Starship Asterisk*

Nova Delphini 2013 on August 23rd, 01:01ut. Four images taken from the 16th, 18th, 23rd and Sept. 2nd, See Animation At:( http://www.jaicoa-observatory.com/SNDel ... im-EMr.gif ) Showing the Nova brightness differentials through this period (decreasing) and more on the red (Ha). A nova (plural novae or novas) is a cataclysmic nuclear explosion in a white dwarf star. It is caused by the accretion of hydrogen on to the surface of the star, which ignites and starts nuclear fusion in a runaway manner.

Nova Delphini 2013
Copyrights: Alessandro Dimai Nova Delphini spectra
Copyrights: Robert Minor

I am speechless with the dramatic change I saw of the recent Nova in the constellation of Delphinus.
In just 20 days the Nova turned from a bright blue color to an intense red/pink. It's magnitude dropped
considerably as well. Its one of the things you don't see everyday.

Its a fine example of what the great philosopher Heraclitus once said :

"There is nothing permanent except change."

(click for larger version)

hgg2013

Nova when in blue phase : http://www.astrovox.gr/forum/album_pic.php?pic_id=16823
Recent (red) : http://s14.postimg.org/cm1byoxn3/Nova_D ... _br_cb.png

Animation showing its transformation:

hgg2013

Thank you.
George Georgatos,
Kefallinia, Greece.

Here's a time evolution spectrum taken with an eshel spectrograph and a C14 since the discovery of the nova (August the 14Th) to the 5th september.

Hbeta region evolution



and the FeII lines risen "the iron age of the nova"


Olivier GARDE
ARAS group
FRANCE

Those are neat, Olivier. I wonder why the trough near 4840 disappears and then starts to reappear again at the end of the animation.

Nova Delphinus 2013
Taken September 15, 2013, 1 month and 1 day after it was discovered.
Photo Copyright University of Bradford
Photo Requested By: Kenneth Green at telescope.org

Nova Delphini Reddishing
Copyrights: Davide Manca