Fichier:A jellyfish galaxy adrift (potw2321a).jpg

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Description	English: The jellyfish galaxy JW39 hangs serenely in this image from the NASA/ESA Hubble Space Telescope. This galaxy lies over 900 million light-years away in the constellation Coma Berenices, and is one of several jellyfish galaxies that Hubble has been studying over the past two years.Despite this jellyfish galaxy’s serene appearance, it is adrift in a ferociously hostile environment; a galaxy cluster. Compared to their more isolated counterparts, the galaxies in galaxy clusters are often distorted by the gravitational pull of larger neighbours, which can twist galaxies into a variety of weird and wonderful shapes. If that was not enough, the space between galaxies in a cluster is also pervaded with a searingly hot plasma known as the intracluster medium. While this plasma is extremely tenuous, galaxies moving through it experience it almost like swimmers fighting against a current, and this interaction can strip galaxies of their star-forming gas.This interaction between the intracluster medium and the galaxies is called ram-pressure stripping, and is the process responsible for the trailing tendrils of this jellyfish galaxy. As JW39 has moved through the cluster the pressure of the intracluster medium has stripped away gas and dust into long trailing ribbons of star formation that now stretch away from the disc of the galaxy.Astronomers using Hubble’s Wide Field Camera 3 studied these trailing tendrils in detail, as they are a particularly extreme environment for star formation. Surprisingly, they found that star formation in the ‘tentacles’ of jellyfish galaxies was not noticeably different from star formation in the galaxy disc.[Image Description: A spiral galaxy. It is large in the centre with a lot of detail visible. The core glows brightly and is surrounded by concentric rings of dark and light dust. The spiral arms are thick and puffy with grey dust and glowing blue areas of star formation. They wrap around the galaxy to form a ring. Part of the arm is drawn out into a dark thread above the galaxy, and dust from the arm trails off to the right.]
Date	22 mai 2023 (date de téléversement)
Source	A jellyfish galaxy adrift
Auteur	ESA/Hubble & NASA, M. Gullieuszik and the GASP team
Autres versions	TIFF version

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	Date et heure	Vignette	Dimensions	Utilisateur	Commentaire
actuel	22 mai 2023 à 06:48		2 156 × 2 156 (1,28 Mio)	OptimusPrimeBot	#Spacemedia - Upload of https://cdn.spacetelescope.org/archives/images/large/potw2321a.jpg via Commons:Spacemedia

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Logiciel utilisé	Adobe Photoshop 24.3 (Windows)
Date de modification du fichier	19 mai 2023 à 01:29
Date et heure de la numérisation	5 août 2021 à 17:43
Date de la dernière modification des métadonnées	19 mai 2023 à 03:29
Identifiant unique du document original	xmp.did:62cd9907-0a52-1e4a-9b33-e7e14cb4bbd9
Source	ESA/Hubble
Crédit ou fournisseur	ESA/Hubble & NASA, M. Gullieuszik and the GASP team
Titre court	A jellyfish galaxy adrift
Titre de l’image	The jellyfish galaxy JW39 hangs serenely in this image from the NASA/ESA Hubble Space Telescope. This galaxy lies over 900 million light-years away in the constellation Coma Berenices, and is one of several jellyfish galaxies that Hubble has been studying over the past two years. Despite this jellyfish galaxy’s serene appearance, it is adrift in a ferociously hostile environment; a galaxy cluster. Compared to their more isolated counterparts, the galaxies in galaxy clusters are often distorted by the gravitational pull of larger neighbours, which can twist galaxies into a variety of weird and wonderful shapes. If that was not enough, the space between galaxies in a cluster is also pervaded with a searingly hot plasma known as the intracluster medium. While this plasma is extremely tenuous, galaxies moving through it experience it almost like swimmers fighting against a current, and this interaction can strip galaxies of their star-forming gas. This interaction between the intracluster medium and the galaxies is called ram-pressure stripping, and is the process responsible for the trailing tendrils of this jellyfish galaxy. As JW39 has moved through the cluster the pressure of the intracluster medium has stripped away gas and dust into long trailing ribbons of star formation that now stretch away from the disc of the galaxy. Astronomers using Hubble’s Wide Field Camera 3 studied these trailing tendrils in detail, as they are a particularly extreme environment for star formation. Surprisingly, they found that star formation in the ‘tentacles’ of jellyfish galaxies was not noticeably different from star formation in the galaxy disc. [Image Description: A spiral galaxy. It is large in the centre with a lot of detail visible. The core glows brightly and is surrounded by concentric rings of dark and light dust. The spiral arms are thick and puffy with grey dust and glowing blue areas of star formation. They wrap around the galaxy to form a ring. Part of the arm is drawn out into a dark thread above the galaxy, and dust from the arm trails off to the right.] Links First science paper in the Astrophysical Journal Second science paper in the Astrophysical Journal
Coordonnées de contact	https://esahubble.org ESA Office, Space Telescope Science Institute, 3700 San Martin Dr 21218 Baltimore, MD United States
Conditions d’utilisation	Creative Commons Attribution 4.0 International License
Date et heure de génération des données	22 mai 2023 à 06:00
Version d’IIM	4

Fichier:A jellyfish galaxy adrift (potw2321a).jpg

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dépeint

galaxie méduse

statut des droits d'auteur

sous droit d'auteur

licence

Creative Commons Attribution 4.0 International

type MIME

image/jpeg

somme de contrôle

65e745f4457b3bf1070e8ac16fee317ad1f83aea

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1 343 441 octet

hauteur

2 156 pixel

largeur

2 156 pixel

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