[an error occurred while processing this directive] Herschel 400 Catalogue <http://antwrp.gsfc.nasa.gov/apod/ap060630.html>
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Astr110 Photography Projects, Spring 2010

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Antennae Galaxies, Katie Holtrop

Antennae Galaxies

The Antennae Galaxies (aka NGC 4038/NGC 4039) are a pair of spiral galaxies colliding with each other. Although not visible in this photo, two long arcs of gases and debris extend up and down from the centers, giving the appearance of antennae. (Also sometimes called the "Rattail" galaxies.) Discovery is attributed to William Herschel, who noted them in the constellation Corvus. Recent research has found that these galaxies are only 45 million light years away instead of the previously thought 60-65 million ly.

In this photo, the arms of each galaxy are visible, along with their cores (appearing as yellow dots). The clouds around the cores are a mixture of molecular gas/dust and new star clusters, and the pinkish color comes from hydgrogen gas. Angular size from the top of the larger galaxy to the bottom of the other is 1.86 arcminutes, and linear size is approximately 24 thousand ly.

 

References:

Astronomy Picture of the Day <http://antwrp.gsfc.nasa.gov/apod/ap060630.html>

File:Antennae Galaxies xl.jpg <http://en.wikipedia.org/wiki/File:Antennae_galaxies_xl.jpg>

Herschel 400 Catalogue <http://en.wikipedia.org/wiki/Herschel_400_Catalogue>

Science Daily, "Merging Antennae Galaxies Move Closer"
<http://www.sciencedaily.com/releases/2008/05/080509101622.htm>

The RASC's Finest N.G.C. Objects List <http://www.seds.org/messier/xtra/similar/rasc-ngc.html>

 

 

Right Ascension (J2000) 12:01:52.8
Declination (J2000) -18:51:54
Filters used blue(B), green(V), red(R), and clear(C)
Exposure time per filter 10x30 seconds in CBVR
Date observed

March 13, 2010