A polar view of the Andromeda Galaxy |
A polar view of the Andromeda Galaxy |
Jul 27 2024, 03:46 PM
Post
#1
|
|||
Member Group: Members Posts: 100 Joined: 30-November 05 From: Antibes, France Member No.: 594 |
I've generated a polar view of the Andromeda Galaxy on the basis of a mosaic of that galaxy composed of infrared data acquired with the Spitzer Space Telescope. The mosaic was proposed on October 13th, 2005.
The Andromeda Galaxy is highly inclined relative to the normal of the projection Earth/core of the Andromeda Galaxy (approximately 77 degrees). The polar view of the Andromeda Galaxy allows a comparison with our own galaxy the Milky Way. One can clearly notice that both galaxies represent barred spiral galaxy and that the Andromeda Galaxy has a complexe structure related to the gravitational influence of other objects in particular. Here is the outcome with the Milky Way and the Andromeda Galaxy at scale: Here is the original view of the Andromeda Galaxy in infrared (Spitzer data): And here is the link of the animation of the Andromeda Galaxy I produced: https://www.youtube.com/watch?v=p-jAt_rJPF8 |
||
|
|||
Jul 27 2024, 09:34 PM
Post
#2
|
|
Senior Member Group: Members Posts: 4257 Joined: 17-January 05 Member No.: 152 |
It's nice to see the deprojected view. But the evidence for the bar is quite subtle, since deprojecting will tend to stretch a circularish blob into an elongated bar-like shape. See this paper for all the gory details.
|
|
|
Jul 29 2024, 01:36 PM
Post
#3
|
|
Member Group: Members Posts: 100 Joined: 30-November 05 From: Antibes, France Member No.: 594 |
It's nice to see the deprojected view. But the evidence for the bar is quite subtle, since deprojecting will tend to stretch a circularish blob into an elongated bar-like shape. See this paper for all the gory details. Thanks Fred for your feedback and the relevant link. The entire view of the original mosaic was deprojected so that the deprojection process was also applied to stars or nebulae from our galaxy or to faraway galaxies which are in the field of view of the galaxy. Any star that undergoes deprojection will be elongated in the final view. One can imagine that the perspective view (the original mosaic) hides a portion of the arms on the other side of the Andromeda Galaxy. Regarding the core of the galaxy, the barred structure is not obvious in the infrared mosaic based on Spitzer data. I note however that the vertical dimension is relatively significant compared to the horizontal dimension. I trust the 3D software (Blender) in generating the polar view of the Andromeda Galaxy. The old computer I used had to work hard to produce the 1000 frames (25 frames per second) of the deprojection/zoom process in the animation (up to 6 minutes per frame that is to say the equivalent of 3 or 4 days of intensive work for the computer ! ). |
|
|
Lo-Fi Version | Time is now: 7th October 2024 - 05:22 PM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |