New answers tagged spectra
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Stellar classification spectral lines: chemical abundance vs temperature
Both explanations are right. The strength of an absorption line does depend on the abundance of a chemical element in the photosphere. But it also does depend on the temperature of the photosphere.
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How to do logarithmic wavelength binning (in Python) in order to find redshift?
I know you probably want to do and understand it yourself - Brian's answer is fine in that regard - but sometimes why reinvent the wheel?
This is a standard task implemented in the specutils python ...
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How to remove redshift from galaxy spectra in Python?
Yes, there are two ways (at least).
Do a pixel by pixel cross-correlation of the galaxy and template spectrum. The cross-correlation function will have a broad peak, and the position of the peak is ...
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Stellar classification spectral lines: chemical abundance vs temperature
It's in a state of superposition coherence which means both
Luminosity is proportional to the temperature (which is technically ionization) via the stefan-boltzmann law. So the temperature also ...
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What causes the Balmer Jump?
The Balmer break comes from a combination of two main things: the ability of photons with high enough energies (wavelengths shorter than 364.5 nm) to ionize hydrogen atoms that are in the $n = 2$ ...
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What causes the Balmer Jump?
I don't quite understand your plot (does "grey" mean "blackbody"?), but I think you've stated what's going on pretty clearly (I'm reading Fundamental Astronomy by Karttumen et al ...
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How do amateur astronomers do stellar spectroscopy?
Ad 1) There are multiple options:
A diffraction grating in transmission like the StarAnalyzer 100 or 200, that are conveniently framed in a 1.25“ ring, so it can be attached to a standard ocular.
A ...
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Reduced chi square value
Should I expect a decrease in the reduced chi-square values with increasing n?
You should see a decrease up to the point where you start overfitting -- assuming that your assumption that the correct ...
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Reduced chi square value
The chi-squared should always decrease as you increase the complexity of the model (in this case by increasing the number of polynomial terms). The reduced chi-squared may decrease or increase, ...
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