NGC 1396

NGC 1396
DSS image of NGC 1396. NGC 1399 can be seen to the left of NGC 1396
Observation data (J2000 epoch)
ConstellationFornax (constellation)
Right ascension03h 38m 06.5s[1]
Declination−35° 26′ 24″[1]
Redshift0.002695[1]
Heliocentric radial velocity808 km/s[1]
Distance62.05 Mly (19.025 Mpc)[1]
Group or clusterFornax Cluster
Apparent magnitude (V)14.82[1]
Absolute magnitude (V)−16.3[2]
Characteristics
Typed:E6,N[2]
Mass5.6×108 (Stellar mass)/1×109 (Total Mass)[3] M☉
Size~23,900 ly (7.33 kpc) (estimated)[1]
Apparent size (V)1.0 x 0.9[1]
Other designations
ESO 358- ? 041, FCC 202, PGC 013398[1]

NGC 1396 is a dwarf elliptical galaxy[4] located 61 million light years away[5] in the constellation of Fornax. The galaxy was discovered by astronomer Julius Schmidt on January 19, 1865,[6] and is a member of the Fornax Cluster.[7] Despite the fact that the galaxy PGC 13398 is most commonly identified as NGC 1396, there is uncertainty in its identification.[8][9][10]

NGC 1396 is a satellite galaxy of NGC 1399.[11]

232 known globular clusters have been observed surrounding NGC 1396,[2] along with a central nuclear star cluster with an estimated mass of 9.6 × 106 M☉.[12]

NGC 1396 has a metallicity of [Fe/H]∼ -0.4, with unusually overabundant values of [Ca/Fe] ∼+ 0.1, and underabundant sodium, with [Na/Fe] values around -0.1, while [Mg/Fe] is overabundant throughout the galaxy, increasing at a greater distance from the center of the galaxy. These abundance ratios compared with galaxies in the Local Group, show that the chemical enrichment history of the interstellar medium of NGC 1396 is similar to the galactic disc of the Milky Way. This implies that NGC 1396 originated as a progenitor galaxy the size of the Large Magellanic Cloud that lost its gas as it fell though the Fornax Cluster.[4]

See also

References

  1. ^ a b c d e f g h i "NASA/IPAC Extragalactic Database". Results for NGC 1396. Retrieved 2024-07-05.
  2. ^ a b c Lee, Sang-Yoon; Chung, Chul; Yoon, Suk-Jin (2019-01-01). "Nonlinear Color-Metallicity Relations of Globular Clusters. VIII. Reproducing Color Distributions of Individual Globular Cluster Systems in the Virgo and Fornax Galaxy Clusters". The Astrophysical Journal Supplement Series. 240 (1): 2. arXiv:1811.00018. Bibcode:2019ApJS..240....2L. doi:10.3847/1538-4365/aaecd4. ISSN 0067-0049.
  3. ^ Eftekhari, F. Sara; Peletier, Reynier F.; Scott, Nicholas; Mieske, Steffen; Bland-Hawthorn, Joss; Bryant, Julia J.; Cantiello, Michele; Croom, Scott M.; Drinkwater, Michael J.; Falcón-Barroso, Jésus; Hilker, Michael; Iodice, Enrichetta; Napolitano, Nicola R.; Spavone, Marilena; Valentijn, Edwin A. (2022-12-01). "The SAMI-Fornax Dwarfs Survey - II. The Stellar Mass Fundamental Plane and the dark matter fraction of dwarf galaxies". Monthly Notices of the Royal Astronomical Society. 517 (4): 4714–4735. arXiv:2209.05525. Bibcode:2022MNRAS.517.4714E. doi:10.1093/mnras/stac2606. ISSN 0035-8711.
  4. ^ a b Mentz, J. J.; La Barbera, F.; Peletier, R. F.; Falcón-Barroso, J.; Lisker, T.; van de Ven, G.; Loubser, S. I.; Hilker, M.; Sánchez-Janssen, R.; Napolitano, N.; Cantiello, M.; Capaccioli, M.; Norris, M.; Paolillo, M.; Smith, R. (2016-12-01). "Abundance ratios and IMF slopes in the dwarf elliptical galaxy NGC 1396 with MUSE". Monthly Notices of the Royal Astronomical Society. 463 (3): 2819–2838. arXiv:1608.07042. Bibcode:2016MNRAS.463.2819M. doi:10.1093/mnras/stw2129. ISSN 0035-8711.
  5. ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-07-06.
  6. ^ "New General Catalog Objects: NGC 1350 - 1399". cseligman.com. Retrieved 2024-07-03.
  7. ^ Ferguson, Henry C. (1989-08-01). "Population Studies in Groups and Clusters of Galaxies. II. A Catalog of Galaxies in the Central 3.5 Degrees of the Fornax Cluster". The Astronomical Journal. 98: 367. Bibcode:1989AJ.....98..367F. doi:10.1086/115152. ISSN 0004-6256.
  8. ^ "New General Catalog Objects: NGC 1350 - 1399". cseligman.com. Retrieved 2024-07-06.
  9. ^ Gottlieb, Steve. "Astronomy-Mall". Astronomy-Mall. Retrieved 2024-07-05.
  10. ^ "Notes on the NGC objects, particularly those missing, misidentified, or otherwise unusual (ngcnotes.all)". Historically-aware NGC/IC Positions and Notes. Retrieved 2024-07-05.
  11. ^ Liu, Yiqing; Peng, Eric W.; Jordán, Andrés; Blakeslee, John P.; Côté, Patrick; Ferrarese, Laura; Puzia, Thomas H. (2019-04-01). "The ACS Fornax Cluster Survey. III. Globular Cluster Specific Frequencies of Early-type Galaxies". The Astrophysical Journal. 875 (2): 156. arXiv:1904.06909. Bibcode:2019ApJ...875..156L. doi:10.3847/1538-4357/ab12d9. ISSN 0004-637X.
  12. ^ Johnston, Evelyn J.; Puzia, Thomas H.; D'Ago, Giuseppe; Eigenthaler, Paul; Galaz, Gaspar; Häußler, Boris; Mora, Marcelo D.; Ordenes-Briceño, Yasna; Rong, Yu; Spengler, Chelsea; Vogt, Frédéric; Côté, Patrick; Grebel, Eva K.; Hilker, Michael; Mieske, Steffen (2020-06-01). "The Next Generation Fornax Survey (NGFS): VII. A MUSE view of the nuclear star clusters in Fornax dwarf galaxies". Monthly Notices of the Royal Astronomical Society. 495 (2): 2247–2264. arXiv:2005.01532. Bibcode:2020MNRAS.495.2247J. doi:10.1093/mnras/staa1261. ISSN 0035-8711.

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