Cannabaceae

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IC 2006
IC 2006, imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationEridanus
Right ascension03h 54m 28.427s[1]
Declination−35° 58′ 01.75″[1]
Redshift0.004610[2]
Heliocentric radial velocity1382[2]
Distance65.36 ± 0.46 Mly (20.04 ± 0.14 Mpc)[3]
Group or clusterFornax Cluster[3]
Apparent magnitude (B)12.39[4]
Characteristics
TypeE1[5]
Size35 000 light-years in diameter
Apparent size (V)2.1′ × 1.8′[2]
Notable featuresEarly-type galaxy
Other designations
AM 0532-360, MGC-06-09-037, PGC 14077

IC 2006 is an elliptical galaxy in the constellation Eridanus. The galaxy was discovered on 3 October 1897 by the American astronomer Lewis A. Swift.[6] It is estimated to be around 60 to 70 million light years (20 megaparsecs) away,[2] in the Fornax Cluster.[3] The galaxy is one of the smaller in the Fornax cluster, with a diameter of only 35 000 light-years.

IC 2006 is an early-type galaxy with a Hubble classification of E1,[5] but has also been listed as a lenticular galaxy with a morphological type of SA0−.[2] Despite their name, early-type galaxies are much older than spiral galaxies, and mostly comprise old, red-colored stars. Very little star formation occurs in these galaxies; the lack of star formation in elliptical galaxies appears to start at the center and then slowly propagates outward.[7] Its age is estimated to be 8.1 ± 1.7 billion years.[8]

An image taken by the Hubble Space Telescope in 2015 shows a characteristically smooth profile, with no spiral arms.[9] However, IC 2006 has a ring surrounding it. The ring appears to rotate in a direction opposite to the rest of the body, but this may be explained by a polar ring with an elliptical shape.[10]

References[edit]

  1. ^ a b Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708. ISSN 0004-6256. S2CID 18913331.
  2. ^ a b c d e "NED results for object IC 2006". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 5 March 2017.
  3. ^ a b c Tully, R. Brent; et al. (2013). "Cosmicflows-2: The Data". The Astronomical Journal. 146 (4): 86. arXiv:1307.7213. Bibcode:2013AJ....146...86T. doi:10.1088/0004-6256/146/4/86. S2CID 118494842. Distances accessed using SIMBAD.
  4. ^ "IC 2006". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 March 2017.
  5. ^ a b Trinchieri, G.; Rampazzo, R.; Mazzei, P.; Marino, A.; Wolter, A. (2015). "Investigating early-type galaxy evolution with a multiwavelength approach - I. X-ray properties of 12 galaxies observed with Swift and XMM-Newton". Monthly Notices of the Royal Astronomical Society. 449 (3): 3021–3042. Bibcode:2015MNRAS.449.3021T. doi:10.1093/mnras/stv466.
  6. ^ Seligman, Courtney. "Index Catalog objects: IC 2000 - 2049". cseligman.com. Retrieved 5 March 2017.
  7. ^ Howell, Elizabeth (2015). "Colossal Ancient Galaxies Die from the Inside Out". space.com. Retrieved 5 March 2017.
  8. ^ Panuzzo, P.; Rampazzo, R.; Bressan, A.; Vega, O.; Annibali, F.; Buson, L. M.; Clemens, M. S.; Zeilinger, W. W. (2011). "Nearby early-type galaxies with ionized gas. VI. The Spitzer-IRS view. Basic data set analysis and empirical spectral classification". Astronomy & Astrophysics. 528: A10. arXiv:1010.2323. Bibcode:2011A&A...528A..10P. doi:10.1051/0004-6361/201015908. S2CID 117915425.
  9. ^ "Elliptical galaxy IC 2006 | ESA/Hubble". www.spacetelescope.org. 2015. Retrieved 5 March 2017.
  10. ^ Bertsik, P. P.; Kolesnik, I. G. (1992). "IC 2006 - an elliptical galaxy with a polar ring". Kinematika I Fizika Nebesnykh Tel. 8 (4): 92–96. Bibcode:1992KFNT....8...92B.

External links[edit]

  • Media related to IC 2006 at Wikimedia Commons


source: https://en.wikipedia.org/wiki/IC_2006

One thought on “Cannabaceae”

  1. Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
    View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction

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