by Ann » Sun May 18, 2014 12:03 pm
I love that image - and I get a kick out of the galaxy! What a galaxy and what an image!
NGC 4485 is a quite blue galaxy (and you know what I think about that
![Wink :wink:](./images/smilies/icon_wink.gif)
).
In James D Wray's Color Atlas of Galaxies, NGC 4485 looks all green and a bit blue, with no trace of yellow at all. The colors suggest a galaxy all composed of young and intermediate-aged stars. I would be extremely surprised if there was not an underlying yellow population in NGC 4485 after all, because there appears to be practically no "newborn" galaxies in existence. In fact, there appears to be a halo of faint red stars surrounding NGC 4485, even though more of those red stars appear to be associated with NGC 4485's "dance partner": NGC 4490.
The B-V index of NGC 4485 is 0.39, and its U-B index is -.22. That's blue, indeed.
Ann
[quote="bystander"][float=left][c][url=http://www.spacetelescope.org/images/potw1419a/][b][i]ESA/HEIC: Starbursts in the wake of a fleeting romance (NGC 4485)[/i][/b][/url]
[img3="[b][i]Credit: NASA/ESA/Hubble[/i][/b]"]http://www.spacetelescope.org/static/archives/images/screen/potw1419a.jpg[/img3][/c][/float][/quote]
I love that image - and I get a kick out of the galaxy! What a galaxy and what an image! :D
NGC 4485 is a quite blue galaxy (and you know what I think about that :wink:).
In James D Wray's Color Atlas of Galaxies, NGC 4485 looks all green and a bit blue, with no trace of yellow at all. The colors suggest a galaxy all composed of young and intermediate-aged stars. I would be extremely surprised if there was not an underlying yellow population in NGC 4485 after all, because there appears to be practically no "newborn" galaxies in existence. In fact, there appears to be a halo of faint red stars surrounding NGC 4485, even though more of those red stars appear to be associated with NGC 4485's "dance partner": NGC 4490.
The B-V index of NGC 4485 is 0.39, and its U-B index is -.22. That's blue, indeed.
Ann