Pair of colliding spiral galaxies in the constellation Canis Major
NGC 2207 andIC 2163 are a pair ofcolliding spiral galaxies about 80 millionlight-years away[ 2] constellation Canis Major . NGC 2207 was discovered by British astronomerJohn Herschel on 24 January 1835,[ 3] Herbert Howe on 11 February 1898.[ 4]
MIRI image of NGC 2207 and IC 2163, taken by theJames Webb Space Telescope The larger spiral, NGC 2207, is classified as anintermediate spiral galaxy exhibiting a weak inner ring structure around the central bar. The smaller companion spiral, IC 2163, is classified as abarred spiral galaxy that also exhibits a weak inner ring and an elongated spiral arm that is likely being stretched bytidal forces with the larger companion. Both galaxies contain a vast amount of dust and gas, and are beginning to exhibit enhanced rates ofstar formation , as seen in infrared images.
NGC 2207 is in the process of colliding and merging with IC 2163. But unlike theAntennae or theMice Galaxies , they are still two separate spiral galaxies. They are only in the first step of colliding and merging, with NGC 2207 being in the process oftidally stripping IC 2163. Soon they will collide, probably looking a bit more like theMice Galaxies . In about a billion years' time they are expected to merge and become anelliptical galaxy or perhaps adisk galaxy .[ 5]
Fivesupernovae have been observed in NGC 2207:
One supernova has been observed in IC 2163:
SN 2018lab (type II, mag. 18.493) was discovered by theDistance Less Than 40 Mpc Survey (DLT40) on 29 December 2018.[ 19] [ 20] In addition, one supernova has been observed on the outskirts of the group:
SN 2010jp (type IIn , mag. 17.2) was discovered by The CHilean Automatic Supernova sEarch (CHASE) on 11 November 2010.[ 21] [ 22] ^a b c d e f g h "NASA/IPAC Extragalactic Database" .Results for NGC 2207 / IC 2163 . Retrieved2006-11-25 .^a b "Distance Results for NGC 2207" .NASA/IPAC Extragalactic Database . Retrieved2010-05-22 .^ Seligman, Courtney."New General Catalogue Objects: NGC 2207" .Celestial Atlas . Retrieved29 December 2024 . ^ Seligman, Courtney."Index Catalogue Objects: IC 2163" .Celestial Atlas . Retrieved29 December 2024 . ^ Ueda, Junko; Iono, Daisuke; et al. (12 August 2014). "Cold molecular gas in merger remnants. I. Formation of molecular gas disks".The Astrophysical Journal Supplement Series 214 (1): 1.arXiv :1407.6873 Bibcode :2014ApJS..214....1U .doi :10.1088/0067-0049/214/1/1 .ISSN 1538-4365 .S2CID 716993 . ^ Dunlap, J. R.; Dunlap, Y. (1975)."Supernova in NGC 2207" .International Astronomical Union Circular (2738): 1.Bibcode :1975IAUC.2738....1D . ^ Kirshner, R. P.; Arp, H. C.; Dunlap, J. R. (June 1976)."Observations of supernovae - 1975a in NGC 2207 and 1975b in the Perseus cluster" .The Astrophysical Journal 207 (1): 44.Bibcode :1976ApJ...207...44K .doi :10.1086/154465 ISSN 0004-637X . ^ "SN 1975A" .Transient Name Server .IAU . Retrieved29 December 2024 .^ Modjaz, M.; Li, W. D. (1999)."Supernova 1999ec in NGC 2207" .International Astronomical Union Circular (7268): 3.Bibcode :1999IAUC.7268....3M . ^ Jha, S.; Garnavich, P.; Challis, P.; Kirshner, R.; et al. (October 1999). "Supernova 1999ec in NGC 2207".International Astronomical Union Circular Bibcode :1999IAUC.7269....2J .ISSN 0081-0304 . ^ "SN 1999ec" .Transient Name Server .IAU . Retrieved29 December 2024 .^ Graham, J.; Li, W.; Puckett, T.; Toth, D.; Qiu, Y. L. (2003)."Supernovae 2003E, 2003F, 2003G, 2003H" .International Astronomical Union Circular (8045): 1.Bibcode :2003IAUC.8045....1G . ^ van den Bergh, Sidney; Li, Weidong; Filippenko, Alexei V. (November 2003). "Classifications of the Host Galaxies of Supernovae, Set II".Publications of the Astronomical Society of the Pacific 115 (813):1280– 1288.arXiv :astro-ph/0308195 Bibcode :2003PASP..115.1280V .doi :10.1086/379106 .ISSN 0004-6280 .S2CID 2015979 . ^ "SN 2003H" .Transient Name Server .IAU . Retrieved29 December 2024 .^ Klotz, Alain; Conseil, E.; et al. (March 2013). "Supernova 2013ai in NGC 2207 = Psn J06161835-2122329".Central Bureau Electronic Telegrams Bibcode :2013CBET.3431....1K . ^ "SN 2013ai" .Transient Name Server .IAU . Retrieved29 December 2024 .^ "AT 2019eez" .Transient Name Server .IAU . Retrieved29 December 2024 .^ Strader, J.; Chomiuk, L.; Dage, K.; Prieto, J. L.; Stanek, K. Z. (2019)."Spectroscopic classification of ASASSN-19kz as a young Type II supernova in NGC 2207" .The Astronomer's Telegram .12706 : 1.Bibcode :2019ATel12706....1S . ^ "Transient Name Server" .Entry for SN 2018lab . Retrieved10 August 2024 .^ 2018lab in IC 2136 (David Bishop)^ Maza, J.; Hamuy, M.; Antezana, R.; Gonzalez, L.; Cartier, R.; Forster, F.; Silva, S.; Carrasco, F.; Pignata, G.; Cifuentes, M.; Conuel, B.; Folatelli, G.; Reichart, D.; Ivarsen, K.; Haislip, J.; Crain, A.; Foster, D.; Nysewander, M.; Lacluyze, A. (2010)."Supernovae 2010jp and 2010jq" .Central Bureau Electronic Telegrams (2544): 1.Bibcode :2010CBET.2544....1M . ^ "SN 2010jp" .Transient Name Server .IAU . Retrieved29 December 2024 .Wikimedia Commons has media related to
NGC 2207 .
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IC 2163 .
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