NGC 1549

NGC 1549 is an elliptical galaxy located in the constellation Dorado. It is located at a distance of about 50 million light years from Earth, which, given its apparent dimensions, means that NGC 1549 is about 75,000 light years across. NGC 1549 was discovered by John Herschel on 6 December 1835 and may have been observed by James Dunlop in 1826. It is a member of the Dorado Group.

In the centre of NGC 1549 is expected to lie a supermassive black hole, whose mass is estimated to be between 390 and 810 million (10^{8.76+0.15
−0.17}) M_☉ based on the Sérsic index of the galaxy. No polycyclic aromatic hydrocarbons (PAHs) emission, an indicator for the presence of interstellar dust, was detected by the Infrared Spectrograph onboard Spitzer Space Telescope. NGC 1549 has been found to emit X-rays, with its total flux exceeding 2×10⁴⁰ ergs s–1 for the 0.3–5 keV band. A total number of 150 globular clusters are estimated to exist in NGC 1549, a number low compared to similar size galaxies. The outer isophotes of the galaxy appear twisted and feature faint shells.

NGC 1549 forms an interacting pair with the lenticular galaxy NGC 1553, which lies 12 arcminutes to the south. It is the largest elliptical galaxy in a moderate size galaxy group known as the Dorado Group.

References

External links

• Media related to NGC 1549 at Wikimedia Commons
• NGC 1549 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
• NGC 1549 on SIMBAD

1. Dorado Group
2. NGC 1553
3. NGC 1531
4. New General Catalogue
5. NGC 1510
6. NGC 1535
7. List of NGC objects (1001–2000)
8. NGC 1501
9. NGC 1532
10. List of NGC objects
11. NGC 1502
12. Sh2-279
13. NGC 1255
14. Orion Nebula
15. NGC 1512
16. Messier 38
17. NGC 1537
18. NGC 1761
19. NGC 1585
20. Messier 79