NGC 4051
| Galaxie NGC 4051 | |
|---|---|
 (c) ESA/Hubble, CC BY 4.0 | |
| Aufnahme des Hubble-Weltraumteleskops | |
| AladinLite | |
| Sternbild | Großer Bär |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 12h 03m 09,614s[1] |
| Deklination | +44° 31′ 52,80″[1] |
| Erscheinungsbild | |
| Morphologischer Typ | SAB(rs)bc / Sy1.5[1] |
| Helligkeit (visuell) | 10,0 mag[2] |
| Helligkeit (B-Band) | 10,8 mag[2] |
| Winkelausdehnung | 5,2′ × 3,9′[2] |
| Positionswinkel | 135°[2] |
| Flächenhelligkeit | 13,1 mag/arcmin²[2] |
| Physikalische Daten | |
| Zugehörigkeit | M109-Gruppe NGC 4051-Gruppe LGG 269[1][3] |
| Rotverschiebung | 0.002336 ± 0.000004[1] |
| Radialgeschwindigkeit | (700 ± 1) km/s[1] |
| Hubbledistanz H0 = 73 km/(s • Mpc) | (33 ± 2) · 106 Lj (10,21 ± 0,72) Mpc [1] |
| Durchmesser | 60.000 Lj[4] |
| Geschichte | |
| Entdeckung | William Herschel |
| Entdeckungsdatum | 6. Februar 1788 |
| Katalogbezeichnungen | |
| NGC 4051 • UGC 7030 • PGC 38068 • CGCG 243-038 • MCG +08-22-59 • IRAS 12005+4448 • 2MASX J12030968+4431525 • GC 2680 • H IV 56 • h 1061 • LDCE 867 NED065 • NVSS J120309+443154 • WISEA J120309.60+443152.7 | |
NGC 4051 ist eine Balken-Spiralgalaxie mit aktivem Galaxienkern vom Hubble-Typ SBbc im Sternbild Großer Bär am Nordsternhimmel. Sie ist schätzungsweise 33 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 50.000 Lichtjahren. Die Galaxie enthält ein supermassives Schwarzes Loch mit einer Masse von 1,73 Millionen Sonnenmassen und ist als Seyfert-1,5-Galaxie klassifiziert.
Sie ist Teil M109-Gruppe und hellstes Mitglied der NGC 4051-Gruppe (LGG 269).
Die Supernovae SN 1983I (Typ Ic), SN 2003ie (Typ IIP) und SN 2010br (Typ Ib/c) wurden hier beobachtet.[5][6]
Das Objekt wurde am 6. Februar 1788 von dem Astronomen William Herschel mithilfe eines 18,7 Zoll-Teleskops entdeckt.[7]
NGC 4051-Gruppe (LGG 269)
| Galaxie | Alternativname | Entfernung / Mio. Lj |
|---|---|---|
| NGC 3906 | PGC 36953 | 45 |
| NGC 3938 | PGC 37229 | 38 |
| NGC 4051 | PGC 38068 | 33 |
| NGC 4096 | PGC 38361 | 28 |
| NGC 4111 | PGC 38440 | 37 |
| NGC 4117 | PGC 38503 | 44 |
| NGC 4138 | PGC 38643 | 42 |
| NGC 4143 | PGC 38654 | 44 |
| NGC 4183 | PGC 38988 | 44 |
| NGC 4218 | PGC 39237 | 35 |
| NGC 4288 | PGC 39840 | 26 |
| NGC 4346 | PGC 40228 | 40 |
| NGC 4389 | PGC 40537 | 35 |
| IC 750 | PGC 37719 | 33 |
| PGC 36990 | UGC 6805 | 52 |
| PGC 37038 | UGC 6818 | 38 |
| PGC 38356 | UGC 7089 | 36 |
| PGC 38582 | UGC 7129 | 43 |
| PGC 37584 | UGC 6930 | 38 |
Weblinks
- Spektrum.de: Amateuraufnahmen [1][2]
- An explosive galaxy (engl.)
- CDS Portal
Einzelnachweise
Auf dieser Seite verwendete Medien
(c) ESA/Hubble, CC BY 4.0
When massive stars die at the end of their short lives, they light up the cosmos with bright, explosive bursts of light and material known as supernovae. A supernova event is incredibly energetic and intensely luminous — so much so that it forms what looks like an especially bright new star that slowly fades away over time.
These exploding stars glow so incredibly brightly when they first form that they can be spotted from afar using telescopes such as the NASA/ESA Hubble Space Telescope. The subject of this image, a spiral galaxy named NGC 4051 — about 45 million light-years from Earth — has hosted multiple supernovae in past years. The first was spotted in 1983 (SN 1983I), the second in 2003 (SN 2003ie), and the most recent in 2010 (SN 2010br). These explosive events were seen scattered throughout the centre and spiral arms of NGC 4051.
The SN 1983I and SN 2010br were both categorised as supernovae of type Ic. This type of supernova is produced by the core collapse of a massive star that has lost its outer layer of hydrogen and helium, either via winds or by mass transfer to a companion. Because of this, type Ic — and also type Ib — supernovae are sometimes referred to as stripped core-collapse supernovae.
This galaxy’s beautiful spiral structure can be seen well in this image, along with other intriguing objects (including an emission-line galaxy known as SDSS J120312.35+443045.1, visible as the bright smudge to the lower middle of the image, beneath the sweeping arm of NGC 4051).NGC 4501 sits in the southern part of a cluster of galaxies known as the Ursa Major I Cluster; this cluster is especially rich in spirals such as NGC 4051, and is a subset of the larger Virgo Supercluster, which also houses the Milky Way.
Coordinates Position (RA): 12 3 10.87 Position (Dec): 44° 31' 49.00" Field of view: 2.60 x 1.93 arcminutes Orientation: North is 18.0° left of vertical
Colours & filters Band Wavelength Telescope Ultraviolet UV 275 nm Hubble Space Telescope WFC3 Optical U 336 nm Hubble Space Telescope WFC3 Optical OIII 502 nm Hubble Space Telescope WFC3 Optical OIII 502 nm Hubble Space Telescope WFC3 Optical U 336 nm Hubble Space Telescope WFC3 Optical y 547 nm Hubble Space Telescope WFC3 Optical y 547 nm Hubble Space Telescope WFC3.