Carina dwarf galaxy

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Galaxy
Carina dwarf galaxy
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Carina dwarf galaxy imaged with the Wide Field Imager on the MPG / ESO 2.2 m telescope of the La Silla Observatory and the Victor M. Blanco 4 meter telescope of the Cerro Tololo Inter-American Observatory [ 1]
Carina dwarf galaxy imaged with the Wide Field Imager on the MPG / ESO 2.2 m telescope of the La Silla Observatory and the Victor M. Blanco 4 meter telescope of the Cerro Tololo Inter-American Observatory
AladinLite
Constellation Keel of the ship
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 06 h 41 m 36.7 s
declination -50 ° 57 ′ 58 ″
Appearance
Morphological type dE3 / dSph  
Brightness  (B-band) 11.3 mag
Angular expansion 23.4 ′ × 15.5 ′
Physical data
Affiliation Local group  
Radial velocity (230 ± 60) km / s  
distance (326,000 ± 32,000) ly /
(100,000 ± 10,000) pc
history
discovery Cannon et al
Discovery date 1977
Catalog names
PGC  19441 • ESO  206-G20 •

The Carina dwarf galaxy , also known as ESO 206-G20 or PGC 19441 , is an early morphological type dwarf galaxy in the constellation Kiel des Schiff ( Latin Carina ). In the year 1977 she was awarded the UK Schmidt Telescope at Siding Spring Observatory al of the research group Cannon et. discovered.  

properties

As one of the satellites of the Milky Way , the Carina dwarf moves away at a speed of around 230  km / s .

The galaxy seems to have formed several billion years after the other satellite galaxies in the Milky Way : its oldest stars are relatively young, less than 7 billion years old. This makes it a relatively youthful galaxy compared to the Milky Way, which at 13.6 billion years is almost as old as the universe itself.

Despite this somewhat shorter evolution, the Carina dwarf galaxy probably has a complex history of star formation ; at least three distinguishable star formation phases could be identified for them.

Because of its proximity to the Milky Way, it is so violently deformed by tidal forces that it pulls a tail of gas , dust and stars behind it.

See also

Web links

Commons : Constellation Kiel des Schiff  - Collection of images, videos and audio files

Individual evidence

  1. ^ Hiding in Plain Sight - the elusive Carina Dwarf Galaxy. In: ESO Picture of the Week. European Southern Observatory, accessed June 28, 2011 .
  2. ↑ a b c d NASA / IPAC Extragalactic Database
  3. ↑ ID Karachentsev, VE Karachentseva, WK Hutch Meier, DI Makarov: A Catalog of Neighboring Galaxies . In: Astronomical Journal . 127, No. 4, 2004, pp. 2031-2068. bibcode : 2004AJ .... 127.2031K . doi : 10.1086 / 382905 .
  4. ↑ Karachentsev, ID; Kashibadze, OG: Masses of the local group and of the M81 group estimated from distortions in the local velocity field . In: Astrophysics . 49, No. 1, 2006, pp. 3-18. bibcode : 2006Ap ..... 49 .... 3K . doi : 10.1007 / s10511-006-0002-6 .
  5. ↑ a b Carina Dwarf. Retrieved October 13, 2007 .
  6. ↑ RD Cannon, TG Hawarden, SB Tritton, Hawarden, Tritton: A new Sculptor-type dwarf elliptical galaxy in Carina . In: Monthly Notices of the Royal Astronomical Society . 180, 1977, pp. 81-82. bibcode : 1977MNRAS.180P..81C .
  7. ↑ Carina Dwarf. Retrieved October 13, 2007 .
  8. ↑ RD Cannon, TG Hawarden, SB Tritton, Hawarden, Tritton: A new Sculptor-type dwarf elliptical galaxy in Carina . In: Monthly Notices of the Royal Astronomical Society . 180, 1977, pp. 81-82. bibcode : 1977MNRAS.180P..81C .
  9. ^ The Satellite Galaxies
  10. ↑ Dennise Hurley-Keller, Mario Mateo and James Nemec: The Star Formation History of the Carina Dwarf Galaxy . In: The Astronomical Journal . 115, 1998, p. 1840. arxiv : astro-ph / 9804058 . bibcode : 1998AJ .... 115.1840H . doi : 10.1086 / 300326 .
  11. ↑ JR Kuhn, Horace A Smith and Suzanne L Hawley: Tidal Disruption and Tails from the Carina Dwarf Spheroidal Galaxy . In: The Astrophysical Journal . 469, 1996, pp. L93-L96. bibcode : 1996ApJ ... 469L..93K . doi : 10.1086 / 310270 .