This composite image shows visible light (green), neutral Hydrogen
gas (blue), and 1.4 GHz radio continuum (red) emission. The bright
galaxies UGC 813 (center) and UGC 816 (left) appear white because they
emit at all three wavelengths. They were normal disk galaxies that
collided face-on at a speed of about 500 km/sec around 50 million
years ago. Their disks have already passed through each other and are
now separating. The galaxies are connected by a bridge containing
magnetic fields and relativistic electrons which were stripped from
their disks and still produce radio continuum emission (red). This
"cosmic crash test" tells us about the collision itself and about
normal galaxies via their response to such a collision.
Investigator(s): J. J. Condon, G. Helou, and T. H. Jarrett
This image is available in the following downloadable versions:
- 576 x 419
- 1050 x 764
- 2400 x 1746
If you would like to obtain a higher resolution version of this image,
please contact .
- Read the
- Up one level for more info on
- For unfamiliar terms, visit the NRAO
|
Telescope
|
VLA
|
|
Date of Observation
|
2001-07-27
|
|
Type of Observation
|
Spectral Line Observations
|
|
Wavelength
|
21 cm
|
|
Species
|
HI
|
|
Center of Image
|
RA: 01:16:16.54, Dec: 46:44:24.20 (J2000)
|
|
Field of View
|
0.0667 x 0.1000 degrees
|
|
Technical Caption
|
|
- Astronomical database entries for UGC813
- Query for images of UGC813
- Query for more UGC813 data
SEARCH THE IMAGE GALLERY
To search the Image Gallery for other images of UGC813, click the Submit button.
To search the Image Gallery for similar images, click the Submit button.
For more search options, please use our form.
|
