NGC 411 explained

NGC 411
Credit:NASA/ESA
Epoch:J2000
Constellation:Tucana
Dist Ly:55000+/-[1]
Appmag V:12.1[2]
Size V:2.1 × 1.9
Age:1.5 billion years[3]
Names:Kron 60, Lindsay 82, ESO 51-19

NGC 411 is a globular cluster located approximately 55000pc from Earth in the constellation Tucana. It was discovered in 1826 by James Dunlop. It was described by Dreyer as "extremely faint, pretty large, round, gradually very little brighter middle".[4] At a distance of about 180,000 light years (55,000 parsecs), it is located within the Small Magellanic Cloud.[1] It has a mass of about, and a luminosity of about .[5]

NGC 411 was imaged by the Hubble Space Telescope in 2013, showing an abundance of stars ranging from blue to red.[6] In particular, this seemed to suggest that the cluster was much younger than previously thought: its age has been estimated at 1.5 billion years old, relatively young in astronomical terms.[3] [6] However, these results have been challenged by another group who state that these young stars may actually just be background stars, and are thus physically unrelated.[7]

Notes and References

  1. Web site: NASA/IPAC Extragalactic Database. Results for NGC 0411. 2 September 2016.
  2. NGC 411. 6 February 2017.
  3. The tight subgiant branch of the intermediate-age star cluster NGC 411 implies a single-aged stellar population. Li, C.. de Grijs, R.. Bastian, N.. Deng, L.. Niederhofer, F.. Zhang, C.. Monthly Notices of the Royal Astronomical Society. 461. 3. 3212–3221. 2016. 2016MNRAS.461.3212L. 10.1093/mnras/stw1491. free . 1606.05394.
  4. Web site: New General Catalog Objects: NGC 400 - 449. Cseligman. 6 February 2017.
  5. 10.1093/mnras/stab1065. Dynamical masses and mass-to-light ratios of resolved massive star clusters – II. Results for 26 star clusters in the Magellanic Clouds. 2021. Song. Ying-Yi. Mateo. Mario. Bailey. John I.. Walker. Matthew G.. Roederer. Ian U.. Olszewski. Edward W.. Reiter. Megan. Kremin. Anthony. Monthly Notices of the Royal Astronomical Society. 504. 3. 4160–4191. free . 2104.06882.
  6. News: Hubble Finds Appearances can be Deceptive. www.nasa.gov. 2013.
  7. No evidence for younger stellar generations within the intermediate-age massive clusters NGC 1783, NGC 1806 and NGC 411. Cabrera-Ziri, I.. etal. Monthly Notices of the Royal Astronomical Society. 459. 4. 4218–4223. 2016. 2016MNRAS.459.4218C. 10.1093/mnras/stw966. free . 1604.06106.

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