NGC 3593
| Galaxy NGC 3593 |
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|---|---|
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| Infrared image taken by the Hubble Space Telescope | |
| AladinLite | |
| Constellation | lion |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 11 h 14 m 37.0 s |
| declination | + 12 ° 49 ′ 04 ″ |
| Appearance | |
| Morphological type | SA (s) 0 / a / HII / Sy2 |
| Brightness (visual) | 11.0 mag |
| Brightness (B-band) | 11.9 likes |
| Angular expansion | 5.2 ′ × 1.9 ′ |
| Position angle | 92 ° |
| Inclination | 67 ° |
| Surface brightness | 13.4 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 231 |
| Redshift | +0.002095 ± 0.000013 |
| Radial velocity | 628 ± 4 km / s |
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Stroke distance v rad / H 0 |
(24 ± 2) x 10 6 ly (7.41 ± 0.52) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | April 12, 1784 |
| Catalog names | |
| NGC 3593 • UGC 6272 • PGC 34257 • CGCG 067-040 • MCG + 02-29-014 • IRAS 11119 + 1305 • 2MASX J11143700 + 1249048 • GC 2347 • H I-29 • h 840 • HIPASS J1114 + 12 • LDCE 778 NED025 | |
NGC 3593 is a lenticular galaxy with an active galaxy core in the Hubble-type S0 / a in the constellation Leo north of the ecliptic . It is estimated to be 24 million light years away from the Milky Way and has a diameter of about 40,000 ly.
In the same area of the sky there are u. a. the galaxies IC 2646 , IC 2652 , IC 2654 , IC 2660 .
It is classified as a starburst galaxy because of the extraordinarily high rate at which new stars are formed in the galaxy . Star formation mainly takes place in a ring around the center, from which a spiral arm detaches. The galaxy is often, but not always, assigned to the M66 group .
Another special feature of NGC 3593 are counter-rotating star populations. The lower-mass, counter-rotating star population is about 1.6 ± 0.8 billion years younger than the first star population in the galaxy. One explanation for this is an influx of gas from outside, in which stars then form. Alternatively, a connection between two galaxies is also conceivable.
Image taken in the visible spectral range by the Hubble Space Telescope
The object was discovered on April 12, 1784 by William Herschel .
Web links
Individual evidence
- ↑ a b c d e f NASA / IPAC EXTRAGALACTIC DATABASE
- ↑ a b c d SEDS : NGC 3593
- ↑ a b L. Coccato, L. Morelli, A. Pizzella, EM Corsini, LM Buson, E. Dalla Bontà: Spectroscopic evidence of distinct stellar populations in the counter-rotating stellar disks of NGC 3593 and NGC 4550 . In: Astronomy & Astrophysics . 549, January 2013, p. A3. arxiv : 1210.7807 . bibcode : 2013A & A ... 549A ... 3C . doi : 10.1051 / 0004-6361 / 201220460 .
- ↑ Seligman