• Source: NGC 3077

NGC 3077 is a small disrupted elliptical galaxy, a member of the M81 Group, which is located in the northern constellation Ursa Major. Despite being similar to an elliptical galaxy in appearance, it is peculiar for two reasons. First, it shows wispy edges and scattered dust clouds that are probably a result of gravitational interaction with its larger neighbors, similar to the galaxy M82. Second, this galaxy has an active nucleus. This caused Carl Seyfert in 1943 to include it in his list of galaxies, which are now called Seyfert Galaxies. However, NGC 3077, though an emission line galaxy, is today no longer classified as a Seyfert galaxy.
NGC 3077 was discovered by William Herschel on November 8, 1801. He remarked that "On the nF (NE) side, there is a faint ray interrupting the roundness." Admiral Smyth described it as "A bright-class round nebula; it is a lucid white, and lights up in the centre ... between these [stars,] the sky is intensely black, and shows the nebula as if floating in awful and illimitable space, at an inconceivable distance."
An irregular dwarf object known as the "Garland" is located near NGC 3077.




Distance measurements


At least two techniques have been used to measure distances to NGC 3077. The surface brightness fluctuations (SBF) distance measurement technique estimates distances to spiral galaxies based on the graininess of the appearance of their bulges. The distance measured to NGC 3077 using this technique is 13.2 ± 0.8 Mly (4.0 ± 0.2 Mpc). However, NGC 3077 is close enough that the tip of the red giant branch (TRGB) method may be used to estimate its distance. The estimated distance to NGC 3077 using this technique is 12.5 ± 1.2 Mly (3.82 ± 0.38 Mpc). Averaged together, these distance measurements give a distance estimate of 12.8 ± 0.7 Mly (3.9 ± 0.3 Mpc).[a]




Sources


NGC 3077 at SEDS




Notes






References






External links



NGC 3077 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

Kata Kunci Pencarian:

• Daftar galaksi
• Daftar objek NGC 3001 - 4000
• NGC 3077
• M81 Group
• Messier 81
• List of NGC objects (3001–4000)
• List of galaxies
• Timeline of the early universe
• Herschel 400 Catalogue
• SN 2014J
• NGC 3169
• NGC 3302