Please login in order to download photos in full size
If you are not registered, please register for free: www.Free-Photos.biz/register
Please note to download premium images you also need to join as a free member..
You can also save the photos without the registration - but only in small and average sizes, and some of them will have the site's watermark. Please simply click your right mouse button and save the image.
Please login in order to like photos
If you are not registered, please register for free:
Sorry, non-members can download up to 100 full-size photos per month.
It looks like you have used up your limit.
Free members can download an unlimited number of full-size photos - including the premium free photos.
Join as a member today for FREE! - and download the images without limitations:
www.Free-Photos.biz/membership.php
You can also save the images without the membership - but only in small and average sizes, and some of them may have the site's watermark. Please simply click your right mouse button and save the image.
|
This is a premium free photo
This photo was viewed 3 times and was downloaded in full size 1 times.
This photo was liked 0 times
If you are a member, please login in order to see the source link of the above image.
Summary
Description |
English: These two images show "stacked" Chandra images for two different classes of distant, massive galaxy detected with Spitzer. Image stacking is a procedure used to detect emission from objects that is too faint to be detected in single images. To enhance the signal, images of these faint objects are stacked on top of one another.
In both images, low-energy X-rays are shown in orange and high-energy X-rays in blue, and the stacked object is in the center of the image (the other sources beyond the center of the image are X-ray sources that were directly detected and are not part of the source stacking). On the left is a stacked Chandra image of the "normal" galaxies seen with Spitzer. The infrared emission for these young, massive galaxies is consistent with expectations for star formation. The Chandra image shows mainly low-energy X-ray emission at the center as expected. On the right, is a stacked Chandra image for galaxies with infrared emission exceeding the levels likely to be caused by star formation. These galaxies contain active galactic nuclei, or quasars, in their centers. These are luminous objects powered by the rapid growth of supermassive black holes. The obscured quasars show much higher levels of high-energy X-ray emission because the less energetic X-rays are mostly absorbed by gas. |
Date | |
Source | https://www.spitzer.caltech.edu/images/2668-ssc2007-17b-Stacks-of-Light |
Author | NASA/CXC/Durham/D.Alexander et al. |
Image use policy: https://www.spitzer.caltech.edu/info/18-Image-Use-Policy
Licensing
This file is in the public domain because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
|
|
Warnings:
|
Public Domain
EXIF data: | |
File name | stacks_of_light.jpg |
---|---|
Size, Mbytes | 3.0398154296875 |
Mime type | image/jpeg |
Orientation of image | 1 |
Image resolution in width direction | 300 |
Image resolution in height direction | 300 |
Unit of X and Y resolution | 2 |
Color space information | 65535 |
Exif image width | 5100 |
Exif image length | 2550 |
Software used | Adobe Photoshop CS3 Macintosh |
Copyright holder | 0 |
While the copyright and licensing information supplied for each photo is believed to be accurate, Free-Photos.biz does not provide any warranty regarding the copyright status or correctness of licensing terms. If you decide to reuse the images from Free-Photos.biz, you should verify the copyright status of each image just as you would when obtaining images from other sources.
The use of depictions of living or deceased persons may be restricted in some jurisdictions by laws regarding personality rights. Such images are exhibited at Free-Photos.biz as works of art that serve higher artistic interests.
PRIVACY POLICY
By registering your account and/or by subscribing to new and newly rated photographs you agree we may send you the links to photos and we may occasionally share other information with you.
We do NOT disclose your personal data.