LEDA 1313424

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LEDA 1313424
LEDA 1313424 (opo2506).jpg
LEDA 1313424 imaged by the Hubble Space Telescope. The blue dwarf galaxy can be seen on the center left of the galaxy.
Observation data (J2000 epoch)
Constellation Pisces
Right ascension 00h 09m 39.3477s [1]
Declination +07° 04′ 49.292″ [1]
Redshift 0.039414 [1]
Heliocentric radial velocity 11,816±248 km/s [1]
Distance 551.1 ± 42.1  Mly (168.97 ± 12.92  Mpc) [1]
Characteristics
Type Collisional ring galaxy
Size250,000 ly
Apparent size  (V)0.62′ × 0.50′ [2]
Notable featuresA nine ringed collisional galaxy
Other designations
Bullseye galaxy, WISEA J000939.34+070449.2, 2MASX J00093930+0704489 [1]

LEDA 1313424 (also known as the Bullseye Galaxy) is a collisional ring galaxy (CRG) located in the Pisces constellation around 551 million light years from Earth. [1] [3] It is notable for its nine identified rings making it the galaxy with the most amount of rings discovered. [4] About 50 million years ago, a blue dwarf galaxy collided with LEDA 1313424 through its central region, initiating a burst of star formation and causing it to have an active galactic nucleus (AGN). The impactor is currently 130,000 light years from LEDA 1313424. [5]

Contents

Illustration of LEDA 1313424 compared to the Milky Way galaxy, the galaxy which Earth is located. Milky Way Compared to Galaxy LEDA 1313424 (Artist's Concept) (2025-006).png
Illustration of LEDA 1313424 compared to the Milky Way galaxy, the galaxy which Earth is located.

Morphology

Artistic concept diagram of the rings of LEDA 1313424. Diagram of Rings in the Bullseye (Artist's Concept) (2025-006).png
Artistic concept diagram of the rings of LEDA 1313424.

Currently, nine rings have been identified in LEDA 1313424 with several 'piled up' near the central region of the galaxy and others extending tens of kiloparsecs from the center of the galaxy (~70 kpc). The outskirts of the galaxy have numerous star formation regions which surround the much redder inner ring structures. [4]

Collision Event

Around 50 million years ago, a small blue dwarf galaxy merged with LEDA 1313424 nearly head-on. The galaxy passed through the central region of LEDA 1313424 at an estimated speed ranging from 500-2000 kilometers per second. [4] [6] This collision event with the dwarf galaxy passing through the center of the galaxy is how LEDA 1313424 received its nickname. [7]

References

  1. 1 2 3 4 5 6 7 "Results for object WISEA J000939.34+070449.2". NASA/IPAC Extragalactic Database. NASA and Caltech . Retrieved 9 April 2025.
  2. ↑ "LEDA 1313424". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 8 April 2025.
  3. ↑ "Galaxy LEDA 1313424 (Advanced Camera for Surveys Image) - NASA Science". 2025-02-04. Retrieved 2025-04-08.
  4. 1 2 3 Pasha, Imad; van Dokkum, Pieter G.; Liu, Qing; Bowman, William P.; Janssens, Steven R.; Keim, Michael A.; Neufeld, Chloe; Abraham, Roberto (February 2025). "The Bullseye: HST, Keck/KCWI, and Dragonfly Characterization of a Giant Nine-ringed Galaxy". The Astrophysical Journal Letters. 980 (1): L3. arXiv: 2502.09722 . Bibcode:2025ApJ...980L...3P. doi: 10.3847/2041-8213/ad9f5c . ISSN   2041-8205.
  5. ↑ "Galaxy LEDA 1313424". www.esa.int. Retrieved 2025-04-08.
  6. ↑ Lazaro, Enrico de (2025-02-04). "Astronomers Detect Nine Star-Filled Rings around Giant Galaxy | Sci.News". Sci.News: Breaking Science News. Retrieved 2025-04-08.
  7. ↑ "Bullseye Galaxy (LEDA 1313424) – Constellation Guide". www.constellation-guide.com. Retrieved 2025-04-08.
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