The Sunyaev-Zeldovich effect in the Spiderweb protocluster

This image shows the protocluster around the Spiderweb galaxy (formally known as MRC 1138-262), seen at a time when the Universe was only 3 billion years old. Most of the mass in the protocluster does not reside in the galaxies that can be seen in the centre of the image, but in the gas known as the intracluster medium (ICM). The hot gas in the ICM is shown as an overlaid blue cloud. 

The hot gas was detected with the Atacama Large Millimeter/submillimeter Array (ALMA), of which ESO is a partner. As light from the cosmic microwave background –– the relic radiation from the Big Bang –– travels through the ICM, it gains energy when it interacts with the electrons in the hot gas. This is known as the Sunyaev-Zeldovich effect. By studying this effect, astronomers can infer how much hot gas resides in the ICM, and show that the Spiderweb protocluster is in the process of becoming a massive cluster held together by its own gravity.

Crediti:

ESO/Di Mascolo et al.; HST: H. Ford

Riguardo l'immagine

Identificazione:eso2304a
Tipo:Osservazione
Data di rilascio:Mercoledì 29 Marzo 2023 17:00
Notizie relative:eso2304
Grandezza:1500 x 1500 px

Riguardo all'oggetto

Nome:Spiderweb Galaxy
Tipo:Early Universe : Cosmology : Morphology : Large-Scale Structure
Constellation:Hydra
Categoria:Cosmology
Galaxy Clusters

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Coordinate

Position (RA):11 40 48.50
Position (Dec):-26° 29' 8.62"
Field of view:1.00 x 1.00 arcminutes
Orientazione:Il Nord è a -0.0° a sinistra della verticale

Colori e filtri

BandaLunghezza d'ondaTelescopio
Ottico
G
475 nmHubble Space Telescope
ACS
Millimetro
CO
2.7 mmAtacama Large Millimeter/submillimeter Array
Band 3
Ottico
I
814 nmHubble Space Telescope
ACS
Ottico
G
475 nmHubble Space Telescope
ACS
Ottico
I
814 nmHubble Space Telescope
ACS