Celestial hemisphere:  Northern  ·  Constellation: Andromeda (And)
M31N 2008-12a, What an incredivel recurrent Nova (a rare or unique image), 



    
        

            Ruben Barbosa
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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), 



    
        

            Ruben Barbosa
Powered byPixInsight

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

Acquisition details

Dates:
Aug. 7, 2015
Frames:
H-Alpha: 20×180(1h)
Sloan u': 20×300(1h 40′)
Integration:
2h 40′
Avg. Moon age:
22.59 days
Avg. Moon phase:
45.35%

RA center: 00h45m29s.465

DEC center: +41°5415.65

Pixel scale: 0.304 arcsec/pixel

Orientation: -179.957 degrees

Field radius: 0.116 degrees

More info:Open 

Resolution: 1946x1931

File size: 1.9 MB

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

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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

Description: H-alpha

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



    
        

            Ruben Barbosa