M81 Group and IFN

This image features a rich cosmic landscape in the direction of Ursa Major constellation. In the center M81, also known as Bode Galaxy, the largest one in its galaxy local group. Located at about 10 million light years, it is possible to see in pinkish hues the nebulas in it.
Near the upper right corner, another galaxy is visible, this one M82. Its is a starburst galaxy, which a high rate of star formation, as a result of the gravitational interaction with M81. As such, it features large hydrogen alpha structures originated from its center, here visible in red. On the left, a smaller galaxy – NGC 3077 – is located at about 13 million light years.
These galaxies, along with another 32, are part of M81 group, a local cluster neighboring our own local group.
Permeating the image faint nebula-like structures are visible. These are integrated flux nebula (IFN), dust clouds just outside our galaxy and illuminated by the luminosity of all the stars in it. IFN is really faint and quite challenging to capture.

This HaLRGB photo was taken using amateur backyard equipment from December.2021 and January.2022, in a total of 47 hours of integration, with the following distribution:
Ha: 272 x 300” = 22h40; shot at Barcarena, Portugal (Bortle 7)
RGB: 146 x 180” = 7h18; shot at Barcarena, Portugal (Bortle 7)
LUM: 332 x 180” = 16h36; shot at Santa Susana, Portugal (Bortle 4)

Autore: Andre Vilhena