Dwingeloo 2

Dwingeloo 2 is a dwarf irregular galaxy at a distance of about 10 million light years from our solar system and was discovered in the screening of the Dwingeloo Obscured Galaxy Survey ( DOGS) in 1996. The galaxy is located in the constellation of Cassiopeia and is situated in the Galactic plane in the so-called Zone of Avoidance of the Milky Way, known for the background with a high number of stars and interstellar dust to hide. It is a satellite galaxy of Dwingeloo 1

Properties

Dwingeloo 2 was first identified as part of a follow-up after the discovery of Dwingeloo 1 within the radio astronomy by their radio emission from the 21 cm emission line of neutral hydrogen.

The galaxy is a member of the Maffei group, a group of galaxies in close proximity to our Local Group. and away from our Milky Way at a speed of about 241 km / s

The apparent visible radius of Dwingeloo 2 is about 2 minutes of arc, which corresponds to kpc at a distance of 3 Mpc in about 2 absolute.

Dwingeloo 2 has a clearly emerging rotating disk neutral hydrogen gas with an inclination of about 69 ° with respect to the observation direction. The distribution is relatively uneven and lies at a distance of 3.2 kpc from the center of its galaxy. The estimated total mass within this distance amounts to 2.3 billion ☉ M, the mass of the gas alone is estimated at 100 million M ☉. Thus the total mass of Dwingeloo 2 by a factor of 5 is smaller than the first of Dwingeloo

The irregular structure of Dwingeloo 2 is very likely that by the interaction with its much larger neighbor galaxy Dwingeloo 1, which is located in only 24 kpc distance from her.