Questions about the observed frequency range of the electromagnetic radiation of a celestial object.
Questions about the observed frequency range of the electromagnetic radiation of a celestial object.
Questions tagged [spectra]
179 questions
13
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1 answer
What is the Lyman Alpha forest Used For?
The Lyman-alpha forest is an interesting feature found in the spectra of sufficiently distant objects. This series of absorption lines extends over a range of frequencies, and are a result of the Lyman-alpha electron transition of neutral hydrogen…
astromax
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2
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1 answer
Invisible in visible light but visible in non-visible light?
This may be a stupid question, but I've been wondering this for a while and haven't yet found a solid answer. I'm worried the answer will be something along the lines of "of course not, you dummy" but it's bothering me and I haven't found the answer…
duzzy
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2
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1 answer
What type of spectrum does the Wolf-Rayet star WR137 have?
Is it an Emission Spectra or an Absorption Spectra?
I think that it's an absorption spectrum, but then why is the light intensity curve focused on elements that should not be in the star in this case, like the carbon at position 4658?
PS: I do not…
evgeni fotia
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2
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1 answer
Question regards to Kirchhoff’s Laws (of spectroscopy)
In the book "Horizons: exploring the universe-Cengage learning (2018)", page 210, it states that:
Observational evidence can tell you how nova explosions occur. As the explosion begins, spectra show blueshifted absorption indicating that the gas is…
Jack the Ranger
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Spectra from Temperature and Emission Measure
Having the solar flare fluxes on the two bands of GOES (0.05-0.4 nm and 0.1-0.8 nm) I need to calculate the flux between 0.05 and 0.2 nm.
2
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2 answers
How to tell whether an optical spectrum is featureless or just with a low S/N?
A featureless spectrum and a spectrum low S/N are very similar.
Is there a way to tell the difference between them?
questionhang
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0
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.mt file convert to .fits/.ascii/.dat
How to convert .mt file with a spectrum to a more convenient format, please? I am able to display that in fv: Fits Viewer, but I am lost in converting. Thank you
Elena Greg
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