Grus II dwarf galaxy

Database links to Grus II

Galaxy Grus II dwarf galaxy
AladinLite
Constellation	crane
Position equinox :  J2000.0 , epoch : J2000.0
Right ascension	22 h 04 m 04.8 s
declination	-46 ° 26 ′ 24.0 ″
Appearance
Morphological type	dSph
Brightness  (visual)	(14.72 ± 0.22) mag
Physical data
Affiliation	Local group
distance	(173,000 ± 16,000) ly / (53,000 ± 5,000) pc
Absolute brightness	(−3.9 ± 0.2) mag
history
discovery	Dark Energy Survey
Discovery date	2015
Catalog names
Gru II dSph • DES J2204−4626

The Grus II dwarf galaxy , also Grus II or Grus 2 for short , is a dwarf galaxy of the type dSph discovered in 2015 in the constellation Crane in the Local Group and one of the satellite galaxies of the Milky Way .

properties

Gru II dSph has a half-light radius of ′ , which corresponds to a size of (93 ± 14) pc at a distance of about 53 kpc  . Both a clear red giant branch and some members of a blue horizontal branch can be seen in the color-brightness diagram . The distance to the Large Magellanic Cloud is 46 kpc and the center of the Milky Way is 49 kpc. At 33 kpc, it is a little closer to the Small Magellanic Cloud and at just 18 kpc, surprisingly close to dwarf galaxies in the toucan. Even if a current interaction with these systems can be ruled out at the moment, an earlier interaction with these systems cannot be ruled out. ${\displaystyle r_{h}=6,0_{-0,5}^{+0,9}}$ 

additional

• List of galaxies in the local group

Web links

Commons : Constellation Crane  - Collection of images, videos and audio files

• EIGHT ULTRA-FAINT GALAXY CANDIDATES DISCOVERED IN YEAR TWO OF THE DARK ENERGY SURVEY at: iop.org

Individual evidence

1. ↑ ^{a b} A. Drlica-Wagner: Eight ultra-faint galaxy candidates discovered in Year Two of the Dark Energy Survey . In: The Astrophysical Journal . 813, No. 2, November 4, 2015, p. 109. doi : 10.1088 / 0004-637X / 813/2/109 .