NGC 3718 (Arp214) & NGC 3729 – Interacting galaxies

NGC 3718 is a barred spiral galaxy located in the Big Dipper constellation about 45 million light years from the Milky Way.

It contains regions of ionized hydrogen and is an active galaxy of the Seyfert 1 type. Moreover, it is a LINER galaxy, i.e. a galaxy whose nucleus presents an emission spectrum characterized by broad lines of weakly ionized atoms.

NGC 3718 is also referenced in Arp’s atlas of peculiar galaxies, in the class of galaxies with either irregular structures (irregularities), noticeable dust lines (absorption), or a granular appearance (resolution). This class contains a mixture of interacting galaxies distorted by tidal interactions, nearby dwarf irregular galaxies, and spiral galaxies with unusually large amounts of gas.

NGC 3718 belongs to the first category, beeing in gravitational interaction with the nearby NGC 3729.

Takahashi TSA-102 f/6 – AZEQ6 – CCD AtikOne 6.0
Filters: Astronomik LRGB+Ha (6nm)
L : 108 x 600s bin1
R : 34 x 300s bin2
G : 24 x 300s bin2
B : 24 x 300s bin2
Ha : 24 x 300s bin2
Total : 26h50
Processing: Pixinsight & Photoshop
8, 13, 14 & 15 April 2021
Fouras (France)

Autore: Jean-Baptiste Auroux (sito)