On Sunday, October 11, 2020 at 8:37:29 PM UTC-6, Lawrence Crowell wrote: > > After LC
*Do all BB theories contain the reheating postulate? AG* > > > On Sunday, October 11, 2020 at 8:57:20 PM UTC-5 [email protected] wrote: > >> >> >> On Sunday, October 11, 2020 at 8:07:33 AM UTC-6, Lawrence Crowell wrote: >>> >>> On Sunday, October 11, 2020 at 5:42:53 AM UTC-5 [email protected] >>> wrote: >>> >>>> >>>> >>>> On Sunday, October 11, 2020 at 4:25:04 AM UTC-6, Lawrence Crowell wrote: >>>>> >>>>> >>>>> >>>>> On Saturday, October 10, 2020 at 8:52:58 PM UTC-5 [email protected] >>>>> wrote: >>>>> >>>>>> >>>>>> >>>>>> On Saturday, October 10, 2020 at 5:25:35 PM UTC-6, Lawrence Crowell >>>>>> wrote: >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Saturday, October 10, 2020 at 5:32:25 PM UTC-5 >>>>>>> [email protected] wrote: >>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> On Saturday, October 10, 2020 at 1:03:00 PM UTC-6, Lawrence Crowell >>>>>>>> wrote: >>>>>>>>> >>>>>>>>> On Friday, October 9, 2020 at 12:27:00 PM UTC-5 >>>>>>>>> [email protected] wrote: >>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> On Friday, October 9, 2020 at 3:53:46 AM UTC-6, Lawrence Crowell >>>>>>>>>> wrote: >>>>>>>>>>> >>>>>>>>>>> I read this yesterday. It so far appears there is no data to >>>>>>>>>>> support information from a prior cosmic cycle. >>>>>>>>>>> >>>>>>>>>>> Penrose did ground breaking work on the nature of black holes >>>>>>>>>>> and I think his crowning achievement in mathematical physics is >>>>>>>>>>> twistor >>>>>>>>>>> theory of the mid 70s. His CCC theory is a bit like Hoyle's steady >>>>>>>>>>> state >>>>>>>>>>> theory in that it is a sort of intended obstruction to a more >>>>>>>>>>> successful >>>>>>>>>>> theory that is gaining support. >>>>>>>>>>> >>>>>>>>>>> LC >>>>>>>>>>> >>>>>>>>>> >>>>>>>>>> *Please clarify your last sentence above. What "more successful >>>>>>>>>> theory" are you referring to; the hot BB with inflation? AG * >>>>>>>>>> >>>>>>>>> >>>>>>>>> Primarily back then it was just BB. Now with inflation a much >>>>>>>>> wider range of problems have been solved, and it is supported by CMB >>>>>>>>> data. >>>>>>>>> >>>>>>>>> LC >>>>>>>>> >>>>>>>> >>>>>>>> *Has anyone proposed a Cold BB, which seems illogical since one can >>>>>>>> imagine an expanding universe backward in time; that is, contracting >>>>>>>> and >>>>>>>> getting denser and hotter? AG * >>>>>>>> >>>>>>> >>>>>>> As a rule the more a gas is compressed the hotter it gets. >>>>>>> >>>>>>> LC >>>>>>> >>>>>> >>>>>> Of course. Does that mean a COLD BB has never been proposed because >>>>>> it defies our understanding of how a contracting gas behaves? AG >>>>>> >>>>> >>>>> Yes. >>>>> >>>>> LC >>>>> >>>> >>>> *TY. Then it cools as it expands. But why do some, or is it all BB >>>> theories, propose a "reheating" phase? How could it reheat if it is still >>>> expanding? What's the need for reheating? AG * >>>> >>> >>> That involves the vacuum physics of inflation. It is analogous to a >>> phase transition and the reheating might be compared to latent heat of >>> fusion. >>> >>> LC >>> >> >> *Does reheating occur before or after inflation? Is this the case for >> every (hot) BB theory? AG* >> > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/3681ca8c-4897-4972-9920-f15530323c26o%40googlegroups.com.
