NGC 4151
| Galaxie NGC 4151 | |
|---|---|
 (c) Adam Block/Mount Lemmon SkyCenter/University of Arizona, CC BY-SA 4.0 | |
| LEDA 38811, NGC 4156 & NGC 4151[1] aufgenommen mit dem 81-cm-Spiegelteleskop am Mount-Lemmon-Observatorium. | |
| AladinLite | |
| Sternbild | Jagdhunde |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 12h 10m 32,6s [2] |
| Deklination | +39° 24′ 21″ [2] |
| Erscheinungsbild | |
| Morphologischer Typ | (R')SAB(rs)ab: / Sy1.5[2] |
| Helligkeit (visuell) | 10,3 mag[3] |
| Helligkeit (B-Band) | 11,1 mag[3] |
| Winkelausdehnung | 6,3′ × 4,5′[3] |
| Positionswinkel | 146°[3] |
| Flächenhelligkeit | 13,8 mag/arcmin²[3] |
| Physikalische Daten | |
| Zugehörigkeit | WBL 383-001[2] |
| Rotverschiebung | 0.003319 ± 0.000010[2] |
| Radialgeschwindigkeit | (995 ± 3) km/s[2] |
| Hubbledistanz H0 = 73 km/(s • Mpc) | (46 ± 3) · 106 Lj (14,0 ± 1,0) Mpc [2] |
| Geschichte | |
| Entdeckung | William Herschel |
| Entdeckungsdatum | 17. März 1787 |
| Katalogbezeichnungen | |
| NGC 4151 • UGC 7166 • PGC 38739 • CGCG 215-045 • MCG +07-25-044 • IRAS Z12080+3940 • KUG 1208+396A • 2MASX J12103265+3924207 • GC 2756 • H I 165 • h 1111 • NVSS J121032+392420 • Holm 345A • LDCE 867 NED084 | |
NGC 4151, auch "Saurons Auge" genannt, ist eine Balken-Spiralgalaxie mit aktivem Galaxienkern vom Hubble-Typ SBab im Sternbild Jagdhunde am Nordsternhimmel. Sie ist schätzungsweise 46 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 85.000 Lichtjahren. Gemeinsam mit NGC 4156 und PGC 38756 bildet sie das Galaxientrio Holm 345.
Im Zentrum der Galaxie befindet sich ein supermassereiches Schwarzes Loch, welches Röntgenstrahlung emittiert. Der genaue Ursprung dieser Strahlung ist bislang ungeklärt (Stand: März 2011).
Hochaufgelöste Aufnahme des Hubble-Weltraumteleskops
Am 1. April 2018 wurde im Rahmen des Lick Observatory Supernova Search (LOSS) die Typ-II-Supernova SN 2018aoq entdeckt.[4][5]
Das Objekt wurde am 17. März 1787 von William Herschel entdeckt.[6]
Weblinks
- SIMBAD Astronomical Database
- scinexx.de: Astronomen vermessen „Saurons Auge“ 27. November 2014
Einzelnachweise
- ↑ Aladin Lite
- ↑ a b c d e NASA/IPAC EXTRAGALACTIC DATABASE
- ↑ a b c d e SEDS: NGC 4151
- ↑ Spektrum.de
- ↑ Simbad
- ↑ Seligman
Auf dieser Seite verwendete Medien
Autor/Urheber: Judy Schmidt from USA, Lizenz: CC BY 2.0
The brightly glowing bar portion of NGC 4151 as seen by Hubble. It is a Seyfert galaxy, which means that it has an actively accreting black hole at its nucleus, which presents itself to us as an intensely bright source. The two brighter portions near the top and bottom of the frame are where the bar terminates, and some fainter spiral arms extend outward from them. A widefield view of the galaxy by Adam Block is available to help with context: Click!
Mitchell Revalski of Georgia State University contacted me regarding the possibility of processing some of the objects he is using in his thesis, and I have been looking through the data to see what I can do. What's important in this galaxy are the brightly illuminated and glowing hydrogen clouds near the nucleus. They are a bit difficult to make out in this image because the narrowband filters required to highlight these structures were not available in a matching field of view, but some older WF/PC2 data of only the nucleus was available, so I made use of that in another image.
An article discussing this galaxy using a radio / visible / x-ray light image is available here: www.nasa.gov/mission_pages/chandra/multimedia/11-029.html
Data from the following proposal were used to create this image: A Cepheid-Based Distance to the Benchmark AGN NGC 4151
Color saturation was greatly enhanced for the whole image.
Luminosity: WFC3/UVIS F350LP Red: WFC3/UVIS F814W Green: Pseudo Blue: WFC3/UVIS F555W
North is NOT up. It is 30° counter-clockwise from up.(c) Adam Block/Mount Lemmon SkyCenter/University of Arizona, CC BY-SA 4.0
Optics 32-inch Schulman Foundation Telescope (RCOS)
Camera SBIG STX16803 CCD Camera Filters Astrodon Gen II Dates March 2016 Location Mount Lemmon SkyCenter Exposure LRGB = 14 : 6 : 5 : 5 Hours Acquisition Astronomer Control Panel (ACP), Maxim DL/CCD (Cyanogen), FlatMan XL (Alnitak) Processing CCDStack, Photoshop, PixInsight Guest Astronomers Cardiff University (England)
Credit Line & Copyright Adam Block/Mount Lemmon SkyCenter/University of Arizona
This composite image shows the central region of the spiral galaxy NGC 4151, dubbed the "Eye of Sauron" by astronomers for its similarity to the eye of the malevolent character in "The Lord of the Rings". In the "pupil" of the eye, X-rays (blue) from the Chandra X-ray Observatory are combined with optical data (yellow) showing positively charged hydrogen ("H II") from observations with the 1-meter Jacobus Kapteyn Telescope on La Palma. The red around the pupil shows neutral hydrogen detected by radio observations with the NSF's Very Large Array. This neutral hydrogen is part of a structure near the center of NGC 4151 that has been distorted by gravitational interactions with the rest of the galaxy, and includes material falling towards the center of the galaxy. The yellow blobs around the red ellipse are regions where star formation has recently occurred.