Fichier:Wolf-Rayet_140_(Webb-MIRI).png
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Description
DescriptionWolf-Rayet 140 (Webb-MIRI).png |
English: This image from NASA's James Webb Space Telescope reveals at least 17 concentric dust rings emanating from a pair of stars orbiting one another. Located just over 5,000 light-years from Earth, the system is known as Wolf-Rayet 140 because one of the stars is a Wolf-Rayet star. The other is an O-type star, one of the most massive star types known. Each ring was created when the two stars came close together and their stellar winds (streams of gas they blow into space) collided, compressing the gas and forming dust. A ring is produced once per orbit, every 7.93 years.
A Wolf-Rayet star is an O-type star born with at least 25 times more mass than our Sun that is nearing the end of its life, when it will likely collapse directly to black hole, or explode as a supernova. These delays between periods of dust production create the unique ring pattern. Some Wolf-Rayet binaries in which the stars are close enough together and have circular orbits produce dust continuously, often forming a pinwheel pattern. WR 140's rings are also referred to as shells because they are not perfectly circular and are thicker and wider than they appear in the image. The rings appear brighter in some areas but are almost invisible in others, rather than forming a perfect "bullseye" pattern. That's because production of dust is variable as the stars get close to one another, and because Webb views the system at an angle and is not looking directly at the orbital plane of the stars. One of the densest regions of dust production creates the bright feature appearing at 2 o'clock. The image was taken by the Mid-Infrared Instrument (MIRI), now managed by the agency's Goddard Space Flight Center. MIRI was developed through a 50-50 partnership between NASA and ESA (European Space Agency). The Jet Propulsion Laboratory in Southern California led the effort for NASA, and a multinational consortium of European astronomical institutes contributed for ESA. Webb's science instruments detect infrared light, a range of wavelengths emitted by warm objects and invisible to the human eye. MIRI detects the longest infrared wavelengths, which means it can often see cooler objects – including these dust rings – than the other three Webb instruments can. The filters used to take this image were the F770W (7.7 micrometers, shown as blue), F1500W (15 micrometers, shown as green), and F2100W (21 micrometers, shown as red). The observations were done under Webb's early release observation (ERO) program number 1349. The most common element found in stars, hydrogen, can't form dust on its own. But Wolf-Rayet stars in their later stages have blown away all of their hydrogen, so they eject elements typically found deep in a star's interior, like carbon, which can form dust. Data from MIRI's Medium Resolution Spectrometer (MRS) shows that the dust made by WR 140 is likely made of a class of molecules called polycyclic aromatic hydrocarbons (PAHs), which are a type of organic carbon-rich compounds that are thought to enrich the carbon content throughout the Universe. Initial processing of the Webb WR 140 data included eight bright "spikes" of light emanating from the center of the image. These are not features of the system, but so-called artifacts of the telescope itself. They were removed from the image, in order to give viewers an unobscured view of the source object. |
Date | Prise le 27 juillet 2022 |
Source | https://webbtelescope.org/contents/media/images/01GEJB2906TM9VR2FSJ4TFMNQM (image link); description from https://photojournal.jpl.nasa.gov/catalog/PIA25432; see also https://www.nasa.gov/feature/jpl/star-duo-forms-fingerprint-in-space-nasa-s-webb-finds, https://blogs.nasa.gov/webb/2022/10/12/webb-reveals-shells-of-dust-surrounding-brilliant-binary-star-system/, and https://webbtelescope.org/contents/early-highlights/webb-reveals-shells-of-dust-surrounding-brilliant-binary-star-system.html |
Auteur | NASA/ESA/CSA/STScl/JPL-Caltech |
Autres versions |
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Conditions d’utilisation
Public domainPublic domainfalsefalse |
This file is in the public domain because it was created by NASA, ESA and CSA. NASA Webb material is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA/CSA is credited as the source of the material. This license does not apply if source material from other organizations is in use. The material was created for NASA by Space Telescope Science Institute under Contract NAS5-03127. Copyright statement at webbtelescope.org. For material created by the European Space Agency on the esawebb.org site, use the {{ESA-Webb}} tag. |
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Date et heure | Vignette | Dimensions | Utilisateur | Commentaire | |
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actuel | 13 octobre 2022 à 06:39 | 2 258 × 1 558 (2,27 Mio) | Huntster | {{Information |Description={{en|1=This image from NASA's James Webb Space Telescope reveals at least 17 concentric dust rings emanating from a pair of stars orbiting one another. Located just over 5,000 light-years from Earth, the system is known as Wolf-Rayet 140 because one of the stars is a Wolf-Rayet star. The other is an O-type star, one of the most massive star types known. Each ring was created when the two stars came close together and their stellar winds (streams of gas they blow int... |
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Métadonnées
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Espace colorimétrique | sRGB |
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Version d’EXIF | 2.31 |
Largeur de l’image | 2 258 px |
Hauteur de l’image | 1 558 px |
Bits par composante |
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Hauteur | 1 558 px |
Largeur | 2 258 px |
Composition des pixels | RVB |
Nombre de composantes | 3 |
Résolution horizontale | 25,4 pt/po |
Résolution verticale | 25,4 pt/po |
Coordonnées de contact | outreach@stsci.edu
3700 San Martin Drive 21218 Baltimore, MD USA |
Auteur | Space Telescope Science Institute Office of Public Outreach |
Mots-clés | WR 140 |
Titre court |
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Crédit ou fournisseur | NASA, ESA, CSA, STScI |
Source | STScI |
Date et heure de la numérisation | 5 août 2022 à 10:20 |
Date de la dernière modification des métadonnées | 6 octobre 2022 à 05:44 |
Identifiant unique du document original | 5898623F7744517D986D2B87632022EB |
Conditions d’utilisation | |
Date et heure de génération des données | 12 septembre 2022 à 00:00 |
Date de modification du fichier | 5 octobre 2022 à 14:00 |