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Re: (meteorobs) Leonids - colors?
In answer to Michael's question about color, I believe that one could
possibly say that the green color at the beginning of the trail might be
related to the forbidden line of atomic oxygen at 5577A. This green line
forms higher than the main part of the trail and may be what is seen first.
D.W.R. McKinley's book, Meteor Science and Engineering states on page 143,
quote, "There is a general tendency for excitation and ionization to build
up along the path of a fast meteor. This may appear to the eye as a
progressive color change from red to blue." The N2 bands and Na I doublet
in the red and orange may be strong at the beginning of the path, while Ca
II and Mg II in the blue violet are strong at the end of the path. Perhaps
one of our professionals could comment on this further.
Ed Majden - AMS Meteor Spectroscopy Project Coordinator
----- Original Message -----
From: Micheal Boschat <mboschat@ns.sympaticodot ca>
To: Meteorobs <meteorobs@jovian.com>
Sent: Tuesday, November 21, 2000 7:04 PM
Subject: (meteorobs) Leonids - colors?
> Hello:
>
> A curosity question.
>
> I looked at some other photographs taken of the Leonids and noted that
> a few seemed to start out green then go to the orangish-red color before
> terminating.
>
> Have these colors been noted on other photos from 1998 to now and
> if so would this give any clue to the Leonids makeup and to the "clumps"
> that
> Earth passes through?
>
> Clear skies
> =========================================
> Michael Boschat
> Halifax Center - Royal Astronomical Society of Canada
>
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