Questions tagged [h-alpha]

Questions about the spectral line at 656.28 nm in the Balmer series called H-alpha or H$\alpha$.

Filter by
Sorted by
Tagged with
7 votes
2 answers
70 views

When was H-alpha first used to observe the universe?

The H-alpha line is used by astronomers to trace the presence of hydrogen in galaxies or to view protuberances on the Sun. When was the H-alpha emission of astronomical objects such as galaxies first ...
user avatar
  • 16.7k
1 vote
0 answers
40 views

H alpha - double peak (Be star)

What is the double peak in this case, please? What does the third mean? Many thanks
user avatar
1 vote
1 answer
157 views

How to isolate H$_\alpha$ from Nitrogen doublet emission lines

I am trying to find out line intensity and FWHM of H$_\alpha$6565 emission line from a quasar spectrum obtained from SDSS DR-14Q. Visual inspection of spectrum shows H$_\alpha$ being contaminated with ...
user avatar
4 votes
1 answer
130 views

Any simple experiment with an H-alpha telescope?

Is there any simple experiment that can be done with an H-alpha telescope, for example to estimate the Sun's mass, size, distance, temperature or intensity? I give lessons about renewable energy and ...
user avatar
  • 1,105
2 votes
2 answers
709 views

about H$_\alpha$ and H$_\beta$ lines in astronomical objects' spectra

Generally there may be some line ratio between the two lines. If H$\alpha$ is strong, it is quite possible we can see H$_\beta$ too. Is it possible we can see H$_\beta$, but can not see H$_\alpha$? ...
user avatar
  • 2,945
3 votes
0 answers
67 views

H-alpha velocity fields of spirals falling into a cluster

What kind of impact would you expect ram pressure stripping / tidal interactions / harassment / interactions with the cluster potential (etc!) to have on the h-alpha velocity fields of infalling ...
user avatar