3 ms·
I have been wondering, how does the scale of color shifting relate to the red-shift present in deep-field subject? Idly wondering: are the furtherest objects
by aaroninsf 4y ago
I have been wondering,
how does the scale of color shifting relate to the red-shift present in deep-field subject?
Idly wondering: are the furtherest objects being captured, so red-shifted, that the translation for human viewing done in these images more or less balances that out, so what we see in the translated images for some thickness of distance-bubble, is what we would see from a much closer perspective with the naked eye, akin to "true color." (I.e. so close that the relative red-shift would be insignificant...)
- deleted 4y ago[deleted]
- Retric 4y agoIt’s not a 1:1 color mapping to correct for red shifting. Each color represents a wavelength, but the mapping is arbitrary and chosen to maximize contrast.
- dredmorbius 4y agoI'm suspecting that there's no hard rule for what colours are assigned to what frequencies, though "more red" in processed images probably corresponds to "longer wavelengths" in captured imaging data. There's no specific red-shift interpretation, though for viewing of distant objects (and galaxies particularly which have reasonably uniform emission spectra) "redder" -> "more distant, receding faster". What you'd want to see specifically are the emission spectra showing absorption lines for well-known spectral bands. This shows specifically how red-shifted the light is, and is how red-shift was initially detected. I doubt that there's an intentional mapping of red-shifted appearance + spectral sensitivity to near-and-unadjusted appearance. Though that might be possible. In practice, I suspect the bands JWST is receiving don't map well to the RGB sensitivity of the human eye, but insteat JWST's sensitivity is tuned to scientific interests and value.