Dwingeloo 1 & 2 - Radiotelescoop Dwingeloo NL
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dreamhummie
N 52° 48.727 E 006° 23.775
32U E 324520 N 5854548
Dwingeloo 1 & 2 are eventually named after the 25m radio telescope in Dwingeloo,The Netherlands that was used in the Dwingeloo Obscured Galaxy Survey (DOGS) survey and first detected it. The telescope is located in National Park Dwingelderveld
Waymark Code: WMNQZC
Location: Drenthe, Netherlands
Date Posted: 04/22/2015
Views: 13
Dwingeloo 1 is a barred spiral galaxy about 10 million light-years away from the Earth, in the constellation Cassiopeia. It lies in the Zone of Avoidance and is heavily obscured by the Milky Way. The size and mass of Dwingeloo 1 are comparable to those of Triangulum Galaxy.
Dwingeloo 1 has two smaller satellite galaxies: Dwingeloo 2 and MB 3 and is a member of the IC 342/Maffei Group of galaxies.
The Dwingeloo 1 galaxy was discovered in 1994 by the Dwingeloo Obscured Galaxy Survey (DOGS), which searched for neutral hydrogen (HI) radio emissions at the wavelength of 21 cm from objects in the Zone of Avoidance. In this zone gas and dust in the disk of the Milky Way galaxy block the light from the galaxies lying behind it.
The galaxy was, however, first noted as an unremarkable feature on Palomar Sky Survey plates earlier in the same year, but was not recognized as such. It was also independently discovered a few weeks later by another team of astronomers working with Effelsberg 100-m Radio Telescope.
After the discovery Dwingeloo 1 was classified as a barred spiral galaxy. The distance to it was found to be approximately 3 Mpc(Megaparsecs). In its overall size and mass the galaxy is comparable to Triangulum Galaxy.
Dwingeloo 1 was eventually named after the 25m radio telescope in the Netherlands that was used in the DOGS survey and first detected it.
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Dwingeloo 2 was first detected at radio wavelengths from the 21 cm emission line of neutral atomic hydrogen (known to astronomers as HI) in the course of follow-up observations after the discovery of Dwingeloo 1.
Dwingeloo 2 is a small irregular galaxy discovered in 1996 and located about 10 million light-years away from the Earth. Its discovery was a result of Dwingeloo Obscured Galaxy Survey (DOGS) of the Zone of Avoidance. Dwingeloo 2 is a companion galaxy of Dwingeloo 1.
Dwingeloo 2 was first detected at radio wavelengths from the 21 cm emission line of neutral atomic hydrogen (known to astronomers as HI) in the course of follow-up observations after the discovery of Dwingeloo 1. Dwingeloo 2 is thought to be a member of the IC 342/Maffei Group, a galaxy group adjacent to the Local Group. The galaxy recedes from the Milky Way at the speed of about 241 km/s.
The visible radius of Dwingeloo 2 is approximately 2', which at the distance of 3 Mpc corresponds to about 2 kpc. Dwingeloo 2 has a well defined rotating HI disk inclined at approximately 69° with respect to observer. The distribution of the neutral hydrogen in Dwingeloo 2 is quite irregular, and it is detected as far as 3.2 kpc from the center of the galaxy. The total mass of the galaxy within this radius is estimated at 2.3 billion Solar masses, while the mass of the neutral hydrogen is estimated at about 100 million Solar masses. The total mass of the galaxy is about five times less than that of Dwingeloo 1.
The irregular structure of Dwingeloo 2 is likely related to its interaction with the much larger nearby galaxy Dwingeloo 1, which lies at a distance of only 24 kpc from Dwingeloo 2.
Website of the Extraterrestrial Location: [Web Link]
Website of location on Earth: [Web Link]
Celestial Body: Galaxy
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