NGC 7020
| NGC 7020 | |
|---|---|
 The ringed galaxy NGC 7020. | |
| Observation data (J2000 epoch) | |
| Constellation | Pavo |
| Right ascension | 21h 11m 20.1s[1] |
| Declination | −64° 01′ 31″[1]. |
| Redshift | 0.010677/3201 km/s[1] |
| Distance | 147 Mly |
| Apparent magnitude (V) | 11.8[1] |
| Characteristics | |
| Type | (R)SA0^+(r)[1] |
| Size | ~143,691 ly (estimated)[1] |
| Apparent size (V) | 3.5' x 1.6[1] |
| Other designations | |
| NGC 7021, ESO 107-13, PGC 66291[1] | |
NGC 7020 is a barred lenticular galaxy located about 147 million light-years away in the constellation Pavo.[2][3] NGC 7020 has an estimated diameter of 143,700 light-years.[3][4] It is also part of small group of galaxies called [CHM2007] HDC 1148.[5] NGC 7020 was discovered by astronomer John Herschel on August 31, 1836.[6]
Physical Characteristics
NGC 7020 has a large outer ring surrounding a bright inner hexagonal zone containing an inner ring and possibly a bar. The large outer ring is completely detached from the inner hexagonal zone of the galaxy and is dominated by numerous flocculent spiral features. The outer ring has a measured diameter of 109,603 light-years (33.6 kpc). The ring is knotty and bluer than the rest of the galaxy and shows where recent star formation is occurring in NGC 7020. The possible inner ring shows protruding features at the ends of its major axis therefore classifying it as a bar. The galaxy appears to be fairly free of ionized gas, which is not surprising for an early-type galaxy.[7][8]
See also
External links
- NGC 7020 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
References
- 1 2 3 4 5 6 7 8 "NASA/IPAC Extragalactic Database". Results for NGC 7020. Retrieved 2017-06-06.
- ↑ Rojas, Sebastián García. "Galaxy NGC 7020 - Galaxy in Pavo Constellation · Deep Sky Objects Browser". DSO Browser. Retrieved 2017-06-07.
- 1 2 "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-06-07.
- ↑ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-06-07.
- ↑ "NGC 7020". simbad.u-strasbg.fr. Retrieved 2017-06-09.
- ↑ "New General Catalog Objects: NGC 7000 – 7049". cseligman.com. Retrieved 2017-04-15.
- ↑ Grouchy, R. D.; Buta, R. J; Salo, H.; Laurikainen, E. (3 May 2010). "RING STAR FORMATION RATES IN BARRED AND NONBARRED GALAXIES". The Astronomical Journal. 139: 2465–2493. doi:10.1088/0004-6256/139/6/2465/pdf.
- ↑ "NGC 7020 - (R)SAB(r?)0/a". Retrieved 2017-06-07.