An interesting red dwarf system!

cheesenbiscuits

cheesenbiscuits
I've found a water world orbiting a red dwarf.
How rare is this? I've never seen anthing of particular interest in these systems.
cvNuBSt.jpg
 

Tychu9

T
I found one last year on the way to Colonia. I don't remember where it was though. Because of that one find, I get the urge to jump into brown dwarf systems.
 

iain666

iain666
WW orbiting M-class red dwarfs aren't massively uncommon, I've tagged a few ELW as well in systems with an M primary.

WW orbiting an L class red/brown dwarf is a lot rarer, I've only found one in a system without a hotter star nearby. An ELW orbiting an L class primary remains my holy grail. I've found them orbiting L dwarfs with an M or hotter star nearby to add some additional heat input but never around an L primary.

Your picture has an L - so pretty rare if that's the hottest star in system.
 

Sapyx

Sapyx
I think someone crunched the numbers a while back and estimated that the ELW probability for class M red dwarfs is about 1 in 2000. Compare that with about 1 in 50 for ELWs around F-class stars. So ELWs around red dwarfs are out there, they're just darned hard to find.

I'm not sure what the probabilities are for waterworlds, maybe ten times more probable? So that's be about 1 in 200 M-class with a waterworld. Again, not "common", but there must be billions of them out there in the galaxy.

For L-class brown dwarfs, I don't think enough ELWs have been found around them to give meaningful statistics, but it'd be lower than 1 in 2000. Probably a lot lower. 1 in 5000, maybe?
 

Duckfat

Duckfat
Sapyx said:
I think someone crunched the numbers a while back and estimated that the ELW probability for class M red dwarfs is about 1 in 2000. Compare that with about 1 in 50 for ELWs around F-class stars. So ELWs around red dwarfs are out there, they're just darned hard to find.

I'm not sure what the probabilities are for waterworlds, maybe ten times more probable? So that's be about 1 in 200 M-class with a waterworld. Again, not "common", but there must be billions of them out there in the galaxy.

For L-class brown dwarfs, I don't think enough ELWs have been found around them to give meaningful statistics, but it'd be lower than 1 in 2000. Probably a lot lower. 1 in 5000, maybe?
Click to expand...

Ok now do the probability of a ringed ELW orbiting a neutron star, orbiting a black hole. :p
 

Kzasch

Kzasch
Think my oddest is a CFT WW orbiting a Y-class, or a CFT HMC orbiting a gas giant (both waaaaay to far from habitable zone of main star).
 

marx

marx
Duckfat said:
Ok now do the probability of a ringed ELW orbiting a neutron star, orbiting a black hole. :p
Click to expand...
I'm fairly certain that's zero, because of the last part. The temperatures of atmospheric moons is bugged (see here, and while a handful of Earth-likes have been found that are moons of class K/M stars which orbit black holes, other stars would be too hot to have Earth-likes orbit them as moons. If they'd be that far, they would orbit the black hole instead.

As for the probability of a ringed ELW, it looks like that at best 2% of Earth-likes are ringed (rounded up), so if you have a probability for any given ELW, just multiply it with 2% to get the probability of the same ELW being ringed.

About class M, L and neutron stars: it depends on what you're looking for. Is the ELW in a system with a single primary star, or multiples? Let me give you a specific example: out of ~9500 ELWs currently on the ELW list, 1328 orbit an M dwarf (or co-orbits multiple stars among which at least one is an M dwarf), but only 498 of those are in a system where the main star (the one you see on the galaxy map) is an M, and only 177 is where the only star is an M.
Bear in mind that the above numbers don't contain nor reflect the amount of systems that have been visited to actually find these!
Now, the same values for neutron stars are 496, 239, 161. But for L dwarfs? There are 129 orbiting them in total, but only two where the main star is class L, and just a single one where it's the only star. Droju IG-M a103-0 3, discovered by CMDR Veersarge.

As such, an ELW orbiting a solo class L dwarf is the most rare type of ELW that has been confirmed to actually exist.

Speaking of rarity records, there's also Sluenoe CL-Y g5 ABC 6 h, discovered by CMDR Parabolus: a ringed Earth-like moon of a class T brown dwarf star, which co-orbits two black holes and a neutron star.
 
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cheesenbiscuits

cheesenbiscuits
iain666 said:
WW orbiting M-class red dwarfs aren't massively uncommon, I've tagged a few ELW as well in systems with an M primary.

WW orbiting an L class red/brown dwarf is a lot rarer, I've only found one in a system without a hotter star nearby. An ELW orbiting an L class primary remains my holy grail. I've found them orbiting L dwarfs with an M or hotter star nearby to add some additional heat input but never around an L primary.

Your picture has an L - so pretty rare if that's the hottest star in system.
Click to expand...

It is a L class primary,the other star is also an L class,but significantly further away :D
 
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[VR] optimal_909

[VR] optimal_909
iain666 said:
WW orbiting M-class red dwarfs aren't massively uncommon, I've tagged a few ELW as well in systems with an M primary.

WW orbiting an L class red/brown dwarf is a lot rarer, I've only found one in a system without a hotter star nearby. An ELW orbiting an L class primary remains my holy grail. I've found them orbiting L dwarfs with an M or hotter star nearby to add some additional heat input but never around an L primary.

Your picture has an L - so pretty rare if that's the hottest star in system.
Click to expand...

Indeed, out of four ELWs I stumbled upon during Silly Ships 2, three were orbiting an M-class. This is one of them.
uHrgRi1.jpg
 

Leif_Erikson

Leif_Erikson
M class ELWs are pretty rare-I've only found four out of over 100 ELW finds.

However it seems NASA seem to find an Earth Like candidate orbiting a M class Red Dwarf every other week!
 
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