- 7 There Are Dwarf Galaxies With Low Total Masses Of About 108 M And Diameters Of Only A Few Kpc Some Types Of Such Dw 1 (268.93 KiB) Viewed 50 times
7. There are dwarf galaxies with low total masses of about 108 M. and diameters of only a few kpc. Some types of such dw
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7. There are dwarf galaxies with low total masses of about 108 M. and diameters of only a few kpc. Some types of such dw
7. There are dwarf galaxies with low total masses of about 108 M. and diameters of only a few kpc. Some types of such dwarf galaxies contain almost no gas. One explanation for this lack of gas is that supernovae from an earlier episode of star formation caused the ejection of the galaxy's gas from its gravitational potential. Is this plausible? Estimate how many supernovae it would take to remove the interstellar medium from such a dwarf galaxy. Explain clearly assumptions you make. Qualitative explanation how this could work, if at all: 2 marks Reasonable setup of an estimate (which equations): 2 marks Reasonable, justified values for relevant parameters: 2 marks Correct calculation: 2 marks Correct conclusion based on result: 1 mark Sensible attempt of a sanity check, e.g., compare to another 1 mark scenario you know: (Stating what you'd compare against can gain partial marks even if you did not do a calculation.)
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