R Sct very deep minimum

Information about outbursts of eruptive stars, Be activity, ...

R Sct very deep minimum

Postby Robin Leadbeater » Thu Jul 25, 2013 10:07 am

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 ALPY 600 Star Analyser 100/200 ATIK314L+ C11 EQ6
http://www.threehillsobservatory.co.uk
Robin Leadbeater
 
Posts: 472
Joined: Mon Sep 26, 2011 4:41 pm

Re: R Sct very deep minimum

Postby Robin Leadbeater » Sat Jul 27, 2013 9:50 am

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 766 times
rsct_20130726_necal_telrem_respcor_annot.png
rsct_20130726_necal_telrem_respcor_annot.png (7.97 KiB) Viewed 766 times
LHIRES III #29 ALPY 600 Star Analyser 100/200 ATIK314L+ C11 EQ6
http://www.threehillsobservatory.co.uk
Robin Leadbeater
 
Posts: 472
Joined: Mon Sep 26, 2011 4:41 pm


Return to Outbursts and alerts

Who is online

Users browsing this forum: No registered users and 1 guest

x