Atomic Gas in Fornax A

https://www.nrao.edu/archives/plugins/Dropbox/files/n1316HI_med.jpg

Description

VLA atomic hydrogen of the central dominant galaxy of the Fornax Cluster, Fornax A (a.k.a. NGC 1316). The gas is shown as blue contours on an optical image from the Digital Sky Survey. The main body of the Fornax A is typical of early type galaxies, but at fainter light levels the galaxy exhibits a peculiar morphology, with many shells, ripples and loops. The VLA spectral line observations show gas associated with the galaxy NGC 1317 just to the north, the barred galaxy NGC 1310 to the west, and in several small clounds around the main body of NGC 1316. Its possible that the gas clouds are left over from a merger event which fueled the central radio source.
Radio data are VLA DnC-array observations at 54"x43" resolution. HI contours start at a level of 2x10<sup>19</sup> atoms cm<sup>-2</sup>, with successive contours a factor of two higher.

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

NGC1316

Photographer

Image by J. Hibbard

Investigators

C. Horellou, J. Black, J. van Gorkom, F. Combes, J. van der Hulst, V. Charmandaris

Telescope

Very Large Array (VLA)

Observation Date

1985-10-19

Type of Observation

spectral line

Wavelength

21 cm

Frequency

1420.4 MHz

Species

HI

Center of Image

RA 3:22:10.300, Dec: -37:12:12.000 (J2000)

Field of View

0.550000 x 0.450000 degrees

Link to journal article

Series

Galaxies Series

Unit

Early-type Unit

Citation

Legacy Astronomical Images, “Atomic Gas in Fornax A,” NRAO Archives, accessed December 7, 2021, https://www.nrao.edu/archives/items/show/33543.