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M31N 2008-12a, What an incredivel recurrent Nova (a rare or unique image), 





    
        

            Ruben Barbosa
M31N 2008-12a, What an incredivel recurrent Nova (a rare or unique image)

M31N 2008-12a, What an incredivel recurrent Nova (a rare or unique image)

Technical card

Imaging telescope or lens:The Liverpool Telescope

Imaging camera:IO:O

Software:Maxim DL, Gimp

Resolution: 1958x1900

Dates:Aug. 7, 2015

Frames:
H-Alpha: 20x180"
Sloan u': 20x300"

Integration: 2.7 hours

Avg. Moon age: 22.59 days

Avg. Moon phase: 45.35%

Astrometry.net job: 2541392

RA center: 11.370 degrees

DEC center: 41.906 degrees

Pixel scale: 0.304 arcsec/pixel

Orientation: 179.939 degrees

Field radius: 0.115 degrees

Data source: Professional, scientific grade data

Description

M31N 2008-12a is a remarkable recurrent nova within the Andromeda Galaxy.

I searched the internet for images of this Nova but just found a yellowish image with low definition. So, I suppose this image is unique. It was then that I decided to try alternative processing.

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With eleven eruptions now identified, including eight in the past eight years, the system exhibits a recurrence period of one year, and possibly just six months.

This short inter eruption period is driven by the combination of a high mass white dwarf (1.38 MSun) and high mass accretion rate. Such a high accretion rate appears to be provided by the stellar wind of a red giant companion.

Deep Hα observations have revealed the presence of a vastly extended nebula around the system, which could be the ‘super-remnant’ of many thousands of past eruptions.

With a prediction of the white dwarf reaching the Chandrasekhar mass soon, M31N 2008-12a has become the leading pre-explosion type Ia supernova candidate.

More information by M. J. Darnley can be found here: arXiv.org (Nov./2016).

Recent updated analysis predicts that the M31N 2008-12a white dwarf could reach the Chandrasekhar mass in < 20 kyr. More information here: arXiv.org (Set./2017).

See Nova's location in here:

Comments

Author

RRBBarbosa
Ruben Barbosa
License: None (All rights reserved)
5635
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  • M31N 2008-12a, What an incredivel recurrent Nova (a rare or unique image), 





    
        

            Ruben Barbosa
    Original
  • M31N 2008-12a, What an incredivel recurrent Nova (a rare or unique image), 





    
        

            Ruben Barbosa
    E
  • Final
    M31N 2008-12a, What an incredivel recurrent Nova (a rare or unique image), 





    
        

            Ruben Barbosa
    F

E

H-alpha

Sky plot

Sky plot

Histogram

M31N 2008-12a, What an incredivel recurrent Nova (a rare or unique image), 





    
        

            Ruben Barbosa