Dwarf Galaxy NGC 3664
A collection of radio and optical images of NGC 3664 (galaxy on the top) and its dwarf companion NGC 3664A (blob at the bottom). NGC 3664 is a peculiar barred dwarf spiral, also known as Arp 5. Its optical morphology reveals a single spiral arm emerging from the end of an optical bar. Clockwise (from the upper left panel) are the distribution of total atomic hydrogen (HI) (contours and greyscales); the velocity distribution of the HI contoured on a greyscale of the total HI map; color-coded HI velocity field (red indicates gas which is moving away from us, blue indicates gas that is moving towards us); and the total HI map contoured upon an optical image taked from the Digital Sky Survey.
Contour levels on the total HI maps are 0.4, 0.8, 1.6, 3.2, 6.4, and 12.8 x 10<sup>20</sup> cm<sup>-2</sup>. The gray scales in the first two panels are in units of 10<sup>20</sup> cm<sup>-2</sup>. The color-coded velocity scale in panel 3 is in units of kilometers per second.
Legacy Astronomical Images
NRAO/AUI/NSF does not hold full copyright for this image. Contact the archivist for details.
Legacy Astronomical Image
E. M. Wilcots, M. K. Prescott
Very Large Array (VLA)
Type of Observation
Center of Image
RA 11:24:25.050, Dec: 3:19:33.800 (J2000)
Field of View
0.300000 x 0.300000 degrees
Contact the archivist for a high resolution tif of this image.
Legacy Astronomical Images, “Dwarf Galaxy NGC 3664,” NRAO Archives, accessed December 3, 2021, https://www.nrao.edu/archives/items/show/33537.