NGC 6814 from Hubble

Together with irregular galaxies, spiral galaxies make up approximately 60 percent of the galaxies in the local universe. However, despite their prevalence, each spiral galaxy is unique — like snowflakes, no two are alike. This is demonstrated by the striking face-on spiral galaxy NGC 6814, whose luminous nucleus and spectacular sweeping arms, rippled with an intricate pattern of dark dust, are captured in this NASA/ESA Hubble Space Telescope image.

NGC 6814 has an extremely bright nucleus, a telltale sign that the galaxy is a Seyfert galaxy. These galaxies have very active centers that can emit strong bursts of radiation. The luminous heart of NGC 6814 is a highly variable source of X-ray radiation, causing scientists to suspect that it hosts a supermassive black hole with a mass about 18 million times that of the sun.

As NGC 6814 is a very active galaxy, many regions of ionized gas are studded along its spiral arms. In these large clouds of gas, a burst of star formation has recently taken place, forging the brilliant blue stars that are visible scattered throughout the galaxy.

Text credit: https://www.nasa.gov/image-feature/goddard/2016/hubble-spies-a-spiral-snowflake

Image:

Click for full resolution

Details:

All data was taken by Hubble’s wide field camera from the following proposal: https://archive.stsci.edu/proposal_search.php?mission=hst&id=12961

Red: 160w
Green: 814w
Blue: 55w

Processing:

  • Integrate all channels
  • Create superlum
  • combine and color calibrate RGB
  • deconvolute Lum
  • Denoise Lum
  • Stretch Lum and RGB
  • Combine L and RGB
  • Curves transformation
  • MMT and Curves transformation
  • Unsharp Mask

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