NGC 759

NGC 759
2MASS image of NGC 759.
Observation data (J2000 epoch)
Constellation	Andromeda
Right ascension	01h 57m 50.3s[1]
Declination	36° 20′ 35″[1]
Redshift	0.015567[1]
Heliocentric radial velocity	4667 km/s[1]
Distance	230 Mly (70.4 Mpc)[1]
Group or cluster	Abell 262
Apparent magnitude (V)	13.3[1]
Characteristics
Type	E[1]
Size	~110,000 ly (33 kpc) (estimated)[1]
Apparent size (V)	1.6 × 1.4[1]
Other designations
MCG 6-5-67, PGC 7397, UGC 1440[1]

NGC 759 is an elliptical galaxy located 230 million light-years away^[2] in the constellation Andromeda. NGC 759 was discovered by astronomer by Heinrich d'Arrest on September 17, 1865.^[3] It is a member of Abell 262.^{[4][5][6][7][8]}

Despite being classified as a radio galaxy,^{[9][10][11][12][13]} the radio emission in NGC 759 could be due to star formation rather than an active galactic nucleus.^[12][13]

Dust disk

The central region of NGC 759 harbors a face-on dust disk with tightly wound spiral structure. The disk has a diameter of 11,000 ly (3.4 kpc).^[14] The dust disk also contains a smaller circumnuclear molecular gas ring that has star formation in H II regions.^[15][16] These features may be the result of a merger of gas-rich disk galaxies^[15][16][17] or by the accretion of gas-rich material. In either scenario, the gas would have lost momentum and fallen to the center of the galaxy to produce the disk and current star formation.^[17] However, Vlasyuk et al. suggests that the disk and the smaller circumnuclear molecular gas ring with star formation inside the main disk formed from a tidal encounter between NGC 759 and a large spiral galaxy which was accompanied by a substantial gas accretion.^[16]

Molecular gas

NGC 759 contains 2.4 × 10⁹ M☉ of molecular gas. Most of the gas is concentrated in a circumnuclear molecular gas ring with a diameter of 4,200 ly (1.3 kpc).^[15] The gas may be the result of the same merger event that produced the circumnuclear molecular gas ring and the main disk.^[16][15][17]

SN 2002fb

NGC 759 has had one supernova,^[18] SN 2002fb which was discovered on September 6, 2002. It was classified as a type Ia supernova.^[19][20][21]

See also

• List of NGC objects (1–1000)

References

External links

Wikimedia Commons has media related to NGC 759.

• NGC 759 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

This page was last edited on 13 August 2023, at 22:02