[AGORA-mailing-list] Santi's talks on AGORA Paper III (June 28, Mon)

[Ji-hoon Kim]

Dear AGORA Colleagues,

As announced earlier, Santi Roca-Fabrega is having two live public talks on Zoom on June 28 (Mon) to introduce the AGORA Paper III (https://arxiv.org/abs/2106.09738 <https://arxiv.org/abs/2106.09738>) and discuss the Collaboration’s immediate future plans.  

● 1st talk for Europeans/Asians/Oceanians: 
 IPARCOS seminar at Universidad Complutense de Madrid  
- June 28, 10:00 CEST, 17:00 JST/KST  
- Zoom link: https://rediris.zoom.us/j/88449204160?pwd=RmthcC91SHR0S0tHK1daTzNRR1Brdz09 <https://rediris.zoom.us/j/88449204160?pwd=RmthcC91SHR0S0tHK1daTzNRR1Brdz09>

● 2nd talk for Americans/Europeans: 
 IA-UNAM colloquium at Universidad Nacional Autonoma de Mexico  
- June 28, 13:00 PDT, 15:00 Mexico CDT, 16:00 EDT, 22:00 CEST 
- Zoom link: https://unam.zoom.us/j/89391087960?pwd=T1JiSFNWbGZ6bzNpY1lMU05FRklNZz09 <https://unam.zoom.us/j/89391087960?pwd=T1JiSFNWbGZ6bzNpY1lMU05FRklNZz09>

Note that the host of the 2nd talk has changed from UCSC to IA-UNAM.  Joel plan to host a 3rd talk at UCSC in a few weeks.  

● 3rd talk for Americans/Europeans: 
 CGI seminar at University of California at Santa Cruz  
- July 12, 13:00 PDT, 16:00 EDT, 22:00 CEST [to be confirmed]  

The title and abstract of the talk are attached below.  Please feel free to forward this message to anyone potentially interested.  All of these institutions have kindly agreed to circulating the Zoom links to a larger astrophysics community, but a waiting room will be set up as a minimal entry barrier.  The video of his talk will also be posted on the AGORA Project website (www.agorasimulations.org <http://www.agorasimulations.org/>).  

Thank you very much!

Sincerely,
Ji-hoon




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SPEAKER: 
Dr. Santi Roca Fabrega (Universidad Complutense de Madrid)

TITLE: 
New Results from the AGORA Project. III: Calibration and Comparison of Cosmological Zoom-in Simulations using Seven Different Numerical Codes

ABSTRACT: 
In this talk, we will present the latest results from the AGORA collaboration. In this new work, which is the result of four years of research, we present a suite of high-resolution cosmological zoom-in simulations to z=4 of a MW-mass halo obtained using seven contemporary astrophysical simulation codes widely used in the numerical galaxy formation community. As a first result, we introduce a series of four calibration steps each of which is designed to reduce the number of tunable simulation parameters adopted in the final cosmological run. These steps can now be used by non-participating code groups to obtain equivalent models and to join the many follow-up projects we started. After completing these calibration steps, we reach a suite of cosmological simulations with similar mass assembly histories down to z=4. We show that with numerical accuracy that resolves the internal structure of a target halo, the codes overall agree well with one another, although showing differences in the most SNe feedback-dependent parameters. We argue that, if adequately tested following our proposed calibration steps and common parameters, code groups around the world can use this new suite of high-resolution cosmological zoom-in simulations to test and validate their codes and sub-grid physics. Models obtained by the new code groups will be added to the suite and will enrich future comparison projects. 
Currently, the seven code groups are running their models down to z=2, and below, and they are saving a large number of snapshots. This large amount of data will allow us to continue with the ongoing science-oriented projects. We will show the first results obtained of two of these new projects. In the next months, we will make data from each of the calibration steps, and the final run down to z=4, publicly available. We encourage new code groups to use this data and join the collaboration by adopting the common initial conditions, the common easy-to-implement physics package, and the proposed calibration steps. We can provide them with early access to the data, and with technical support. We will end this talk by announcing the dates of the next AGORA workshop and presenting the new AGORA project webpage (www.agorasimulations.org <http://www.agorasimulations.org/>).
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Ji-hoon Kim
Assistant Professor
Dept. of Physics and Astronomy, Seoul National University
www.jihoonkim.org <http://www.jihoonkim.org/> / me at jihoonkim.org <mailto:me at jihoonkim.org> 
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