R Sct very deep minimum

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Robin Leadbeater
Posts: 1926
Joined: Mon Sep 26, 2011 4:41 pm
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R Sct very deep minimum

Post by Robin Leadbeater »

The pulsating variable R Sct has just gone through a very deep (record breaking?) minimum. At previous deep minima it has shown an unusual spectrum
http://cdsads.u-strasbg.fr/cgi-bin/nph- ... ..95..762H
The star is quite bright ~mag 8 so it could be a good opportunity for someone to take a high resolution Eshel spectrum

Cheers
Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
Robin Leadbeater
Posts: 1926
Joined: Mon Sep 26, 2011 4:41 pm
Contact:

Re: R Sct very deep minimum

Post by Robin Leadbeater »

Athough it is well past minimum now, I had a quick look at R Sct last night (LHIRES 1200) at a similar resolution and wavelength range as in the paper referenced above which covers a previous deep minimum in 1981. (fig 3)
The absorption spectrum is similar but apart from H alpha which shows weak emission, the other 1981 emission lines are in absorption in my spectrum. See attached spectrum and overlay with the 1981 minimum spectrum

Cheers
Robin
Attachments
RSct_19810926_20130726.png
RSct_19810926_20130726.png (50.66 KiB) Viewed 6843 times
rsct_20130726_necal_telrem_respcor_annot.png
rsct_20130726_necal_telrem_respcor_annot.png (7.97 KiB) Viewed 6843 times
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
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