Re: [nbos] Stellar Radius - Mass - Luminosity Parameters.
"Dalton Calford"
Fri Feb 22nd, 2008
I may begin by posting the stellar values that I have as a base point.
Alot of the information has been extrapulated from Traveller book 6
Scouts, so it needs a good peer review.

I will wait to see what Ed thinks of the project before I start
clutering up his wiki space.


On Thu, 2008-02-21 at 10:41 -0500, Doug Jessee wrote:
> I like the idea of posting it to the wiki and having people comment on
> the stars. May take some time, but if you dont start, you cant finish.
>
> LDJ
>
> On Thu, Feb 21, 2008 at 10:22 AM, Dalton Calford
> <dcalford-at-distributel.ca> wrote:
> Thanks everyone who replied.
>
> I have a series of values already, as long as the star is
> within a
> particular format, unfortunately, not all of the stars listed
> fit that
> format.
>
> I was thinking about posting the values I have to the wiki,
> along with
> the star data so that we can get some of us working on it
> together.
>
> What does everyone think of this idea?
>
> I am hoping to have a detailed csv created that includes all
> the stars
> within 10000 ly detailing multiples and other such data.
>
> The original lists posted up at nox are a bit out of date and
> are
> missing a great deal of the new stars found within that
> radius.
>
> For example the nox 10000ly+ file lists 87,000 stars, while
> the new data
> has over 120,000 stars in that same volume of space.
>
> I have about 2,300 stars that need reviewing to properly gauge
> what they
> are.
>
> As the data holds all the catalog numbers etc, it would
> require someone
> to look up the particular star, ensure we have the right data
> for it and
> update the wiki for that one entry.
>
> here is a sample of stars that don't match up with known
> values
>
> A0Ia comp
> A0Ia(p)
> A0Ia0
> A0Ia:
> A0Iab
> A0Iab-Ib
> A0Iae
> A0MNp...
> A0V + A2V
>
> Now, we may find that some are actually two stars or that it
> is a
> standard star which I don't have the proper values for.
> It could also be as simple as a typo in the starlist.
>
> I still need the formula's but I would like to get feedback as
> to
> whether people are willing to help and if the nbos wiki is the
> best
> place to perform the work.
>
> best regards
>
> Dalton
>
>
> On Thu, 2008-02-21 at 09:31 +1100, Justin Akkerman wrote:
> > From: "Dalton Calford" <dcalford-at-distributel.ca>
> > Subject: [nbos] Determining Stellar Values
> >
> > But I need a formula for the Mass and Radius of the
> Star,
> > given the
> > above data.
> >
> > Does anyone know how to get this information
> (expressed as an
> > excel
> > formula if possible)
> >
> > I will look thses values up in my University Astrophysics
> text
> > tonight. If I recall, the formulas relating radius mass and
> luminosity
> > will only be working if it is main sequence. For example
> when a star
> > goes red giant, it does not gain any mass but its radius
> puffs up
> > greatly.
> >
> > Can I post excel files to this forum?
> >
> > If not I will make sure that they are excel friendly.
> >
> > Justin.
> >
> >
>
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> >
> >
>
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