[Mesa-users] Science Fair

[Jacqueline Goldstein]

Hi karan,

If I can ask some questions…

What is your background knowledge of physics and astronomy? 
How did you get the idea that you’re developing now?
What level is this science fair for? 
Are you working with an advisor or mentor? 

Sincerely,

Jacqueline Goldstein, Ph.D. (she/her/hers)
Astronomy | Life Sciences Communication 
University of Wisconsin — Madison
http://www.astro.wisc.edu/~jgoldstein



> On Feb 1, 2021, at 11:56 AM, Meisel, Zach via Mesa-users <mesa-users at lists.mesastar.org> wrote:
> 
> Hi Karan,
>  
> It may help to consider this paper: https://doi.org/10.1046/j.1365-8711.2000.03426.x <https://www.google.com/url?q=https://doi.org/10.1046/j.1365-8711.2000.03426.x&source=gmail-imap&ust=1612807079000000&usg=AOvVaw0_0L96edj-1yp-L_8aglwV>. Hurley, Pols, & Tout MNRAS 2000 looked at how metallicity impacts stellar evolution. It’s a bit intense for a science fair project, but may give you some ideas. For instance, Figure 20 shows how the mass of the remnant at the end stellar evolution is different for two different initial metallicities; Figure 3 compares stellar evolution tracks on the HR diagram; and Figure 4 essentially compares the rate at which core fuel is burnt.
>  
> The reasons for the various impacts can get a little complicated, so you’re going to want to cozy up with a stellar evolution textbook. Stan Woosley’s online notes discuss the impact of metallicity on stellar evolution on slide 12 of this lecture: http://www.ucolick.org/~woosley/ay220-15/lectures/lecture7.4x.pdf <https://www.google.com/url?q=http://www.ucolick.org/~woosley/ay220-15/lectures/lecture7.4x.pdf&source=gmail-imap&ust=1612807079000000&usg=AOvVaw0HBuS7T5bM5fHAd7sCVPBm>. Some good free books to consult are Ed Brown’s “To Build a Star” https://web.pa.msu.edu/people/ebrown/docs/intro-stellar-physics.pdf <https://www.google.com/url?q=https://web.pa.msu.edu/people/ebrown/docs/intro-stellar-physics.pdf&source=gmail-imap&ust=1612807079000000&usg=AOvVaw3uVvxGP4KaSfyno64z9-Qz> and Onno Pols’s “Stellar Structure and Evolution” http://www.ucolick.org/~woosley/ay112-14/texts/pols11.pdf <https://www.google.com/url?q=http://www.ucolick.org/~woosley/ay112-14/texts/pols11.pdf&source=gmail-imap&ust=1612807079000000&usg=AOvVaw0lEjgknJTkRIJiN0vrCEsB>. These are aimed at the advanced undergraduate or beginning graduate level.
>  
> -Zach
>  
> ----
> Zach Meisel
> Associate Professor of Physics & Astronomy
> Director, Edwards Accelerator Laboratory
> Ohio University
> Email: meisel at ohio.edu <mailto:meisel at ohio.edu>
> Web: http://inpp.ohio.edu/~meisel <http://inpp.ohio.edu/~meisel>
>  
> From: Karan Jain via Mesa-users <mailto:mesa-users at lists.mesastar.org>
> Sent: Monday, February 1, 2021 12:14 PM
> To: mesa-users at lists.mesastar.org <mailto:mesa-users at lists.mesastar.org>
> Subject: [Mesa-users] Science Fair
>  
> Hello MESA users,
>  
> I am having a bit of trouble with my science fair project. I am not too sure exactly what I should look for. I registered for the physics division of my science fair competition as there was no astrophysics or astronomy category. I am using MESA to evolve a star until the end of AGB. I have all the data, which are stars with a variable initial metallicity and initial mass of 2 solar masses, and I have successfully converted it all to NumPy arrays in python. I do not know where to go from here as my project is based around metalicity but I need to relate it to a physics concept. I was considering using machine learning and k-means clustering to see if I could find any patterns but I realized that would not help me too much. I was wondering if you have any advice as to how I should use the data that I have to relate the effects of a variable metallicity to a concept in physics and how I could use python to display that relationship. Attached is an inlist_defaults file that I am using for one model.
>  
> Thank You
> Karan Jain
> 
>  
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