PHYS 183 Lecture Notes - Lecture 19: Shot Glass, Protostar, Brown Dwarf
21 Apr 2018
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Turning point can tell you the age of the cluster because older cluster have a more intense turning point. Can simply see what hr diagram would tell you: here there are red giants, so must be older than. We divide typical stellar life into 4 phases: formation and pre-main sequence, main sequence, bulk of lifetime, post main sequence, (cid:862)death(cid:863) Central 0. 75 pc at infrared wavelengths : stars being born. Many different molecules observed eg ethyl alcohol. Pa(cid:272)e ship pulli(cid:374)g a fu(cid:374)(cid:374)el of dia(cid:373)eter (cid:1005) kilo(cid:373)eter (cid:373)o(cid:448)i(cid:374)g at (cid:1005)(cid:1004)% of the speed of light . (cid:449)ould take 1000 years to collect enough alcohol to fill a shot glass. Answer: b: no nuclear reactions because so cold. De(cid:374)sity pertur(cid:271)atio(cid:374) for(cid:373) (cid:862)(cid:272)ore(cid:863) for star for(cid:373)atio(cid:374) When core material very dense, nuclear reactions begin. Supports from further collapse: leaves pre-main sequence star, dusty cocoon. Protostar: undergoing unimpended gravitational collapse, little inside pressure.
