NGC 376

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NGC 376
NGC376 - HST - Potw2249a.jpg
Hubble Space Telescope image of NGC 376
Observation data (J2000 epoch)
Right ascension 01h 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 designations ESO 029-SC 029. [4]
Associations
Constellation Tucana
See also: Open cluster, List of open clusters

NGC 376 is a young [2] open cluster of stars in the southern constellation of Tucana. It was discovered on September 2, 1826, by Scottish astronomer James 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 the Small Magellanic Cloud (SMC), a nearby dwarf 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 in dynamic equilibrium. The cluster is about 28 [3]  million years old and contains ~3,400 times the mass of the Sun. [2] It has a core radius of 7.6 ± 0.3 ly and a tidal radius of 19.2 ± 0.7 ly. [3]

References

  1. 1 2 3 Rafelski, 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. 1 2 3 4 Perren, 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. 1 2 3 Sabbi, 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 . Retrieved March 29, 2020.
  5. "New General Catalog Objects: NGC 350 - 399". Cseligman. Retrieved November 30, 2016.