<p><a href="https://i.sstatic.net/WFLypWwX.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/WFLypWwX.png" alt="enter image description here" /></a></p>
<p>This is a velocity integrated picture of a molecular cloud, part of my homework. <a href="https://paste.c-net.org/AthenaMeasly" rel="nofollow noreferrer">https://paste.c-net.org/AthenaMeasly</a></p>
<p>Question:</p>
<p>For collimated bipolar outflows, the general situation is that the red-shifted and blue-shifted radio lobes are symmetrically distributed on both sides of the central object. However, in this case, the central cloud core has red and blue radio lobes seen on both sides of the star at the same time. Please qualitatively explain the most likely cause and draw a diagram.</p>
<p>I have no idea for this.</p>
<p>I can think of a bipolar outflow rotating along an axis different from the self-rotating axis, like a pulsar. And this look like this:</p>
<p><a href="https://i.sstatic.net/fzpIMmo6.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/fzpIMmo6.png" alt="enter image description here" /></a></p>
<p>But this image has 2 blueshift lobes out of 2 redshift lobes.</p>

CC BY-SA 4.0
2024-05-05T11:16:49.683Z
What, exactly, is being plotted.  I guess the grayscale pixels are visible light intensity,  but what exactly are the blue and pink contours?  Radio intensity at some particular frequency?
James K
CC BY-SA 4.0
2024-05-06T02:10:12.267Z
It is velocity integration, you can see the source code follow the link
Firestar-Reimu
CC BY-SA 4.0
2024-05-06T13:21:20.153Z
Maybe two separate outflow occurrences while polar axis changing as in the second diagram?
antlersoft
<radio-astronomy><star-formation>
Why are there red- and blue-shifted radio lobes on either side of the core for collimated bipolar outflows?
Firestar-Reimu
# Why are there red- and blue-shifted radio lobes on either side of the core for collimated bipolar outflows?

(Asked by: username_0 on 2024-05-05)

[![enter image description here](https://i.sstatic.net/WFLypWwX.png)](https://i.sstatic.net/WFLypWwX.png)

This is a velocity integrated picture of a molecular cloud, part of my homework. <https://paste.c-net.org/AthenaMeasly>

Question:

For collimated bipolar outflows, the general situation is that the red-shifted and blue-shifted radio lobes are symmetrically distributed on both sides of the central object. However, in this case, the central cloud core has red and blue radio lobes seen on both sides of the star at the same time. Please qualitatively explain the most likely cause and draw a diagram.

I have no idea for this.

I can think of a bipolar outflow rotating along an axis different from the self-rotating axis, like a pulsar. And this look like this:

[![enter image description here](https://i.sstatic.net/fzpIMmo6.png)](https://i.sstatic.net/fzpIMmo6.png)

But this image has 2 blueshift lobes out of 2 redshift lobes.

**Tags:** radio-astronomy, star-formation

> **Comments:**
> **username_1**: What, exactly, is being plotted.  I guess the grayscale pixels are visible light intensity,  but what exactly are the blue and pink contours?  Radio intensity at some particular frequency?  
> **username_0**: It is velocity integration, you can see the source code follow the link  
> **username_2**: Maybe two separate outflow occurrences while polar axis changing as in the second diagram?  

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## 0 answers

