Wo ist der Galaxienhaufen?
Dieses Bild, das mit dem Wide-Field Imager am MPG/ESO-2,2-Meter-Teleskop aufgenommen wurde, zeigt den Himmelsabschnitt um den Galaxienhaufen PLCKESZ G286.6-31.3. Der Haufen selbst ist zunächst schwer zu erkennen und zeigt sich als leichte Häufung gelblicher Galaxien etwas oberhalb der Bildmitte.
PLCKESZ G286.6-31.3 beherbergt an die 1000 Galaxien und gewaltige Mengen heißen Gases und Dunkler Materie. Somit hat der Haufen ein Gesamtmasse von etwa 530 Billionen (530.000.000.000.000) Sonnenmassen!
Von der Erde aus sehen wir PLCKESZ G286.6-31.3 durch die äußeren Gebiete der Großen Magellansche Wolke (engl. Large Magellanic Clound, kurz LMC) hindurch – eine der Begleitgalaxien der Milchstraße. Die LMC beherbergt über 700 Sternhaufen und überdies noch Hunderttausende Riesen- und Überriesensterne. Der Großteil kosmischer Objekte in diesem Bild sind Sterne und Sternhaufen der LMC.
Das MPG/ESO-2,2-Meter-Teleskop ist am La-Silla-Observatorium der ESO seit 1984 in Betrieb. Das Teleskop wurde in einer Vielzahl wegbereitender wissenschaftlicher Studien genutzt, darunter in der bahnbrechenden Erforschung der Gammablitze, den energiereichsten Explosionen im ganzen Universum. Der Wide Field Imager (WFI) mit seinen 67-Megapixeln, montiert im Cassegrainfokus des Teleskops, liefert seit 1999 detaillierte Bilder schwacher, entfernter Himmelsobjekte.
Die Bilddaten wurden urspünglich im Zuge des Wettbewerbs "Hidden Treasures" (auf Deutsch: "verborgene Schätze") aus dem ESO-Archiv ausgewählt.
Bildnachweis:ESO
Acknowledgements: Flickr user hdahle70
Über das Bild
| ID: | potw1731a |
| Sprache: | de-ch |
| Typ: | Beobachtung |
| Veröffentlichungsdatum: | 31. Juli 2017 06:00 |
| Größe: | 8321 x 6021 px |
Über das Objekt
| Name: | PLCKESZ G286.6-31.3 |
| Typ: | Local Universe : Galaxy : Grouping : Cluster |
| Entfernung: | z=0.21 (Rotverschiebung) |
| Constellation: | Mensa |
Bildformate
Bildschirm-Hintergrundbilder
Koordinaten
| Position (RA): | 5 31 15.95 |
| Position (Dec): | -75° 15' 43.16" |
| Field of view: | 33.02 x 23.90 arcminutes |
| Orientierung: | Die Nordrichtung liegt -0.0° links zur Vertikale |
Farben & Filter
| Spektralbereich | Wellenlänge | Teleskop |
|---|---|---|
| Optisch V | 539 nm | MPG/ESO 2.2-metre telescope WFI |
| Optisch R | 651 nm | MPG/ESO 2.2-metre telescope WFI |
| Optisch I | 826 nm | MPG/ESO 2.2-metre telescope WFI |
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