<p>I have a galaxy for which I have HI column density values. I want to estimate the corresponding HI mass. To do the same, I want to estimate the flux density of this source. How can I achieve the same?</p>
<p>The equation to estimate the HI mass from HI flux density:</p>
<p><span class="math-container">$$M_\mathrm{HI}=2.36×10^5D^2\textstyle\int F\,\mathrm{d}V \ M_\odot$$</span></p>

CC BY-SA 4.0
2023-04-28T10:14:19.907Z
What have you tried so far? How do you think to get F out of the integral?
AtmosphericPrisonEscape
CC BY-SA 4.0
2023-05-04T16:22:21.447Z
You *have* a galaxy? :)
Deko Revinio
<radio>
HI mass from HI column density
SlightDecoy
# HI mass from HI column density

(Asked by: username_0 on 2023-04-28)

I have a galaxy for which I have HI column density values. I want to estimate the corresponding HI mass. To do the same, I want to estimate the flux density of this source. How can I achieve the same?

The equation to estimate the HI mass from HI flux density:

$$M\_\mathrm{HI}=2.36×10^5D^2\textstyle\int F\,\mathrm{d}V \ M\_\odot$$

**Tags:** radio

> **Comments:**
> **username_1**: What have you tried so far? How do you think to get F out of the integral?  
> **username_2**: You *have* a galaxy? :)  

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## 0 answers

