Hello everyone and welcome back to my blog! These last 2 weeks, I’ve been working on my model, and at the moment I’m almost done. I based my model around all of the research that I looked at, and I decided on an approach that has 3-4 “areas”, depending on how you want to look at it. There’s the outer halo (kind of like a sphere of gas and stars), the disk, and the central quasistar (which can be looked at as the black hole and the surrounding shell). Now, I will go over some of the more basic parts of my model.

The Setting

I decided to start at a redshift of z=10 (500 million years after the Big Bang). I had the starting halo mass equal to 83,000,000 solar masses, the temperature at 10,000 K, and the velocity at 17 km/s. From there, I calculated the halo radius to be 4100 lightyears and the disk mass to be 2,490,000 solar masses.

The Quasistar

I decided that the quasistar should start forming at z=10. I settled on a fixed rate that it would grow at (0.2 solar masses/yr). At that rate it would reach 3600 solar masses in 18,000 years, and the black hole would appear then. Until the black hole forms, the quasistar has a constant radius of around 300,000,000 km, or 2 times Earth’s orbit. After the black hole forms, the quasistar would begin to grow in size and cool down. It would eventually dissipate around the time its temperature drops below 10,000 K, after which it leaves behind a black hole.

I only showed some of what I have done with the model because some of the math and concepts get too complex for me to explain in a blog post. Right now, I still have a few things I need to iron out, but overall my project is going well. All that being said, thank you for reading this week’s blog post, and I hope to see you next week as well!