File:Active Nucleus of NGC 3393.png
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Size of this preview: 800 × 577 pixels. Other resolutions: 320 × 231 pixels | 640 × 462 pixels | 1,024 × 739 pixels | 1,280 × 923 pixels | 2,508 × 1,809 pixels.
Original file (2,508 × 1,809 pixels, file size: 8.5 MB, MIME type: image/png)
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:11, 11 March 2018 | | 2,508 × 1,809 (8.5 MB) | commons>Fabian RRRR | =={{int:filedesc}}== {{Information |Description=I'm still on a roll with the active galactic nuclei (AGN) and here is the latest, with thanks to Mitchell Revalski et al. for the list of interesting objects to investigate. I had the usual trouble with this one trying to balance the colors while making the illuminated filaments easy to discern. In many galaxies, the details near the nucleus are not so important to convey, and it is therefore ok if it's all a bright ball. Here, the image is quite dark to accommodate the details in the core. We're quite used to seeing spiral galaxies with uniformly yellowish cores full of old stars, so when something blue or green is spotted, it seems a bit odd, and that's one of the ways astronomers can find these fascinating galaxies. Such nuances are picked out relatively easily by comparing spectroscopic results from many different galaxies. Spectroscopy is kind of like a fingerprint in light, and whatever spikes and dips in the graph appear tell a... |
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