Interacting Group Arp 313

https://www.nrao.edu/archives/plugins/Dropbox/files/Wilcot3_hi.jpg

Description

A collection of radio and optical images of the interacting group of galaxies Arp 313, composed of the galaxies NGC 3991, NGC 3994, and NGC 3995. Clockwise (from the upper left panel) are the distribution of total atomic hydrogen (HI) shown as contours and greyscales; the velocity distribution of the HI contoured upon the total HI map; color-coded HI velocity field (red indicates gas which is moving away from us, blue gas that is moving towards us); and the total HI map contoured upon an optical image from the Digital Sky Survey. The extended distribution of the neutral hydrogen indcates that the galaxies in this group have interacted, throwing the gas which was originally within the disks of the spirals far out into intergalactic space.
Contour levels on the total HI maps are 0.24, 0.6, 1.2, 2.4, 4.8, and 9.6 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.

Creator

Legacy Astronomical Images

Rights

NRAO/AUI/NSF does not hold full copyright for this image. Contact the archivist for details.

Type

Legacy Astronomical Image

Object Name

Arp 313

Investigators

E. M. Wilcots, M. K. Prescott

Telescope

Very Large Array (VLA)
DSS

Observation Date

2002-00-00

Type of Observation

spectral line

Wavelength

21 cm

Frequency

1420.4 MHz

Species

HI

Center of Image

RA 11:57:44.120, Dec: 32:17:38.300 (J2000)

Field of View

0.300000 x 0.300000 degrees

Link to NRAO Newsletter article

Notes

Contact the archivist for a high resolution tif of this image.

Series

Galaxies Series

Unit

Peculiar Unit

Citation

Legacy Astronomical Images, “Interacting Group Arp 313,” NRAO/AUI Archives, accessed March 29, 2024, https://www.nrao.edu/archives/items/show/33551.