NGC 1380 explained

NGC 1380
Upright:1.15
Epoch:J2000
Type:SA0 [1]
Dist Ly:60.1 ± 12.1 Mly (18.4 ± 3.7 Mpc)
Z:0.006261 ± 0.000040
H Radial V:1,877 ± 12 km/s
Appmag V:9.9
Size V:4.8 × 2.3
Constellation Name:Fornax
Names:ESO 358- G028, AM 0334-350, MCG -06-09-002, PGC 13318

NGC 1380 is a lenticular galaxy located in the constellation Fornax. It is located at a distance of circa 60 million light years from Earth, which, given its apparent dimensions, means that NGC 1380 is about 85,000 light years across. It was discovered by James Dunlop on September 2, 1826.[2] It is a member of the Fornax Cluster.

Supermassive black hole and nucleus

In the centre of NGC 1380 lies a supermassive black hole whose mass is estimated to be based on the velocity dispersion of the globular clusters of the galaxy.[3] The nucleus of NGC 1380 is a probable LINER, based on its narrow emission lines. No broad line region has been detected in NGC 1380. The nuclear spectrum appears reddened, maybe due to the presence of gas and dust around the nucleus, maybe a result of mergers. There appears to be a second element in the nucleus of the galaxy, maybe an HII region.[4] NGC 1380 features a gas disk which co-rotates with the stellar disk, suggesting an internal origin.[5] There is an HII region 1.8 arcseconds south of the nucleus and a diffuse H-alpha region, another HII region, observed 1.8 arcseconds north of the nucleus.[6] The X-ray emission from the galaxy as observed by ROSAT can be explained as thermal emission from a hot interstellar medium and no hard component was detected.[7]

Globular clusters

It is estimated that there are globular clusters in NGC 1380. There are two district populations of globular clusters, one red and one blue. The blue globular clusters have similar color and magnitude as the globular clusters in the halo of the Milky Way, but have a flatter surface density profile. The red globular clusters form the majority of the globular clusters of the galaxy. They have similar distribution to the stellar disk of NGC 1380 and have slightly higher metallicity than the globular clusters in the Milky Way, and are associated with the bulge of the galaxy.[8] Based on their size, there are three star cluster populations, the typical globular clusters, with effective radius under 3 kpc, the diffuse star clusters, with effective radius circa 5 kpc, and the faint fuzzy clusters, with effective radius over 8 kpc. The typical globular clusters are closer to the nucleus than the diffuse star clusters.[9]

Environment

NGC 1380 lies in the central part of the Fornax Cluster, 35 arcminutes northwest of the large elliptical galaxy NGC 1399. In the same field of view lie the galaxies NGC 1380A, NGC 1379, NGC 1381, NGC 1382, and NGC 1387. NGC 1380 lies 2 degrees north-northeast of χ2 Fornacis and because of its high surface brightness can be spotted with a five inch telescope even from bright suburban skies.[10]

One supernova has been detected in NGC 1380: SN 1992A, a type Ia supernova with peak magnitude of 12.8.[11]

Based on the properties of its inner stellar halo, it appears that NGC 1380 went through a massive galaxy merger event about 10 billion years ago. The now-consumed satellite galaxy contributed to the mass of NGC 1380, which is about one-fifth of its current mass.[12]

External links

Notes and References

  1. Web site: NASA/IPAC Extragalactic Database . Results for NGC 1380 . 2016-01-18 .
  2. Web site: Seligman . Courtney . NGC 1380 (= PGC 13419) . Celestial Atlas . 19 November 2018.
  3. Pota . Vincenzo . Graham . Alister W. . Forbes . Duncan A. . Romanowsky . Aaron J. . Brodie . Jean P. . Strader . Jay . The SLUGGS survey: probing the supermassive black hole connection with bulges and haloes using red and blue globular cluster systems . Monthly Notices of the Royal Astronomical Society . July 2013 . 433 . 1 . 235–242 . 10.1093/mnras/stt718. free . 2013MNRAS.433..235P . 1304.6723 . 35877048 .
  4. Ricci . T. V. . Steiner . J. E. . Menezes . R. B. . IFU spectroscopy of 10 early-type galactic nuclei – II. Nuclear emission line properties . Monthly Notices of the Royal Astronomical Society . May 2014 . 440 . 3 . 2442–2456 . 10.1093/mnras/stu442. free . 2014MNRAS.440.2442R . 1403.6846 . 119255795 .
  5. Ricci . T. V. . Steiner . J. E. . Menezes . R. B. . Integral field unit spectroscopy of 10 early-type galactic nuclei – I. Principal component analysis Tomography and nuclear activity . Monthly Notices of the Royal Astronomical Society . May 2014 . 440 . 3 . 2419–2441 . 10.1093/mnras/stu441. free . 2014MNRAS.440.2419R . 1403.6840 . 118598358 .
  6. Ricci . T. V. . Steiner . J. E. . Menezes . R. B. . IFU spectroscopy of 10 early-type galactic nuclei – III. Properties of the circumnuclear gas emission . Monthly Notices of the Royal Astronomical Society . 29 June 2015 . 451 . 4 . 3728–3758 . 10.1093/mnras/stv1156. free . 2015MNRAS.451.3728R . 1506.03459 . 118568205 .
  7. Schlegel . Eric M. . Petre . Robert . Loewenstein . Michael . ROSAT Observations of X-Ray–faint S0 Galaxies: NGC 1380 . The Astronomical Journal . February 1998 . 115 . 2 . 525–534 . 10.1086/300217. 1998AJ....115..525S . free .
  8. Kissler-Patig . M. . Richtler . T. . Storm . J. . della Valle . M. . Halo and bulge/disk globular clusters in the S0 galaxy NGC 1380. . Astronomy and Astrophysics . 1 November 1997 . 327 . 503–512 . 0004-6361 . 1997A&A...327..503K. astro-ph/9706303 .
  9. Chies-Santos . A. L. . Santiago . B. X. . Pastoriza . M. G. . High resolution imaging of the early-type galaxy NGC 1380: an insight into the nature of extended extragalactic star clusters . Astronomy & Astrophysics . 26 March 2007 . 467 . 3 . 1003–1009 . 10.1051/0004-6361:20066546. 2007A&A...467.1003C . astro-ph/0702715 . 17997095 .
  10. Book: O'Meara . Stephen James . Deep-Sky Companions: Southern Gems . 2013 . Cambridge University Press . 9781107015012 . 78–80. 2013dcsg.book.....O .
  11. http://www.cbat.eps.harvard.edu/lists/Supernovae.html List of Supernovae
  12. 10.1051/0004-6361/202243109. The Fornax3D project: Discovery of ancient massive merger events in the Fornax cluster galaxies NGC 1380 and NGC 1427. 2022. Zhu. Ling. Van De Ven. Glenn. Leaman. Ryan. Pillepich. Annalisa. Coccato. Lodovico. Ding. Yuchen. Falcón-Barroso. Jesús. Iodice. Enrichetta. Navarro. Ignacio Martin. Pinna. Francesca. Corsini. Enrico Maria. Gadotti. Dimitri A.. Fahrion. Katja. Lyubenova. Mariya. Mao. Shude. McDermid. Richard. Poci. Adriano. Sarzi. Marc. De Zeeuw. Tim. Astronomy & Astrophysics. 664. A115. 2203.15822. 2022A&A...664A.115Z. 247793082.

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