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Testing stellar yield prescriptions in OMEGA+: Implications for rising sodium abundances in young thick disc stars
Evans K. Owusu, Ashley J. Ruiter, Alex J. Kemp +8
We recently identified an upturn in [Na/Fe] for the population of Solar-type stars in the Galactic young thick disc () at super-Solar metallicity in…
At the same age, metallicity, and alpha-enhancement, sodium is a more effective tracer of the young and old sequences of the Milky Way disc
Evans K. Owusu, Sven Buder, Ashley J. Ruiter +2
Trends in the enrichment of elements with stellar ages are a powerful avenue to identify unexplained origins of the elements. We investigate the stellar abundance trends of low to…
Evidence for a Dense, Inhomogeneous Circumstellar Medium in the Type Ia SNR 0519-69.0
Brian J. Williams, Parviz Ghavamian, Ivo R. Seitenzahl +3
We perform an expansion study of the Balmer dominated outer shock of the SNR 051969.0 in the LMC by using a combination of new HST WFC3 imagery obtained in 2020 and archival ACS…
Observational constraints on the origin of the elements. V. Non-LTE abundance ratios of [Ni/Fe] in Galactic stars and enrichment by sub-Chandrasekhar mass SNe
P. Eitner, M. Bergemann, A. J. Ruiter +4
We constrain the role of different SN Ia channels in the chemical enrichment of the Galaxy by studying the abundances of nickel in Galactic stars. We investigate four different SN…
First extragalactic measurement of the turbulence driving parameter: ALMA observations of the star-forming region N159E in the Large Magellanic Cloud
Piyush Sharda, Shyam H. Menon, Christoph Federrath +13
Studying the driving modes of turbulence is important for characterizing the impact of turbulence in various astrophysical environments. The driving mode of turbulence is parameter…
Imagery and UV Spectroscopy of the LMC Supernova Remnant N103B Using HST
William P. Blair, Parviz Ghavamian, John C. Raymond +6
We present HST/WFC3 multiband imagery of N103B, the remnant of a Type Ia supernova in the Large Magellanic Cloud, as well as HST/COS ultraviolet spectroscopy of the brightest radia…