Jump to content


Photo

Nova Del 2013: Some Colour Impressions.

  • Please log in to reply
10 replies to this topic

#1 David Gray

David Gray

    Viking 1

  • *****
  • Posts: 556
  • Joined: 06 Aug 2012
  • Loc: Co. Durham UK

Posted 07 October 2013 - 05:08 AM

As with some novae I have followed in the past I have been fascinated by the colours displayed as they develop. In particular one in Vulpecula (1960/70s) came to display an intense mauve/magenta hue (pink to some). If I recall right this was ascribed as it going through the “nebular phase”. More recently one in either Cygnus or Cassiopeia became the most intensely blue star I’ve ever seen!

While conceding the subjectivity of colour perception/judgement and so on (and differences with others’ monitors and such) a few details about these impressions……

Aug 15: Creamy Yellow. Aug 19: slightly more Yellow. Aug 26: Peach! Aug 30: Buttercup Yellow.

Early Sep. it started to display hues that I struggled to name but opted for Bronze/Coppery-Yellows.

Then it reddened markedly and even so could not quite equate it to the redness of carbon stars V Aql or of X Sge which was more near the nova’s brightness then.

The last (Oct 5) observation showed a more definite difference to X Sge: it was now fainter than X but looked slightly more toward red-violet.

David

Attached Files



#2 Asbytec

Asbytec

    Guy in a furry hat

  • *****
  • Posts: 8067
  • Joined: 08 Aug 2007
  • Loc: La Union, PI

Posted 07 October 2013 - 05:38 AM

David, that's amazing. I have never seen anything like it. Really wish I could have observed something that spectacular.

#3 Jeremy Perez

Jeremy Perez

    Vanguard

  • *****
  • Posts: 2139
  • Joined: 12 Aug 2004
  • Loc: Flagstaff, Arizona, USA

Posted 07 October 2013 - 10:28 AM

This is incredible, David! The way you crafted your observations into such an informative and captivating information graphic is excellent. Thanks for sharing all your hard work.

#4 David Gray

David Gray

    Viking 1

  • *****
  • Posts: 556
  • Joined: 06 Aug 2012
  • Loc: Co. Durham UK

Posted 07 October 2013 - 11:34 AM

Thanks Norme/Jeremy,

Jeremy got your PM and that will be fine - honoured.!

"Hard work": had it in mind for some time - started to look daunting as the observations piled up; but went pretty smooth!

Regards,
David.

#5 niteskystargazer

niteskystargazer

    Gemini

  • *****
  • Posts: 3052
  • Joined: 05 Oct 2009
  • Loc: 41-43'-28" N 87-42'-39" W

Posted 07 October 2013 - 01:41 PM

David,

Very nice, showing the Color Changes of the Nova Del :).

CS,KLU,

:thanx:,

Tom

#6 Jef De Wit

Jef De Wit

    Mercury-Atlas

  • *****
  • Posts: 2732
  • Joined: 06 Mar 2009
  • Loc: Hove, Belgium

Posted 08 October 2013 - 12:40 PM

Impressive observations! I already did some 10 estimation of the magnitude, but never mentioned any color. Will have a better look next time.

#7 David Gray

David Gray

    Viking 1

  • *****
  • Posts: 556
  • Joined: 06 Aug 2012
  • Loc: Co. Durham UK

Posted 08 October 2013 - 03:30 PM

Thanks Tom / Jef,

Yes it's well worth following these for colours which can be quite surprising at times.

Cheers,
David.

#8 azure1961p

azure1961p

    Voyager 1

  • *****
  • Posts: 10255
  • Joined: 17 Jan 2009
  • Loc: USA

Posted 08 October 2013 - 08:13 PM

David, that's amazing. I have never seen anything like it. Really wish I could have observed something that spectacular.


Agreed - and I had no idea it reddened like that or I would've looked. I thought it'd dim out and - oh well. The color shift is actually captivating. Serves me right for not being enough of a variable star guy.

Nice - rendering ;) - and presentation David.

Pete

#9 mikesemmler

mikesemmler

    Messenger

  • -----
  • Posts: 413
  • Joined: 01 Jun 2009

Posted 08 October 2013 - 11:04 PM

This is great, i can not believe it, this is a scetch? Sensational :bow: :bow: :bow:

Michael

#10 Aquarellia

Aquarellia

    Viking 1

  • -----
  • Posts: 758
  • Joined: 27 Oct 2012
  • Loc: Provence, France

Posted 09 October 2013 - 04:46 AM

Super David, a very creative show !

#11 David Gray

David Gray

    Viking 1

  • *****
  • Posts: 556
  • Joined: 06 Aug 2012
  • Loc: Co. Durham UK

Posted 09 October 2013 - 07:37 AM

Michael / Aquarellia,

Appreciated.

Many thanks,
David.






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics