Perseus Galaxienhaufen (Thomas Ebert)

Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: IC 312 · IC 313 · NGC 1260 · NGC 1265 · NGC 1267 · NGC 1268 · NGC 1270 · NGC 1272 · NGC 1273 · NGC 1275 · NGC 1278 · NGC 1282 · NGC 1283 · NGC 1293 · NGC 1294

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Perseus Galaxienhaufen

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Perseus Galaxienhaufen

Perseus Galaxienhaufen

Der Perseushaufen (Abell 426) ist ein Galaxienhaufen im Sternbild Perseus und ist etwa 240 Millionen Lichtjahre entfernt. Seine mittlere Radialgeschwindigkeit beträgt etwa 5400 Kilometer pro Sekunde. Er ist einer der nächsten reichen Galaxienhaufen und umfasst etwa 500 bis 1000 Galaxien, die sich am Himmel über ein Gebiet mit einem Durchmesser von etwa 15° verteilen. Er besteht vor allem aus gelblichen elliptischen und linsenförmigen Galaxien und hat eine geschätzte Gesamtmasse von 2×1015 Sonnenmassen[1]. Nach dem Schema von Rood und Sastry (RS-Schema) wird der Haufen aufgrund seiner langgestreckten Form als Typ L klassifiziert.

Der Perseushaufen enthält unter anderem die starke Radioquelle Perseus A (3C 84), die mit der riesigen cD-Galaxie NGC 1275 im Zentrum des Haufens assoziiert ist. Das relativistische Plasma im Zentrum des Haufens um NGC 1275 ist auch die Quelle starker Röntgenstrahlung, die den Perseushaufen zum hellsten Galaxienhaufen in diesem Spektralbereich machen.

Astronomen entdeckten im Jahr 2003 im Zentrum des Galaxienhaufens den zu diesem Zeitpunkt tiefsten gemessenen akustischen Ton im Universum[2] und sorgten damit für eine Sensation. Nach 53 Stunden Beobachtung durch das Weltraum-Röntgenteleskop Chandra konnten die Forscher Klangwellen innerhalb des relativistischen Gases ausmachen, das ein riesiges schwarzes Loch im Zentrum des Haufens umgibt. Die Wellenlänge ist nahe dem Ton B, 57 Oktaven unter dem eingestrichenen C.

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Basic success
Started	...
Astrometry.net job	1262420
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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