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Nova Del, Fe lines on the rise.

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#1 old_frankland

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Posted 11 October 2013 - 04:32 PM

Nothing quantitative, but relative to the H-beta peak, several Fe lines, particularly Fe [II] @ 5007 seems to show an increase. Anyone else see this in recent spectra?

http://www.lafterhal...01-11ut_001.jpg

Nova Del is fading fast, now at 10.2 magnitude.

#2 NJScope

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Posted 15 October 2013 - 03:23 PM

Jim:

Nova Del is in its nebular phase so that I'm not sure that your assignment of the Fe I line at 4629 A and [Fe II] lines at 4929 and 5007 A are entirely correct. There certainly is some blending of multiple emission lines, however, I believe the predominant line at 4630 is related to N III while that at 5007 A is associated with [O III]. Perhaps one of the spectroscopy experts that visit this forum can enlighten both of us. For reference, I've included an annotated spectrum taken last night (10 x 90 s) with a low resolution spectrophotometer.

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#3 old_frankland

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Posted 15 October 2013 - 03:55 PM

If indeed Nova Del is in the nebular phase, your suggestion that N[III] and O[III] would certainly make more sense. I based my captions on published spectra from several weeks earlier. Still lots to learn about Novae - so far it has been fascinating. Thanks for the input!

#4 old_frankland

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Posted 15 October 2013 - 11:42 PM

Kevin, nice work, by the way!

Was the spectra recorded with the DSS-7?

#5 NJScope

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Posted 16 October 2013 - 09:19 AM

Jim:

Thank you and yes, this spectrum was obtained with the DSS-7. I've been following Nova Del 2013 since Aug 20th and submitting the spectra to ARAS spectral database. The past two months has been the first sustained use of this equipment since purchasing it 4 years ago.

#6 old_frankland

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Posted 19 October 2013 - 01:51 PM

Kevin, the O [III] peak @ 5007 continues to rise. Interesting that the O I peak @ 8446 has declined significantly in the last couple weeks.

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