Mathematics – Logic
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989scsmp..32..585m&link_type=abstract
Science in China, Series A - Mathematics, Physics, Astronomy and Technological Sciences (ISSN 0253-5831), vol. 32, May 1989, p.
Mathematics
Logic
Interstellar Matter, Stellar Evolution, Stellar Mass Ejection, Supernovae, Clouds, Density Distribution, Dwarf Galaxies, Energy Dissipation, Star Formation Rate, Supernova Remnants
Scientific paper
The influence of SN explosions on the evolution of low mass primordial clouds is discussed. Because of the low escape velocity from a low mass cloud the radiative phase of SNR evolution has been taken into account. Making general assumptions about the star formation rate and the initial mass function, the SN explosion rate has been calculated. The SN explosions will expel gas from a cloud in two ways: gradual boundary gas-driving and sudden and complete gas loss by multiple SN explosions. The slower the star formation occurs, the more important the boundary effect becomes. Numerical calculations on the variations of gas content with time show that if a low mass primordial cloud has a density as low as that of the present epoch dwarf E galaxies, the cloud will be destroyed by SN explosions inside them. However, a high density cloud in the same mass range will lose some of its gas and evolve to a low surface brightness system, which might be identified with a present-epoch dE galaxy.
Chen Shi
Ma Er
Yu Yun-Qiang
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