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NGC 376

From Wikipedia, the free encyclopedia
Globular cluster in the constellation Tucana

NGC 376
Hubble Space Telescope image of NGC 376
Observation data (J2000epoch)
Right ascension01h 03m 50.21s[1]
Declination−72° 49′ 33.5″[1]
Apparent magnitude (V)10.90[1]
Physical characteristics
Mass3,400±400[2] M
Estimated age28±7[3] Myr
Other designationsESO 029-SC 029.[4]
Associations
ConstellationTucana
See also:Open cluster,List of open clusters

NGC 376 is a young[2]open cluster of stars in the southernconstellation ofTucana. It was discovered on September 2, 1826, by Scottish astronomerJames Dunlop.Dreyer, a Danish/British astronomer, described it as a "globular cluster, bright, small, round."[5] It is irregular in form, with a central spike.[2]

The cluster is located in the eastern extension of theSmall Magellanic Cloud (SMC), a nearbydwarf galaxy. It may have already lost 90% of its original mass and is in the process of dissolving into the SMC. As a result, it has achieved a relatively low concentration of stars and is no longer indynamic equilibrium. The cluster is about 28[3] million years old and contains ~3,400 times themass of the Sun.[2] It has a core radius of 7.6 ± 0.3 ly and atidal radius of 19.2 ± 0.7 ly.[3]

References

[edit]
  1. ^abcRafelski, Marc; Zaritsky, Dennis (June 2005). "The Star Clusters of the Small Magellanic Cloud: Age Distribution".The Astronomical Journal.129 (6):2701–2713.arXiv:astro-ph/0408186.Bibcode:2005AJ....129.2701R.doi:10.1086/424938.S2CID 4600017.
  2. ^abcdPerren, G. I.; et al. (June 2017). "Astrophysical properties of star clusters in the Magellanic Clouds homogeneously estimated by ASteCA".Astronomy & Astrophysics.602: 42.arXiv:1701.08640.Bibcode:2017A&A...602A..89P.doi:10.1051/0004-6361/201629520.S2CID 56284363. A89.
  3. ^abcSabbi, E.; et al. (September 2011). "Is the Young Star Cluster NGC 376 Dissolving in the Field of the Small Magellanic Cloud?".The Astrophysical Journal.739 (1): 10.arXiv:1106.5974.Bibcode:2011ApJ...739...15S.doi:10.1088/0004-637X/739/1/15.S2CID 115651242. 15.
  4. ^"NGC 376".SIMBAD.Centre de données astronomiques de Strasbourg. RetrievedMarch 29, 2020.
  5. ^"New General Catalog Objects: NGC 350 - 399". Cseligman. RetrievedNovember 30, 2016.

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