Dr Anish M. Amarsi

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Theoretical astrophysics
Department of Physics and Astronomy
Uppsala University
Box 516, 75120 Uppsala
Sweden
Email: anish.amarsi [at] physics.uu.se
 
I am a researcher at Uppsala University. Before that, I was a postdoc here (Dec 2019 -- Apr 2021), and before that a postdoc at MPIA, Germany (Dec 2016 -- Nov 2019). Earlier, I was a PhD student at Mount Stromlo Observatory, Australia (2013 -- 2016), and a BA/MSci student at the University of Cambridge, UK (2009 -- 2013).
I work on making accurate models of the light that emerges from stars like the Sun. By comparing these models against real observations of stars, it is possible to infer essential properties of the stars --- in particular, their chemical compositions. To a good approximation, the present-day chemical compositions of Sun-like stars reflect the compositions of the gas from which the stars formed at their respective times of birth. Thus, by studying stars of different ages and different orbits in this manner, it is also possible to learn about the history and evolution of our Galaxy and the cosmos.
 
Research:
3D non-LTE radiative transfer
Spectroscopic models of late-type stars
Stellar parameters and chemical compositions
Galactic chemical evolution
Publications:
ADS
ORCID
PDF
PhD thesis
Data:
1D non-LTE abundance corrections for 13 elements (Amarsi+ 2020)
1D non-LTE departure coefficients for 13 elements (Amarsi+ 2020)
3D non-LTE C1, O1, Fe2 abundance corrections (Amarsi+ 2019)
1D non-LTE potassium abundance corrections (Reggiani+ 2019)
3D non-LTE hydrogen Balmer line profiles (Amarsi+ 2018)
1D non-LTE silicon abundance corrections (Amarsi & Asplund 2017)
1D/Mean-3D non-LTE iron abundance corrections (Amarsi+ 2016)
3D non-LTE oxygen equivalent widths and abundance corrections (Amarsi+ 2015,2016)
Links:
Theoretical atomic astrophysics research at UU
VR project description
1D non-LTE abundance corrections via INSPECT
Atomic data and codes via Paul Barklem's github page
UU Astronomy/Space Physics seminars
Open postdoc position at UU


Last updated: Mar 2022