Re: [APML] Table of emission lines-a bit more

["bert katzung" <katzung1@home.com>]

Hi Chuck:
Thanks for the input. I figured the Trapezium was one of the worst examples,
but it's the only non-planetary data I could find. I compromised by putting
the Trapezium data PLUS data from three planetaries in the current version
of the table at
http://www.astronomy-images.com/EmissionLines-1.htm
  The planetary data are from a very nice link that Steve Banbury put me
onto. Also, I think Roger has sent me some more data, so that may allow me
to put in a more representative emission example.
Bert

Bert Katzung
katzung1@home.com
www.astronomy-images.com

----- Original Message -----
From: "Chuck Vaughn" <aa6g@aa6g.org>
To: <astro-photo@seds.org>
Sent: Friday, 10 August, 2001 6:07 AM
Subject: Re: [APML] Table of emission lines-a bit more


> Bert,
>
> > Hi List:
> > Relative to a couple of things regarding the emission line data:
> > I checked AMOACP and Figure 7.5 shows the lines and their intensities
for
> > the Trapezium. The He[1] line at 5876 is about 10% as high as the Halpha
> > line. Not sure whether that qualifies as "major" or not
>
> 10% is significant in my book but you probably shouldn't use the Trapezium
> as a typical nebula for your table. Look how strong OIII is, certainly not
> typical! The problem is what to choose as major emission lines since they
> vary significantly from nebula to nebula. You can count on H-a but not
much
> of anything else, at least when it comes to contributing to the color of
> the nebula.
>
> Chuck <aa6g@aa6g.org>
>
>
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