Astronomy:IC 2006
| IC 2006 | |
|---|---|
 IC 2006, imaged by the Hubble Space Telescope | |
| Observation data (J2000 epoch) | |
| Constellation | Eridanus |
| Right ascension | 03h 54m 28.427s[1] |
| Declination | −35° 58′ 01.75″[1] |
| Redshift | 0.004610[2] |
| Helio radial velocity | 1382[2] |
| Distance | 65.36 ± 0.46 Mly (20.04 ± 0.14 Mpc)[3] |
| Group or cluster | Fornax Cluster[3] |
| Apparent magnitude (B) | 12.39[4] |
| Characteristics | |
| Type | E1[5] |
| Size | 35 000 light-years in diameter |
| Apparent size (V) | 2.1′ × 1.8′[2] |
| Notable features | Early-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 United States 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
- ↑ 1.0 1.1 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W. et al. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal 131 (2): 1163–1183. doi:10.1086/498708. ISSN 0004-6256. Bibcode: 2006AJ....131.1163S.
- ↑ 2.0 2.1 2.2 2.3 2.4 "NED results for object IC 2006". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=IC+2006&extend=no&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES.
- ↑ 3.0 3.1 3.2 Tully, R. Brent (2013). "Cosmicflows-2: The Data". The Astronomical Journal 146 (4): 86. doi:10.1088/0004-6256/146/4/86. Bibcode: 2013AJ....146...86T. Distances accessed using SIMBAD.
- ↑ "IC 2006". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=IC+2006.
- ↑ 5.0 5.1 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. doi:10.1093/mnras/stv466. Bibcode: 2015MNRAS.449.3021T.
- ↑ Seligman, Courtney. "Index Catalog objects: IC 2000 - 2049". http://cseligman.com/text/atlas/ic20.htm#2006.
- ↑ "Colossal Ancient Galaxies Die from the Inside Out". 2015. http://www.space.com/29123-ancient-galaxies-die-inside-out.html.
- ↑ 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. doi:10.1051/0004-6361/201015908. Bibcode: 2011A&A...528A..10P.
- ↑ "Elliptical galaxy IC 2006 | ESA/Hubble". 2015. https://www.spacetelescope.org/images/heic1508a/.
- ↑ 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.
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