Image:Milky Way Arms.svg
Un article de Wikipédia, l'encyclopédie libre.
Milky_Way_Arms.svg (Fichier SVG, résolution de 614 × 580 pixels, taille : 186 Kio)
| Ce fichier provient de Wikimedia Commons?. Les informations le concernant sont affichées ci-dessous (procédure). |
Contents |
[edit] Description
A "God's view" map of Milky Way as seen from far Galactic North (in Coma Berenices). The star-like lines center in a yellow dot representing the position of Sun. The spokes of that "star" are marked with constellation abbreviations, "Cas" for "Cassiopeia", etc. The spiral arms are colored differently in order to highlight what structure belongs to which arm. HII regions are marked as dots colored in the same color as their spiral arm. They come in three sizes, measured by the excitation parameter U:
- small - U > 200 pc cm-2
- medium - 200 > U > 110 pc cm-2
- large - 110 > U > 70 pc cm-2
[edit] Summary
| Description |
A redevelopment of Image:Milky Way Arms-Hypothetical.png: details about method below. |
|
|---|---|---|
| Source |
User:YUL89YYZ, User:Ctachme, Kevin Krisciunas, Bill Yenne: "The Pictorial Atlas of the Universe", page 145 (ISBN 1-85422-025-X) and µOR. |
|
| Date |
08:58, 9 June 2007 (UTC) |
|
| Author | ||
| Permission (Reusing this image) |
see below |
|
| Other versions |
|
[edit] Method
The original image, Image:Milky Way Arms-Hypothetical.png, was dloaded and rotated by gimp, so that Sun is up, as is custom on Milky Way "God's view" maps. The image is then saved and imported into inkscape, and used as a template for vector editing by hand. Thereafter added:
| a. | 30° sectors around Sun, named for constellation in that direction in the galactic plane, | dbl check! |
|---|---|---|
| b. | names for MW arms as per YUL89YYZ/Ctachme | Checked with [1][2][3] |
| c. | HII-regions registered by radio and optical, as per Krisciunas/Yenne, | secondary sources |
| d. | center of galaxy and galaxy bar, | Checked with [1] |
| e. | intensity maxima of arms, as per Krisciunas/Yenne | secondary sources |
[edit] References
- ↑ a b Momany, Zaggia, Gilmore, Piotto, Carraro, Bedin, Angeli, A&A press release, Released on March 16th, 2006, Last retrieved: 9 jun 2007
- ↑ Solstation.com: Outer Disk Ring?, review of a letter to New Scientist from Naomi McClure-Griffiths et al. (Both latest retrieved 9 Jun 2007)
- ↑ newscientist.com - Jenny Hogan: Milky Way spiral gets an extra arm, last retrieved 9 jun 2007
[edit] Licensing
Historique du fichier
Cliquer sur une date et une heure pour voir le fichier tel qu’il était à ce moment-là
| Date et heure | Dimensions | Utilisateur | Commentaire | |
|---|---|---|---|---|
| actuel | 9 juin 2007 à 21:21 | 614×580 (186 Kio) | Rursus | |
| 9 juin 2007 à 21:07 | 614×580 (186 Kio) | Rursus | ||
| 9 juin 2007 à 14:58 | 592×580 (183 Kio) | Rursus | ||
| 9 juin 2007 à 14:25 | 592×580 (170 Kio) | Rursus | ||
| 9 juin 2007 à 12:32 | 592×580 (201 Kio) | Rursus | ||
| 9 juin 2007 à 10:58 | 592×580 (237 Kio) | Rursus | ({{Information |Description=A redevelopment of Image:Milky Way Arms-Hypothetical.png |Source=User:YUL89YYZ, User:Ctachme, Kevin Krisciunas, Bill Yenne: "The Pictorial Atlas of the Universe", page 145 (ISBN 1-85422-025-X) and µOR. |Date=~~~~~ ) |
Pages contenant l’image
Les pages ci-dessous contiennent cette image :
