NGC 5714
| Galaxie NGC 5714 | |
|---|---|
 (c) ESA/Hubble, CC BY 4.0 | |
| Aufgenommen mithilfe des Hubble-Weltraumteleskops | |
| AladinLite | |
| Sternbild | Bärenhüter |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 14h 38m 11,5s[1] |
| Deklination | +46° 38′ 18″[1] |
| Erscheinungsbild | |
| Morphologischer Typ | Sc[1] |
| Helligkeit (visuell) | 13,4 mag[2] |
| Helligkeit (B-Band) | 14,1 mag[2] |
| Winkelausdehnung | 3,2′ × 0,4′[2] |
| Positionswinkel | 82°[2] |
| Flächenhelligkeit | 13,5 mag/arcmin²[2] |
| Physikalische Daten | |
| Rotverschiebung | 0.007462 ±0.000023[1] |
| Radialgeschwindigkeit | 2237 ±7 km/s[1] |
| Hubbledistanz H0 = 73 km/(s • Mpc) | (105 ± 8) · 106 Lj (32,2 ± 2,3) Mpc [1] |
| Geschichte | |
| Entdeckung | Wilhelm Herschel |
| Entdeckungsdatum | 12. Mai 1787 |
| Katalogbezeichnungen | |
| NGC 5714 • UGC 9431 • PGC 52307 • CGCG 248-014 • MCG +08-27-11 • IRAS 14363+4651 • GC 3965 • H III 675 • h 1861 • LDCE 1062 NED003 | |
NGC 5714 ist eine 13,4 mag helle Spiralgalaxie vom Hubble-Typ Sc im Sternbild Bärenhüter und etwa 105 Millionen Lichtjahre von der Milchstraße entfernt.
Sie wurde am 12. Mai 1787 von Wilhelm Herschel mit einem 18,7-Zoll-Spiegelteleskop entdeckt,[3] der sie dabei mit „"vF, pS, iF, sp 2 small unequal stars“[4] beschrieb.
Weblinks
- The curious case of calcium-rich supernovae
- NGC 5714. SIMBAD, abgerufen am 14. April 2016 (englisch).
- astronews.com: Bild des Tages 27. März 2018
- NGC 5714. DSO Browser, abgerufen am 14. April 2016 (englisch).
Einzelnachweise
Auf dieser Seite verwendete Medien
(c) ESA/Hubble, CC BY 4.0
The curious case of calcium-rich supernovae
This image, captured by the Advanced Camera for Surveys (ACS) on the NASA/ESA Hubble Space Telescope, shows the spiral galaxy NGC 5714, about 130 million light-years away in the constellation of Boötes (the Herdsman). NGC 5714 is classified as a Sc spiral galaxy, but its spiral arms — the dominating feature of spiral galaxies — are almost impossible to see, as NGC 1787 presents itself at an almost perfectly edge-on angle.
Discovered by William Herschel in 1787, NGC 5714 was host to a fascinating and rare event in 2003. A faint supernova appeared about 8000 light-years below the central bulge of NGC 5714. Supernovae are the huge, violent explosions of dying stars, and the one that exploded in NGC 5714 — not visible in this much later image — was classified as a Type Ib/c supernova and named SN 2003dr. It was particularly interesting because its spectrum showed strong signatures of calcium.
Calcium-rich supernovae are rare and hence of great interest to astronomers. Astronomers still struggle to explain these particular explosions as their existence presents a challenge to both observation and theory. In particular, their appearance outside of galaxies, their lower luminosity compared to other supernovae, and their rapid evolution are still open questions for researchers.
Credit:
ESA/Hubble & NASA
Coordinates Position (RA): 14 38 9.96 Position (Dec): 46° 38' 22.57" Field of view: 3.37 x 1.96 arcminutes Orientation: North is 6.3° left of vertical
Colours & filters Band Wavelength Telescope Optical B 435 nm Hubble Space Telescope ACS Optical B 435 nm Hubble Space Telescope ACS Optical V 606 nm Hubble Space Telescope ACS Optical V 606 nm Hubble Space Telescope ACS.