Andromeda Galaxy [Ultra-deep version 2020] (Giuseppe Donatiello)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: Andromeda Galaxy · M 110 · M 31 · M 32 · NGC 205 · NGC 221 · NGC 224 · The star 32And · The star νAnd

Andromeda Galaxy [Ultra-deep version 2020], Giuseppe Donatiello

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Andromeda Galaxy [Ultra-deep version 2020]

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Andromeda Galaxy [Ultra-deep version 2020]

This is the sum of many images acquired over several years, mainly with telephoto lenses and small refractors.

It is also part of a larger mosaic covering the entire 400 kpc region around M31. Of course, this image does not have "aesthetic" purposes but only for study.

About ultra-deep imaging, I suggest the reading of this scientific paper: https://arxiv.org/pdf/2001.05746.pdf

This image offers a good overview of the main structures on the disc and the external halo of Andromeda (M31).

The disc appears quite regular and there is an abundant presence of young stars, gases and abundant dusts. The bulge is dominated by an older population. The external halo presents various irregularities and thickenings that we can consider as vestiges of dwarf galaxies incorporated progressively by the greater galaxy, as foreseen by the growth models.

M31 is thought to have assimilated a few hundred small galaxies or globular clusters.

This process is still ongoing.

Scientific data are available on request for serious galactic archeology studies.

See also: https://www.astrobin.com/pt21d1/

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Andromeda Galaxy [Ultra-deep version 2020]

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