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NGC 1512

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NGC 1512
The inner ring of NGC 1512 as imaged by the Hubble Space Telescope (HST).
Credit: HST/NASA/ESA.
Observation data (J2000 epoch)
ConstellationHorologium
Right ascension04h 03m 54.3s[1]
Declination−43° 20′ 56″[1]
Redshift898 ± 3 km/s[1]
Distance11.6 Mpc (38 Mly) h−1
0.73[2]
Apparent magnitude (V)11.1[1]
Characteristics
TypeSB(r)ab[1]
Apparent size (V)8′.9 × 5′.6[1]
Other designations
PGC 14391[1]

NGC 1512 is a barred spiral galaxy approximately 38 million light-years away from Earth[2] in the constellation Horologium. The galaxy displays a double ring structure, with one ring around the galactic nucleus and another further out in the main disk. The galaxy hosts an extended UV disc with at least 200 clusters with recent star formation activity.[3] NGC 1512 is a member of the Dorado Group.[4]

Gravitational interaction with NGC 1510

Gravitational tidal forces of NGC 1512 are influencing nearby dwarf lenticular galaxy NGC 1510. The two galaxies are separated by only ∼5 arcmin (13.8 kpc),[3] and are in the process of a lengthy merger which has been going on for 400 million years.[5] At the end of this process NGC 1512 will have cannibalised its smaller companion.[6]

Interaction between these two galaxies has triggered star formation activity in the outskirts of the disc and enhanced the tidal distortion in the arms of the NGC 1512. The interaction seems to occur in the north-western areas of the system because of the broadening of the H i arm and the spread of the UV-rich star clusters in this region.[3]

See also

References

  1. ^ a b c d e f g "NASA/IPAC Extragalactic Database". Results for NGC 1512. Retrieved 2006-11-25.
  2. ^ a b "NASA/IPAC Extragalactic Database". Results for NGC 1512, Co-Moving Radial Distance. Retrieved 2014-12-18.
  3. ^ a b c Koribalski, Bärbel S.; López-Sánchez, Ángel R. (2009). "Gas dynamics and star formation in the galaxy pair NGC 1512/1510". Monthly Notices of the Royal Astronomical Society. 400 (4): 21. arXiv:0908.4128. Bibcode:2009MNRAS.400.1749K. doi:10.1111/j.1365-2966.2009.15610.x.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  4. ^ Maia, M. A. G.; da Costa, L. N.; Latham, David W. (April 1989). "A catalog of southern groups of galaxies". Astrophysical Journal Supplement Series. 69: 809–829. Bibcode:1989ApJS...69..809M. doi:10.1086/191328.
  5. ^ a b "Galactic David and Goliath". www.spacetelescope.org. Archived from the original on 1 December 2017. Retrieved 27 November 2017.
  6. ^ "NGC 1512 and NGC 1510". sci.esa.int. Archived from the original on 1 December 2017. Retrieved 27 November 2017.
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