HI Disk of NGC 2403

https://www.nrao.edu/archives/plugins/Dropbox/files/hi_disk_ngc2403_hi.jpg

Description

NGC 2403 is a well-known spiral galaxy in the northern sky. Galaxies such as NGC 2403 contain, apart from billions of stars that are visible in the right image, a large disk of hydrogen gas. This gas emits radio waves that can be detected with radio telescopes. The image on the left shows, on the same scale as the optical image, the hydrogen disk of NGC 2403 as observed with the VLA C array. Seen on the sky, the size of this gas disk is about the same as that of the full moon. The images shows that the gas disk extends well beyond the optical galaxy. The gas disk shows the spiral structure of the disk, as well as large holes created by large supernova explosions.
Right: optical image of NGC 2403 based on images taken from the Digitized Sky Survey. The image on the left shows the total HI image of the gas disk of the spiral galaxy NGC 2403. The radio image is based on deep observations with the VLA C array (total integration time 48 hr) and covers an area of about 40 arcmin x 40 arcmin.

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

NGC 2403

Photo Credit

Tom Oosterloo, Astron, The Netherlands

Investigators

Fraternali, Oosterloo, Sancisi

Telescope

Very Large Array (VLA)

Type of Observation

spectral line

Center of Image

RA 7:36:51.000, Dec: 65:0:0.000 (J2000)

Field of View

0.666667 x 0.666667 degrees

Link to journal article

Notes

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

Series

Galaxies Series

Unit

Spiral Unit

Citation

Legacy Astronomical Images, “HI Disk of NGC 2403,” NRAO Archives, accessed December 3, 2021, https://www.nrao.edu/archives/items/show/33577.