<p>Basically, we can determine the same information that we are able to extract from the spectrum of a nearby star, as long as the star in M31 can be spatially resolved.</p>
<p>You can find that information yourself, by using SIMBAD:</p>
<p><a href="http://simbad.cds.unistra.fr/simbad/sim-basic?Ident=M31&amp;submit=SIMBAD+search" rel="nofollow noreferrer">http://simbad.cds.unistra.fr/simbad/sim-basic?Ident=M31&amp;submit=SIMBAD+search</a></p>
<p>Then scrolling down a bit, following the hierarchy link to &quot;Children&quot; (Warning: It'll take a while). In the list stars are denoted by &quot;*&quot;</p>

CC BY-SA 4.0
2023-07-11T16:38:31.070Z
2023-07-11T16:38:31.070Z
Grimaldi
<p>According to the answers to <a href="https://astronomy.stackexchange.com/q/35927/7982">Visible Stars in Andromeda Galaxy</a>, is it possible to distinguish between different stars in Andromeda galaxy. What I am curious about is how much information are we able to extract about physical details of these objects. What can we tell about such distant stars? Can we resolve their individual masses and types?</p>
<p>Do we know, <em>for example</em>, what is the biggest star within M31? Or perhaps can we tell something only about a couple of special cases (such as variable stars, binary systems or massive giants) and information about individual &quot;standard&quot; stars is lost in the blur?</p>

CC BY-SA 4.0
2023-07-10T23:57:38.653Z
Apparently, we know enough to have figured out where some of its stars came from… https://arxiv.org/pdf/2208.11683.pdf
Pierre Paquette
CC BY-SA 4.0
2023-07-14T01:11:48.310Z
This is a good "big picture" question and can be answered in a reasonable way, so **voting to leave open** so as not to prevent others from having an opportunity to add an answer; [bountying](https://english.stackexchange.com/q/546030/217285) as well!
uhoh
<star><galaxy><m31>
What do we know about properties of individual stars in the Andromeda Galaxy?
Presto
# What do we know about properties of individual stars in the Andromeda Galaxy?

(Asked by: username_0 on 2023-07-10)

According to the answers to [Visible Stars in Andromeda Galaxy](https://astronomy.stackexchange.com/q/35927/7982), is it possible to distinguish between different stars in Andromeda galaxy. What I am curious about is how much information are we able to extract about physical details of these objects. What can we tell about such distant stars? Can we resolve their individual masses and types?

Do we know, *for example*, what is the biggest star within M31? Or perhaps can we tell something only about a couple of special cases (such as variable stars, binary systems or massive giants) and information about individual "standard" stars is lost in the blur?

**Tags:** star, galaxy, m31

> **Comments:**
> **username_1**: Apparently, we know enough to have figured out where some of its stars came from… https://arxiv.org/pdf/2208.11683.pdf  
> **username_2**: This is a good "big picture" question and can be answered in a reasonable way, so **voting to leave open** so as not to prevent others from having an opportunity to add an answer; [bountying](https://english.stackexchange.com/q/546030/217285) as well!  

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## 1 answers

### Answer by username_3 on 2023-07-11. Score: 3 | Accepted answer

Basically, we can determine the same information that we are able to extract from the spectrum of a nearby star, as long as the star in M31 can be spatially resolved.

You can find that information yourself, by using SIMBAD:

<http://simbad.cds.unistra.fr/simbad/sim-basic?Ident=M31&submit=SIMBAD+search>

Then scrolling down a bit, following the hierarchy link to "Children" (Warning: It'll take a while). In the list stars are denoted by "\*"


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