I have H alpha spectra of H II regions in our galaxy. In the paper, the x-axis is in units of km/s and the corresponding line width as well. From this, how can I get equivalent width of the H alpha line?
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$\begingroup$ $v = c\Delta \lambda/\lambda_0$ $\endgroup$– ProfRobNov 15, 2020 at 21:58
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$\begingroup$ It would be much better if you mentioned and linked to the paper and gave the actual value of the line width in km/s. The comment above works to first order, but if it's really wide the answer could turn out to be more interesting! $\endgroup$– uhohNov 17, 2020 at 3:39
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$\begingroup$ @uhoh- Thank You for replying. The link for the paper I am looking at is link. I needed to know the H alpha equivalent width of the H2 regions in units of wavelength. Am I missing something here? $\endgroup$– user1796Nov 17, 2020 at 16:20
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