Fichier:A Wreath of Star Formation in NGC 7469 (52577236876).jpg

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Description	Webb’s holiday card sorted! 🎄 NGC 7469 is like a cosmic wreath bursting with new stars. This galaxy is very dusty, but Webb’s infrared vision can peer through to observe features like the intense ring of star formation close around its bright center. Read more: esawebb.org/images/potm2212a/ What are those large spikes? They’re not real objects, but diffraction spikes, an effect of very bright light interacting with the telescope mirrors. Here the center of the galaxy is extremely bright due to light emitted by heated dust and gas falling into the central black hole. Image credit: ESA/Webb, NASA & CSA, L. Armus, A. S. Evans [Image description: A face-on galaxy, with gray spiral arms, sprinkled with bright red patches of star formation. Its center glows brightly and 6 spikes project from it - these are diffraction spikes. In the background are red and white glowing dots, which are other galaxies. Some of the background galaxies are recognizable as spirals.]
Date	21 décembre 2022, 10:00
Source	A Wreath of Star Formation in NGC 7469
Auteur	NASA's James Webb Space Telescope from Greenbelt, MD, USA

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Cette image a été originellement postée sur Flickr par James Webb Space Telescope à l'adresse https://flickr.com/photos/50785054@N03/52577236876. Elle a été passée en revue le 6 juin 2023 par le robot FlickreviewR 2, qui a confirmé qu'elle se trouvait sous licence cc-by-2.0.

6 juin 2023

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	Date et heure	Vignette	Dimensions	Utilisateur	Commentaire
actuel	6 juin 2023 à 22:38		4 121 × 4 103 (7,09 Mio)	Astromessier	Transferred from Flickr via #flickr2commons

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NGC 7469

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Orientation	Normale
Résolution horizontale	25,4 pt/po
Résolution verticale	25,4 pt/po
Logiciel utilisé	Adobe Photoshop 24.0 (Windows)
Date de modification du fichier	19 décembre 2022 à 22:41
Positionnement YCbCr	Centré
Version d’EXIF	2.32
Date et heure de génération des données	21 décembre 2022 à 10:00
Date et heure de la numérisation	23 novembre 2022 à 14:59
Signification de chaque composante	Y Cb Cr n’existe pas
Version de FlashPix prise en charge	1
Espace colorimétrique	Non calibré
Version d’IIM	4
Titre court	A Wreath of Star Formation in NGC 7469
Crédit ou fournisseur	ESA/Webb, NASA & CSA, L. Armus,
Source	ESA/Webb
Titre de l’image	This image is dominated by NGC 7469, a luminous, face-on spiral galaxy approximately 90 000 light-years in diameter that lies roughly 220 million light-years from Earth in the constellation Pegasus. Its companion galaxy IC 5283 is partly visible in the lower left portion of this image. This spiral galaxy has recently been studied as part of the Great Observatories All-sky LIRGs Survey (GOALS) Early Release Science program with the NASA/ESA/CSA James Webb Space Telescope, which aims to study the physics of star formation, black hole growth, and feedback in four nearby, merging luminous infrared galaxies. Other galaxies studied as part of the survey include previous ESA/Webb Pictures of the Month II ZW 096 and IC 1623. NGC 7469 is home to an active galactic nucleus (AGN), which is an extremely bright central region that is dominated by the light emitted by dust and gas as it falls into the galaxy’s central black hole. This galaxy provides astronomers with the unique opportunity to study the relationship between AGNs and starburst activity because this particular object hosts an AGN that is surrounded by a starburst ring at a distance of a mere 1500 light-years. While NGC 7469 is one of the best studied AGNs in the sky, the compact nature of this system and the presence of a great deal of dust have made it difficult for scientists to achieve both the resolution and sensitivity needed to study this relationship in the infrared. Now, with Webb, astronomers can explore the galaxy’s starburst ring, the central AGN, and the gas and dust in between. Using Webb’s MIRI, NIRCam and NIRspec instruments to obtain images and spectra of NGC 7469 in unprecedented detail, the GOALS team has uncovered a number of details about the object. This includes very young star-forming clusters never seen before, as well as pockets of very warm, turbulent molecular gas, and direct evidence for the destruction of small dust grains within a few hundred light-years of the nucleus — proving
Bits par composante	16 16 16
Schéma de compression	Non compressé
Hauteur	4 103 px
Largeur	4 121 px
Composition des pixels	RVB
Nombre de composantes	3
Coordonnées de contact	https://esawebb.org ESA Office, Space Telescope Science Institute, 3700 San Martin Dr 21218 Baltimore, MD United States
Éditeur de la publication	ESA/Webb
Type de média	Observation
Date de la dernière modification des métadonnées	19 décembre 2022 à 23:41
Identifiant unique du document original	xmp.did:1b6182a3-d0c1-9548-895a-a646ebd3c0e2
Conditions d’utilisation	Creative Commons Attribution 4.0 International License
Commentaire de fichier JPEG	This image is dominated by NGC 7469, a luminous, face-on spiral galaxy approximately 90 000 light-years in diameter that lies roughly 220 million light-years from Earth in the constellation Pegasus. Its companion galaxy IC 5283 is partly visible in the lower left portion of this image. This spiral galaxy has recently been studied as part of the Great Observatories All-sky LIRGs Survey (GOALS) Early Release Science program with the NASA/ESA/CSA James Webb Space Telescope, which aims to study the physics of star formation, black hole growth, and feedback in four nearby, merging luminous infrared galaxies. Other galaxies studied as part of the survey include previous ESA/Webb Pictures of the Month II ZW 096 and IC 1623. NGC 7469 is home to an active galactic nucleus (AGN), which is an extremely bright central region that is dominated by the light emitted by dust and gas as it falls into the galaxy’s central black hole. This galaxy provides astronomers with the unique opportunity to study the relationship between AGNs and starburst activity because this particular object hosts an AGN that is surrounded by a starburst ring at a distance of a mere 1500 light-years. While NGC 7469 is one of the best studied AGNs in the sky, the compact nature of this system and the presence of a great deal of dust have made it difficult for scientists to achieve both the resolution and sensitivity needed to study this relationship in the infrared. Now, with Webb, astronomers can explore the galaxy’s starburst ring, the central AGN, and the gas and dust in between. Using Webb’s MIRI, NIRCam and NIRspec instruments to obtain images and spectra of NGC 7469 in unprecedented detail, the GOALS team has uncovered a number of details about the object. This includes very young star-forming clusters never seen before, as well as pockets of very warm, turbulent molecular gas, and direct evidence for the destruction of small dust grains within a few hundred light-years of the nucleus — proving that the AGN is impacting the surrounding interstellar medium. Furthermore, highly ionised, diffuse atomic gas seems to be exiting the nucleus at roughly 6.4 million kilometres per hour — part of a galactic outflow that had previously been identified, but is now revealed in stunning detail with Webb. With analysis of the rich Webb datasets still underway, additional secrets of this local AGN and starburst laboratory are sure to be revealed. A prominent feature of this image is the striking six-pointed star that perfectly aligns with the heart of NGC 7469. Unlike the galaxy, this is not a real celestial object, but an imaging artifact known as a diffraction spike, caused by the bright, unresolved AGN. Diffraction spikes are patterns produced as light bends around the sharp edges of a telescope. Webb has three struts, with two angled at 150 degrees from its vertical strut, and its primary mirror is composed of hexagonal segments that each contain edges for light to diffract against. Webb’s struts are designed so that their diffraction spikes partially overlap with those created by the mirrors. Both of these lead to Webb’s complex star pattern. [Image Description: This image shows a spiral galaxy that is dominated by a bright central region. The galaxy has blue-purple hues with orange-red regions filled with stars. Also visible is large diffraction spike, which appears as a star pattern over the central region of the galaxy. Lots of stars and galaxies fill the background scene.] Links Video: A Wreath of Star Formation in NGC 7469

Fichier:A Wreath of Star Formation in NGC 7469 (52577236876).jpg

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21 décembre 2022

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e2742088cac173d5ea6d89fd23710ff659ae23e7

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7 436 968 octet

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4 103 pixel

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4 121 pixel

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