Image:Milky Way Arms.svg

Wikipedia طرفان

Milky_Way_Arms.svg (ايس وي جي فائيل، اٽڪل 614 × 580 عڪسلون، فائيل سائيز: 186 KB)

هيءَ هڪ شراڪتي چاڙهه آهي، تنهنڪري ان کي ٻيون رٿائون به استعمال ڪري سگھن ٿيون.

The description on its file description page on the shared repository is shown below.

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:

  1. small - U > 200 pc cm-2
  2. medium - 200 > U > 110 pc cm-2
  3. 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

User:Rursus

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

  1. a b Momany, Zaggia, Gilmore, Piotto, Carraro, Bedin, Angeli, A&A press release, Released on March 16th, 2006, Last retrieved: 9 jun 2007
  2. Solstation.com: Outer Disk Ring?, review of a letter to New Scientist from Naomi McClure-Griffiths et al. (Both latest retrieved 9 Jun 2007)
  3. newscientist.com - Jenny Hogan: Milky Way spiral gets an extra arm, last retrieved 9 jun 2007

[edit] Licensing

I, the copyright holder of this work, hereby publish it under the following license:
GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation license, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation license".

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فائيل جي سوانح

ڪنهن به تاريخ/وقت تي ڪلڪ ڪري ڏسندا ته تڏڻي اهو فائيل ڪيئن هو.

تاريخ/وقتماپَيُوزرتاثرات
هاڻوڪو19:21, 9 جُونِ 2007614×580 (186 KB)Rursus
19:07, 9 جُونِ 2007614×580 (186 KB)Rursus
12:58, 9 جُونِ 2007592×580 (183 KB)Rursus
12:25, 9 جُونِ 2007592×580 (170 KB)Rursus
10:32, 9 جُونِ 2007592×580 (201 KB)Rursus
08:58, 9 جُونِ 2007592×580 (237 KB)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=~~~~~ )

هن فائيل سان هيٺيان صفحا ڳنڍيل آهن.