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AZ Cas spectra at ingress

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Robin Leadbeater's picture
Robin Leadbeater
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Joined: 2012-10-08

Spectra of AZ Cas taken in the blue are showing dramatic changes associated with impending ingress. (see attached raw spectra)  Absorption lines from the outer atmosphere of the M star have appeared superimposed on the M star spectrum.

Robin

www.threehillsobservatory.co.uk

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AZCas_20121021_1117_annot.jpg48.73 KB
AZ Cas spectra at ingress
Robin Leadbeater's picture
Robin Leadbeater
Offline
Joined: 2012-10-08

That should read of course

..... superimposed on the B star spectrum

 

(Why is there  facilty for editing posts on this forum and why do I have to re-enter the thread title??)

 

Robin 

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484