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- Path: sparky!uunet!usc!sdd.hp.com!uakari.primate.wisc.edu!ames!pacbell.com!well!metares
- From: metares@well.sf.ca.us (Tom Van Flandern)
- Newsgroups: sci.astro
- Subject: Re: A super-blue branch of super-massive stars?
- Message-ID: <BtEE53.586@well.sf.ca.us>
- Date: 22 Aug 92 18:31:50 GMT
- References: <1992Aug12.193037.8447@mcshub.dcss.mcmaster.ca> <Bt5t07.IrL@well.sf.ca.us> <1992Aug18.135704.17632@mcshub.dcss.mcmaster.ca>
- Sender: news@well.sf.ca.us
- Organization: Whole Earth 'Lectronic Link
- Lines: 52
-
-
- Earlier, I wrote:
-
- >> Small dwarf galaxies generally don't produce supermassive stars. The best
- >> candidates would be relatively blue galaxies with lots of young O-stars.
- >> Apparently M87 is the most prolific producer among "nearby" galaxies.
-
- and fischer@physun.physics.mcmaster.ca (Phil Fischer) replied:
-
- > the LMC has very many O stars and is indeed relatively blue. Secondly, M87
- > is not at all blue and has no O stars. Are you sure you have a good
- > understanding of the observations?
-
- and gsh7w@fermi.clas.Virginia.EDU (Greg Hennessy) writes:
-
- > But HST and UIT observations show that M87 is not a UV bright object, with
- > the exception of the synchrotron jet.
-
- The field density of quasars around M87 is denser than in most sky areas
- sampled, which is why I picked it as an example. I do not have any new ideas
- about specific causes of different morphologies and populations in different
- galaxies. They obviously come in giant and dwarf sizes, some filled with
- giant stars and others of low surface brightness. I presume that whatever
- induces a galaxy to have more giant stars in comparison to dwarfs, the same
- factors apply to supermassive star production. I further presume that
- whatever factors promote more red giant production than blue, or vice versa,
- the same factors apply to red versus blue supermassive star production.
- Either of these can become quasars in the Meta Model.
-
- Greg, the idea that some supermassive stars will be UV bright was
- brought up in connection with the discussion of the B-O galaxies. It is not
- a requirement for the progenitors of all, or even most, quasars.
-
- [Phil continues:]
- > since everything in your theory comes from first principles, what first
- > principles does a lack of supermassive stars in the LMC stem from? This
- > sounds like an ad-hoc post-facto addition, i.e. we see quasars in M87
- > therefore it produces them, we don't see them in the LMC therefore it does
- > not produce them.
-
- I hope the preceding clarifies that it is indeed an entirely ex post
- facto idea. In answering questions about this or that in connection with the
- Meta Model, I am often forced to suggest explanations in areas of astronomy
- where I have little expertise, and which are certainly well outside of the
- area to which the MM itself has yet been extended by me. If the model proves
- deserving, I hope that qualified astronomers will extend it properly into
- these domains, eliminating the need for my meager speculations. -|Tom|-
-
- --
- Tom Van Flandern / Washington, DC / metares@well.sf.ca.us
- Meta Research was founded to foster research into ideas not otherwise
- supported because they conflict with mainstream theories in Astronomy.
-