Andromeda IX

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Galaxy
Andromeda IX
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Diagram of the local group with And IX
Diagram of the local group with And IX
AladinLite
Constellation Andromeda
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 00 h 52 m 53.0 s
declination + 43 ° 11 ′ 45 ″
Appearance
Morphological type dE, dSph  
Brightness  (visual) (16.17 ± 0.06) mag
Surface brightness 26.8 mag / arcmin²
Physical data
Radial velocity −216 km / s  
distance (2,500,000 ± 80,000) ly /
(766,000 ± 25,000) pc
Absolute brightness −8.26 ± 0.07 mag
history
discovery Zucker et al.
Discovery date 2004
Catalog names
And IX
Satellite galaxy of M31

Andromeda IX is a spheroidal dwarf galaxy (dSph) in the constellation of Andromeda . It is a satellite galaxy of M31 and was discovered in 2004 by the research group Zucker et al. on recordings of the screening of the Sloan Digital Sky Survey discovered. She belongs to the Local Group and therein to the Andromeda Subgroup . At the time of its discovery it was the galaxy with the lowest surface brightness µ V = 26.8 mag / arcsec 2 and the lowest absolute brightness at all.

Andromeda IX was discovered on a scan along the main axis of the Andromeda Nebula (M31), which was carried out in October 2002. The distance is estimated in McConnachie et al. from 2005 equated with that of its mother galaxy.

additional

Individual evidence

  1. ↑ a b c d e NASA / IPAC Extragalactic Database . In: Results for Andromeda IX . Retrieved November 29, 2006.
  2. ↑ a b c McConnachie, AW; Irwin, MJ; Ferguson, AMN; Ibata, RA; Lewis, GF; Tanvir, N .: Distances and metallicities for 17 Local Group galaxies . In: Monthly Notices of the Royal Astronomical Society . 356, No. 4, 2005, pp. 979-997. arxiv : astro-ph / 0410489 . bibcode : 2005MNRAS.356..979M . doi : 10.1111 / j.1365-2966.2004.08514.x .
  3. ↑ SIMBAD Astronomical Database . In: Results for Andromeda IX . Retrieved November 29, 2006.

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