Sculptor Dwarf Galaxy

From the Science Archives, the open-project database of science information
Jump to navigation Jump to search
Sculptor Dwarf Elliptical Galaxy
Sculptor Dwarf Galaxy.jpg
Observation data (J2000 epoch)
ConstellationSculptor
Right ascension01h 00m 09.3s[1]
Declination−33° 42′ 33″[1]
Redshift110 ± 1 km/s[1]
Distance290 ± 30 kly (90 ± 10 kpc)[2][3]
Apparent magnitude (V)10.1[1]
Characteristics
TypeE[1]
Apparent size (V)39′.8 × 30′.9[1]
Other designations
Sculptor Dwarf Spheroidal,[1] PGC 3589,[1] MCG-06-03-015
See also: Galaxy, List of galaxies

The Sculptor Dwarf Galaxy (also known as Sculptor Dwarf Elliptical Galaxy or the Sculptor Dwarf Spheroidal Galaxy) is a dwarf spheroidal galaxy that is a satellite of the Milky Way. The galaxy lies within the constellation Sculptor. It was discovered in 1937 by American astronomer Harlow Shapley using the 24-inch Bruce refractor at Boyden Observatory.[4][5] The galaxy is located about 290,000 light-years away from the Solar System. The Sculptor Dwarf contains only 4 percent of the carbon and other heavy elements in our own galaxy, the Milky Way, making it similar to primitive galaxies seen at the edge of the universe.[6]

Metallicity[edit]

The metallicity of Sculptor dwarf appears to be broken up into two distinct groups, one with [Fe/H] = -2.3 and the other with [Fe/H] = -1.5.[7] Similar to many of the other Local Group galaxies, the older metal-poor segment appears more extended than the younger metal-rich segment.[8]

Measurements[edit]

Using both Hubble Telescope and Gaia observations 12 years apart, about 100 stars in the galaxy were mapped accurately, and 3D motions of about 10 of those stars enable trajectories to be mapped as well.[9]

Gallery[edit]

References[edit]

  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  2. I. D. Karachentsev; V. E. Karachentseva; W. K. Hutchmeier; D. I. Makarov (2004). "A Catalog of Neighboring Galaxies". Astronomical Journal 128 (4): 2031–2068. Bibcode 2004AJ....127.2031K. doi:10.1086/382905.
  3. Karachentsev, I. D.; Kashibadze, O. G. (2006). "Masses of the local group and of the M81 group estimated from distortions in the local velocity field". Astrophysics 49 (1): 3–18. Bibcode 2006Ap.....49....3K. doi:10.1007/s10511-006-0002-6.
  4. Shapley, H., (1938) Harvard Bull. 908.
  5. Shapley H (1938). "Two Stellar Systems of a New Kind". Nature 142 (3598): 715–6. Bibcode 1938Natur.142..715S. doi:10.1038/142715b0.
  6. Astronomers Detect Dust Around a Primitive Star, Shedding New Light on Universe’s Origins Newswise, Retrieved on January 19, 2008.
  7. S.R. Majewski (20 July 1999). "An Internal Second-Parameter Problem in the Sculptor Dwarf Spheroidal Galaxy". The Astrophysical Journal 520 (1). arXiv:astro-ph/9905238. Bibcode 1999ApJ...520L..33M. doi:10.1086/312133.
  8. van den Bergh, Sidney (April 2000). "Updated Information on the Local Group". The Publications of the Astronomical Society of the Pacific 112 (770): 529–536. arXiv:astro-ph/0001040. Bibcode 2000PASP..112..529V. doi:10.1086/316548
  9. Hubble and Gaia team up to measure 3D stellar motion with record-breaking precision
  10. Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  11. Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).


Add your comment
The Science Archives welcomes all comments. If you do not want to be anonymous, register or log in. It is free.


As a reminder, article comments are only for discussions on how to improve the article. Please direct other comments to a user's talk page. Please be formal and do not use excessive uppercase. Please be advised you may receive an automatic block if you break the article comments policy. For information regarding what is acceptable/not acceptable in article comments, please message Icons-flag-ru.png Joey (talk), Natalia (talk), Icons-flag-fr.png ynoss (talk), or Icons-flag-ca.png Daniel (older account/talk).


External links[edit]