Astronomers look at the Andromeda Galaxy in many wavelengths
Click for full images.
Astronomers using both old and new and ground- and space-based telescopes have created a full set of observations of the Andromeda Galaxy (also known as M31) across five different wavelengths, producing one of the most complete views of the galaxy so far.
This new composite image contains data of M31 taken by some of the world’s most powerful telescopes in different kinds of light. This image includes X-rays from NASA’s Chandra X-ray Observatory and ESA’s (European Space Agency’s) XMM-Newton (represented in red, green, and blue); ultraviolet data from NASA’s retired GALEX (blue); optical data from astrophotographers using ground based telescopes (Jakob Sahner and Tarun Kottary); infrared data from NASA’s retired Spitzer Space Telescope, the Infrared Astronomy Satellite, COBE, Planck, and Herschel (red, orange, and purple); and radio data from the Westerbork Synthesis Radio Telescope (red-orange).
Each type of light reveals new information about this close galactic relative to the Milky Way. For example, Chandra’s X-rays reveal the high-energy radiation around the supermassive black hole at the center of M31 as well as many other smaller compact and dense objects strewn across the galaxy.
The contrast in emissions between different wavelengths is certainly striking. The radio, infrared, and ultraviolet data clearly delineate the galaxy’s arms where star formation is occurring. The X-ray highlights the galaxy’s central black hole.
This press release is clearly intended to lobby against the cuts at NASA, especially considering that several of these images (Galax, Spitzer) are not new. At the same time, it does demonstrate the need to look at the heavens across the entire electromagnetic spectrum. It seems to me that the astronomical community should begin to consider other methods of funding for this work, other than just the federal government, and in fact they prove this point themselves by the use of images above from some smaller ground-based telescopes not funded by American tax dollars.
Click for full images.
Astronomers using both old and new and ground- and space-based telescopes have created a full set of observations of the Andromeda Galaxy (also known as M31) across five different wavelengths, producing one of the most complete views of the galaxy so far.
This new composite image contains data of M31 taken by some of the world’s most powerful telescopes in different kinds of light. This image includes X-rays from NASA’s Chandra X-ray Observatory and ESA’s (European Space Agency’s) XMM-Newton (represented in red, green, and blue); ultraviolet data from NASA’s retired GALEX (blue); optical data from astrophotographers using ground based telescopes (Jakob Sahner and Tarun Kottary); infrared data from NASA’s retired Spitzer Space Telescope, the Infrared Astronomy Satellite, COBE, Planck, and Herschel (red, orange, and purple); and radio data from the Westerbork Synthesis Radio Telescope (red-orange).
Each type of light reveals new information about this close galactic relative to the Milky Way. For example, Chandra’s X-rays reveal the high-energy radiation around the supermassive black hole at the center of M31 as well as many other smaller compact and dense objects strewn across the galaxy.
The contrast in emissions between different wavelengths is certainly striking. The radio, infrared, and ultraviolet data clearly delineate the galaxy’s arms where star formation is occurring. The X-ray highlights the galaxy’s central black hole.
This press release is clearly intended to lobby against the cuts at NASA, especially considering that several of these images (Galax, Spitzer) are not new. At the same time, it does demonstrate the need to look at the heavens across the entire electromagnetic spectrum. It seems to me that the astronomical community should begin to consider other methods of funding for this work, other than just the federal government, and in fact they prove this point themselves by the use of images above from some smaller ground-based telescopes not funded by American tax dollars.
