[Physics-grads-open] Physics & Astronomy Student Seminar (PASS), 1/20 (Fri) at 4 pm: Yash Aggarwal, Nebula Room (Physics 3027)

[Ming-Feng Ho]

Happening in 5 mins:
1. In-person: Physics 3027
2. Virtual: Zoom link below
https://ucr.zoom.us/j/95117955855?pwd=N2pReHNzeTBMbzJmWTM1QUs2akpMQT09
ID：951 1795 5855
Password：1216

On Fri, Jan 20, 2023 at 3:25 PM Ming-Feng Ho <mingfeng.ho at email.ucr.edu>
wrote:

> Upon the request by Yash, we will make the talk hybrid.
>
> 1. In-person: Physics 3027
> 2. Virtual: Zoom link below
>
> Subject：PASS - Yash Aggarwal
> Time：2023/1/20 04:00 pm PST
>
> Join zoom ~~
> https://ucr.zoom.us/j/95117955855?pwd=N2pReHNzeTBMbzJmWTM1QUs2akpMQT09
>
> ID：951 1795 5855
> Password：1216
>
> Ming-Feng
>
>
>
> On Fri, Jan 20, 2023 at 3:10 PM Ming-Feng Ho <mingfeng.ho at email.ucr.edu>
> wrote:
>
>> Yash's talk will happen in ~50 mins (4 pm in Physics 3027)!
>>
>> Ming-Feng
>>
>>
>> On Wed, Jan 18, 2023 at 5:08 PM Ming-Feng Ho <mingfeng.ho at email.ucr.edu>
>> wrote:
>>
>>> Hi Physics and Astronomy Grads,
>>>
>>> We are happy to announce resuming the Physics & Astronomy Student
>>> Seminar (PASS website
>>> <https://jibancat.github.io/ucr-student-seminars/program/index.html>)
>>> for Winter 2023!
>>>
>>> Yash Aggarwal (4th year; PI: Flip Tanedo, Anson D'Aloisio) will talk
>>> about his research on dark matter and direct collapse black holes. For
>>> people who are interested in high-energy theory, reionization or black
>>> holes, please come join us!
>>>
>>> *Title: Impact of Dark Matter annihilation to UV photons on Cosmic
>>> Recombination and First Stars*
>>> Yash Aggarwal (University of California, Riverside)
>>>
>>> *Abstract:* WIMP-like Dark Matter particles are still the most
>>> promising candidates for the invisible matter. In a segment of these
>>> models, Dark Matter annihilates to a large multiplicity of soft Standard
>>> Model particles, which may have vastly different cosmological implications
>>> than the commonly studied s-wave annihilation. In this talk, we consider
>>> WIMP-like Dark Matter that annihilates to UV photons between 10-15 eV, the
>>> energy range to which most atoms and molecules are sensitive. We study the
>>> implications of this energy injection on Cosmic Recombination and the first
>>> star-forming Halos. We find that perturbations to Cosmic Recombination are
>>> sensitive to the annihilation spectrum, and they can be measured by Planck.
>>> We also find that Dark Matter annihilation can alter the dynamics of first
>>> star-forming halos, enough to lead to a runaway collapse of gases into a
>>> Black Hole, a scenario called Direct Collapse Black Holes.
>>>
>>> *Friday, 1/20, 2023, at 4pm*
>>> *Physics 3027 (Nebula Room)*
>>>
>>> About PASS:
>>> ---
>>> PASS is a weekly research seminar organized by and for grad students in
>>> UCR Physics and Astronomy department. The primary purpose of this seminar
>>> is to create a safe place for grad students to present their research
>>> works, at the same time, practice how to ask/answer good questions
>>>
>>> Due to speakers' availability, we will switch to every Wednesday at 4 pm
>>> starting next week. We have yet to decide on the speaker for next week. So
>>> stay tuned!
>>>
>>> Current pending speakers for Winter 2022 are in the spreadsheet
>>> <https://docs.google.com/spreadsheets/d/1xR325pj7zc9jlHSRb7UKDPtRwLuL3hKGxTIeBxi38wo/edit?usp=sharing>
>>> .
>>>
>>> Look forward to seeing you all on Friday!
>>> Ming-Feng
>>>
>>>
>>>
>>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ucr.edu/pipermail/physics-grads-open/attachments/20230120/ca71a28f/attachment-0001.html>