptical Galaxies, Galaxy Groups, and Clusters
    Guo, F., & Mathews, W. G., 2014, ApJ, 780, 126, 17 pp
20. Cosmic ray streaming in clusters of galaxies
    Wiener, Joshua; Oh, S. Peng; Guo, Fulai, 2013, MNRAS, 434, 2209
21. The Fermi Bubbles. II. The Potential Roles of Viscosity and Cosmic-Ray Diffusion in Jet Models
    Guo, F., Mathews, W. G., Dobler, G., Oh, S. P., 2012, ApJ, 756, 182
22. The Fermi Bubbles. I. Possible Evidence for Recent AGN Jet Activity in the Galaxy Highlighted
    Guo, F., & Mathews, W. G., 2012, ApJ, 756, 181, 17 pp
23. Dynamics inside the radio and X-ray cluster cavities of Cygnus A and similar FRII sources
    Mathews, W. G., & Guo, F., 2012, ApJ, 755, 13, 15 pp
24. Radiating Bondi and Cooling Site Flows
    Mathews, W. G., & Guo, F., 2012, ApJ, 754, 154
25. Estimate of the Total Mechanical Feedback Energy from Galaxy Cluster-centered Black Holes:
    Implications for Black Hole Evolution, Cluster Gas Fraction and Entropy
    Mathews, W. G., & Guo, F., 2011, ApJ, 738, 155
26. Cosmic Ray Diffusion Fronts in the Virgo Cluster
    Mathews, W. G., & Guo, F., 2011, ApJ, 736, 6
27. Cosmic-ray-dominated AGN Jets and the Formation of X-ray Cavities in Galaxy Clusters
    Guo, F., & Mathews, W. G., 2011, ApJ, 728, 121
28. Self-consistent Evolution of Gas and Cosmic Rays in Cygnus A and Similar FR II Classic Double Radio Sources
    Mathews, W. G., & Guo, F., 2010, ApJ, 725, 1440
29. Removing Cool Cores and Central Metallicity Peaks in Galaxy Clusters with Powerful Active Galactic Nucleus Outbursts
    Guo, F., & Mathews, W. G., 2010, ApJ, 717, 937
30. Simulating X-ray Supercavities and Their Impact on Galaxy Clusters
    Guo, F., & Mathews, W. G., 2010, ApJ, 712, 1311
31. AGN Feedback and Bimodality in Cluster Core Entropy
    Guo, F., Oh, S. P., & Ruszkowski, M., 2009, AIP conference proceedings, Vol. 1201, 330
32. Could AGN Outbursts Transform Cool Core Clusters?
    Guo, F., & Oh, S. P., 2009, MNRAS, 400, 1992
33. A Global Stability Analysis of Clusters of Galaxies with Conduction and AGN Feedback Heating
    Guo, F., Oh, S. P., & Ruszkowski, M., 2008, ApJ, 688, 859
34. Feedback Heating by Cosmic Rays in Clusters of Galaxies Highlighted
    Guo, F., & Oh, S. P., 2008, MNRAS, 384, 251

Applications are invited for both graduate student and postdoc positions in our group. Both Chinese and international applicants are welcome.

Graduated Student Positions

If you are interested in pursuing either Master or Ph.D. degree in our group, please feel free to contact Prof. Guo for more details. Standard financial support in various forms is available. Shanghai Astronomical Observatory usually provides strongly subsidized dormitory housing for graduate students.

本课题组有一些很适合硕士和博士阶段的课题。非常欢迎感兴趣的同学申请加入、保研、或报考我们课题组。我们同时也支持一部分大学生到我们课题组做一些短期项目，包括研究实习与毕业论文。可以随时通过Email联系咨询我们。

Postdoctoral Positions (2017-2018)

Shanghai Astronomical Observatory (SHAO) invites applications for a postdoctoral position in the Black Hole Feedback and Cosmic Ray Astrophysics research group. Applicants should have a good background in theoretical astrophysics, and prior experience in computational simulations is desired. Priority will be given to candidates with an interest in any of the following areas: AGN feedback, galaxy evolution, galactic winds, cosmic ray astrophysics, the circumgalactic medium. Both Chinese and international applicants are encouraged to apply.

The appointment is awarded for two years initially, extendable for up to four years depending on performance and funding availability. The starting date is flexible. The salary is dependent on qualification and experience, and will be highly competitive. Successful candidates have direct access to computer clusters at SHAO (with nearly 3000 cores), and will also be supported to apply for various postdoc fellowships and grants funded by Chinese funding agencies. The position comes with research funds for publications, travel, etc. SHAO provides significantly subsidized dormitory housing on site.

SHAO belongs to the Chinese Academy of Sciences, which provides a diverse setting and research facilities. SHAO has good computer facilities, ample research funds, and an active visitor program. The Astrophysics Division of SHAO has about 40 faculty members, 20 postdocs, and 40 PhD students. SHAO members are actively involved in many important international and domestic projects such as SKA, SDSS-IV, LSST, LAMOST, HXMT, and FAST. More information can be found at http://astro-en.shao.cas.cn.

SHAO is located in downtown Shanghai, one of the most rapidly evolving and cosmopolitan cities in Asia. There are a very large population of international expats living in Shanghai. For an introductory guidance of working at SHAO as an expat, please see this webpage.

Applicants should submit curriculum vitae, publication list, a brief research statement, and arrange for three (or two) reference letters to be sent to fulai@shao.ac.cn by email. Inquiries for the job details are also welcome. Applications will be considered until the position is filled.