Edit - Astronomy Stack Exchange

You are not logged in. Your edit will be placed in a queue until it is peer reviewed.

We welcome edits that make the post easier to understand and more valuable for readers. Because community members review edits, please try to make the post substantially better than how you found it, for example, by fixing grammar or adding additional resources and hyperlinks.

$\begingroup$ For the positve and negative magnification, did you really mean to use the words "brighter" and "dimmer" rather than "larger" and smaller? $\endgroup$
– Greg Miller
Commented May 4, 2022 at 22:12
$\begingroup$ Thanks a lot! I probably don't have enough math to grind through the paper but I'll keep it as a bookmark in my notes. $\endgroup$
– Nicholas Humphrey
Commented May 5, 2022 at 1:38
1

$\begingroup$ @gregmiller No, I meant brighter and dimmer. The surface brightness of the source image is preserved but because the $I_-$ image has a smaller surface area than the source, the magnification is $<1$ and thus is dimmer than the source. Similarly the surface area of the $I_+$ image is larger so it is brighter. That total increase in brightness is what allows us to find microlensing events. $\endgroup$
– zephyr
Commented May 5, 2022 at 2:54

Add a comment |

Correct minor typos or mistakes
Clarify meaning without changing it
Add related resources or links
Always respect the author’s intent
Don’t use edits to reply to the author

create code fences with backticks ` or tildes ~
```
like so
```
add language identifier to highlight code
```python
def function(foo):
print(foo)
```
put returns between paragraphs
for linebreak add 2 spaces at end
_italic_ or **bold**
quote by placing > at start of line
to make links (use https whenever possible)
<https://example.com>
[example](https://example.com)
<a href="https://example.com">example</a>
MathJax equations $\sin^2 \theta$

formatting help »
answering help »

MathJax help »