Olof Petter Nils Axel NebrinPhD student

About me

How did the first stars and galaxies form? What is the nature of dark matter and dark energy? How did the Universe begin, and how will it all end? These are some of the questions tackled by cosmology, which is the field I am working in as a PhD candidate at the Department of Astronomy. I am mostly focused on developing a physically comprehensive model for the formation of the first stars and galaxies in early small dark matter halos called Anaxagoras, from which detailed predictions and comparisons to observations can be made. In doing so we can test our understanding of how the Universe began and assumptions about dark matter. While mainly focusing on the first stars and galaxies, I have fairly wide research interests covering some of the cosmological questions mentioned earlier.

Research papers:

1. O. Nebrin, S. K. Giri, G. Mellema (2023) Starbursts in low-mass haloes at Cosmic Dawn. I. The critical halo mass for star formation, Monthly Notices of the Royal Astronomical Society, vol. 524, Issue 2, pp. 2290-2311 
2. O. Nebrin (2023) Case A or Case B? The Effective Recombination Coefficient in Gas Clouds of Arbitrary Optical Thickness, Research Notes of the AAS, vol. 7, Issue 5, id. 90.
3. O. Nebrin, R. Ghara, G. Mellema (2019) Fuzzy dark matter at cosmic dawn: new 21-cm constraints,  

   Journal of Cosmology and Astroparticle Physics, Issue 04, article id. 051 (2019)

Research projects

Ongoing

Completed

Explorations of the Epoch of Reionization

The Epoch of Reionization is the period when the first stars and galaxies formed, some 13 billion years ago. During this period ionizing light produced in these galaxies escaped into the medium inbetween the galaxies. This resulted in a gradual ionization and heating of the entire Universe.