All Questions
Tagged with quasars spectroscopy
5
questions
9
votes
1
answer
581
views
What does "Effective radius of [CII] line is 1.4 kpc" mean?
A recent paper (A dusty compact object bridging galaxies and quasars at cosmic dawn) describes one of their results as the "Effective radius of [CII] line" (Extended Data Table 2, p38):
I ...
- 2,600
4
votes
2
answers
176
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How to interpret this spectrum of the "new DESI Quasar at z = 6.53"; what causes the big edge at about 9150 Angstroms?
I'm not exacty sure why but Scitech Daily's Seeing Dark Energy’s True Colors: DESI Creates Largest 3D Map of the Cosmos includes the graphic and caption below.
It indicates a quasar in a Hubble image ...
- 30.7k
2
votes
1
answer
66
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Radio SEDs for quasars
Using data from https://ned.ipac.caltech.edu/, I can get nice-looking spectral energy distributions for quasars, such as for these two:
but most of their points are in UV to IR range. I'm looking ...
- 2,600
2
votes
0
answers
76
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Correction to inverse square law for cosmology
While reading about the discovery of quasars and the spectroscopic analysis of 3C 273 in this paper by Maarten Schmidt, I came across the following quote:
At these distances, corrections to ...
- 2,600
0
votes
1
answer
332
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Extraction of error spectrum in Sloan Digital Sky Survey
I need to know does SDSS spectrum contains error spectrum as well?
http://www.sdss.org/dr12/spectro/spectro_basics/#AbouttheSpectra
The above link says, further HDU's contain error spectrum and than ...
