Star formation at low rates - the impact of lacking massive stars on stellar feedback
- Author(s)
- Gerhard Hensler, Patrick Steyrleithner, Simone Recchi
- Abstract
Due to their low masses dwarf galaxies experience low star-formation rates resulting in stellar cluster masses insufficient to fill the initial mass function (IMF) to the uppermost mass. Numerical simulations usually do not account for the completeness of the IMF, but treat a filed IMF by numbers, masses, and stellar feedback by fractions. To ensure that only entire stars are formed, we consider an IMF filled from the lower-mass regime and truncated where at least one entire massive star is formed.
By 3D simulations we investigate the effects of two possible IMFs on the evolution of dwarf galaxies: filled vs. truncated IMF. For the truncated IMF the star-formation self-regulation is suppressed, while the energy release by typeII supernovae is larger, both compared to the filled IMF. Moreover, the abundance ratios of particular elements yielded from massive and intermediate-mass stars differ significantly between the two IMF distributions.- Organisation(s)
- Department of Astrophysics
- Volume
- 11
- Pages
- 99 - 101
- No. of pages
- 3
- DOI
- https://doi.org/10.1017/S1743921316011261
- Publication date
- 03-2017
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Keywords
- ASJC Scopus subject areas
- Public Health, Environmental and Occupational Health, Astronomy and Astrophysics, Nutrition and Dietetics, Medicine (miscellaneous), Space and Planetary Science
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/29ce9a74-5288-46ae-80ed-1f814796989b