Rarity of Spectral Classes

[Redfox]

Having recently developed a 'thing' for White Dwarfs I wanted to look up the rarity of their spectral classes.

The following chart is a side-product of that and might help answering those random "How rare is this/that?" questions.

Spoiler

(based on EDDB; recent export courtesy of Amiganer)
(...and yes, we're all aware the data submitted to EDDB is biased/skewed/selective )

 

[thundernuns]

F is more common than G? Interesting stuff [up]

 

[Orvidius]

F is more common than G? Interesting stuff [up]

Huh, interesting point. F should fall somewhere between G and K. I wonder if this is due to explorers frequently filtering out the smaller stars, creating a sort of "bimodal distribution" in the statistics.

For others reading along: Within the main sequence, lower mass, lower temperature stars should be more common than the hotter, larger stars, for several reasons. They're easier to make and thus more numerous to begin with. Plus they're much longer lived. An M-class red dwarf will live for possibly a few trillion years, whereas an O-class star will have its lifespan measured in only millions of years. Compare this to our sun, a G-class star, whose life will be measured in billions.

 

[Jackie Silver]

Huh, interesting point. F should fall somewhere between G and K. I wonder if this is due to explorers frequently filtering out the smaller stars, creating a sort of "bimodal distribution" in the statistics.

Yeah. When possible I fly with K and M filtered out (it makes for easier scooping) and people might also be flying with filter set to A and F only to look for ELW.

 

[Straha Yeagar]

Yeah. When possible I fly with K and M filtered out (it makes for easier scooping) and people might also be flying with filter set to A and F only to look for ELW.

If I am Buckeyballing, I filter for M class only, but it does make sense that F would be so common as that is the star type most commonly mentioned for finding Earthlikes, as well as teraformables.

 

[Shinji Ikari]

F is more common than G? Interesting stuff [up]

Probably because the chart reflects scanned bodies. For example, I scanned only B type stars when I was near the core as their density was high enough to do it but if I had not filtered the stars, I would have seen very few of them.

 

[Leif_Erikson]

Having recently developed a 'thing' for White Dwarfs I wanted to look up the rarity of their spectral classes.

The following chart is a side-product of that and might help answering those random "How rare is this/that?" questions.

Spoiler

https://i.imgur.com/apyeuDo.png
(based on EDDB; recent export courtesy of Amiganer)
(...and yes, we're all aware the data submitted to EDDB is biased/skewed/selective )

Great chart.As I've been scanning White Dwarf systems this year the chart for WD types mirrors what I have found