NGC 1291

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NGC 1291
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NGC 1291 imaged by the Dark Energy Camera (DECam) on the Víctor M. Blanco Telescope at Cerro Tololo Inter-American Observatory, using data from the Dark Energy Survey (2013–2019).[1]
Observation data (J2000 epoch)
ConstellationEridanus
Right ascensionTemplate:RA[2]
DeclinationTemplate:DEC[2]
Redshift0.002799 (839 ± 2 km/s)[2]
Distance33 Mly
Apparent magnitude (V)9.39[2]
Absolute magnitude (V)−21.05[3]
Characteristics
Type(R_1)SB(l)0/a[2]
Apparent size (V)9′.8 × 8′.1[2]
Notable featuresinner bar and outer ring structure
Other designations
PGC 012209,[2]

NGC 1291, also known as NGC 1269,[4] is a ring galaxy with an unusual inner bar and outer ring structure located about 33 million light-years away in the constellation Eridanus.[5] It was discovered by James Dunlop in 1826 and subsequently entered into the New General Catalogue as NGC 1291 by Johan Ludvig Emil Dreyer. John Herschel then observed the same object in 1836 and entered it into the catalog as NGC 1269 without realizing that it was a duplicate.[4] This galaxy was cited as an example of a "transitional galaxy" by NASA's Galaxy Evolution Explorer team in 2007.[6]

Properties

NGC 1291 faces towards the Solar System nearly face-on. It has a prominent bulge, and is forming stars in its disk, albeit slowly, being a lenticular galaxy.[3]

Like other early-type galaxies, NGC 1291 has a population of old globular clusters. About 65% of them belong to the "blue" population that is more metal-poor, while the rest are "red" and more metal-rich.[3]

The concentric inner and outer disk structures visible in the DECam image are thought to be the result of a past merger with a gas-rich galaxy, with the inner disk further shaped by density waves radiating outward from the galactic center. Data for the image came from the Dark Energy Survey archive (2013–2019), obtained with the Dark Energy Camera (DECam) on the Víctor M. Blanco Telescope at Cerro Tololo Inter-American Observatory.[1]

References

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  1. ^ a b Page Module:Citation/CS1/styles.css has no content."The Cosmic Steering Wheel NGC 1269". NOIRLab. 2026. Retrieved March 2, 2026.
  2. ^ a b c d e f g Page Module:Citation/CS1/styles.css has no content."NASA/IPAC Extragalactic Database". Results for NGC 1291. Retrieved October 30, 2009.
  3. ^ a b c Page Module:Citation/CS1/styles.css has no content.Hixenbaugh, Kyle; Chandar, Rupali; Mok, Angus (2022). "The Ancient Globular Clusters of NGC 1291". The Astronomical Journal. 163 (6): 271. arXiv:2205.14047. Bibcode:2022AJ....163..271H. doi:10.3847/1538-3881/ac680d. S2CID 248853311.
  4. ^ a b Page Module:Citation/CS1/styles.css has no content."NGC 1291". Capella Observatory. 2005. Retrieved April 1, 2012.
  5. ^ a b Page Module:Citation/CS1/styles.css has no content.Dunbar, Brian (November 22, 2007). Watanabe, Susan (ed.). "NGC 1291". NASA. Archived from the original on March 5, 2016. Retrieved April 1, 2012.
  6. ^ Page Module:Citation/CS1/styles.css has no content.Dunbar, Brian (November 22, 2007). Watanabe, Susan (ed.). "Portrait of a Galaxy's Life". NASA. Archived from the original on April 6, 2012. Retrieved April 1, 2012.

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