File:Gaia-plan-focal.png
Jump to navigation
Jump to search
Size of this preview: 800 × 546 pixels. Other resolutions: 320 × 218 pixels | 640 × 437 pixels | 1,024 × 699 pixels | 1,206 × 823 pixels.
Original file (1,206 × 823 pixels, file size: 246 KB, MIME type: image/png)
Captions
Captions
Add a one-line explanation of what this file represents
Summary
[edit]
| Description |
Français : Plan focal du satellite d'astrométrie Gaia de l'Agence spatiale européenne composé de 106 CCD de différents types. Un champ d'étoiles observé par le télescope 1 traverse le plan focal au fur et à mesure de la rotation de Gaia : il est analysé dans le SM (sky mapper) qui détecte les objets à étudier, en élimine certains et détermine la position et le mouvement des autres (gros plans 1 et 2) ; la deuxième colonne du SM fait un travail similaire sur le champ d'étoiles observé par le télescope 2 (gros plan 3) ; les deux images sont superposées par la suite ; seuls les pixels entourant les objets détectés sont lus dans les CCD de l'AF (Astrometic Field) et les "fenêtres" de pixels, correspondant à des rayons cosmiques détectés dans la phase précédente, sont éliminés (gros plans 4 et 5); en progressant à travers les CCD de l'AF l'image se fait plus nette ; la superposition des champs d'étoiles des deux télescopes permet de mesurer directement les angles entre étoiles très écartées (gros plans 6) ; Un spectre de l'énergie de chaque objet suivi est obtenu par les CCD BP et RP (gros plan 7) ; enfin un spectre détaillé de chaque objet est obtenu dans une bande de fréquence étroite (gros plan 8) via les CCD du RVS (Radial Velocity Spectrograph). |
| Date | |
| Source | Own work |
| Author | Pline |
|
This diagram image could be re-created using vector graphics as an SVG file. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is available, please upload it and afterwards replace this template with
{{vector version available|new image name}}.
It is recommended to name the SVG file “Gaia-plan-focal.svg”—then the template Vector version available (or Vva) does not need the new image name parameter. |
Licensing
[edit]
I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:28, 8 December 2013 | | 1,206 × 823 (246 KB) | Pline (talk | contribs) | + phase de renforcement de l'image |
| 11:21, 7 December 2013 |  | 1,198 × 823 (234 KB) | Pline (talk | contribs) | arrière plan plus foncé | |
| 11:18, 7 December 2013 |  | 1,198 × 823 (234 KB) | Pline (talk | contribs) | arrière plan plan focal | |
| 10:39, 7 December 2013 |  | 1,198 × 823 (231 KB) | Pline (talk | contribs) | + image télescope 2 | |
| 09:56, 7 December 2013 |  | 1,198 × 823 (224 KB) | Pline (talk | contribs) | correction erreur rayon gamma | |
| 09:40, 7 December 2013 |  | 1,198 × 823 (221 KB) | Pline (talk | contribs) | User created page with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
- Usage on de.wikipedia.org
- Usage on fr.wikipedia.org
- Usage on ro.wikipedia.org
- Usage on ru.wikipedia.org
- Usage on uk.wikipedia.org
