Pedantic..?
- Thread starter Sugarat
- Start date
* not always.
Would it be pedantic to say there should be three full stops in the ellipsis in your thread title?
Don't hate on me!
Jon
I corrected that for you..
First off, kudos on finding proof that the game takes main sequence evolution into account.
Let me explain,
The F class can be almost any mass, however what defines it is the temperature. And F class temp ranges between 6000 - 7500 K. The surface temperature is what determines the spectra of emission as well as the peak frequency of light emitted. The peak frequency determines the color. Which is why hot low mass white dwarves are white, and cool high mass giants are red. Temp and spectra are the things we can measure directly from earth. Mass is only measured indirectly, and after the spectra is determined.
Also, and this is important: The notes describe a common main sequence mass at birth.
Now here's where it gets a little complex. For stars under 1.5 solar masses are powered more by the P-P chain, the temperature increases as it gets older, however, for stars that are over 1.5 masses powered by the CNO cycle, the temperature decreases after birth onto the main sequence. So here we have a 0.5 billion year old star, that started life at the very low end of the A class and then steadily cooled down to just under 7500 K thus transitioning to an F class spectrum. From white to bright yellow, thus F.
Tldr:
Larger stars cool down slightly as they age on the main sequence, and can drop a letter class on the OBAFGKM "scale" if they're on the borderline while keeping (pretty much) the same mass.
Let me explain,
The F class can be almost any mass, however what defines it is the temperature. And F class temp ranges between 6000 - 7500 K. The surface temperature is what determines the spectra of emission as well as the peak frequency of light emitted. The peak frequency determines the color. Which is why hot low mass white dwarves are white, and cool high mass giants are red. Temp and spectra are the things we can measure directly from earth. Mass is only measured indirectly, and after the spectra is determined.
Also, and this is important: The notes describe a common main sequence mass at birth.
Now here's where it gets a little complex. For stars under 1.5 solar masses are powered more by the P-P chain, the temperature increases as it gets older, however, for stars that are over 1.5 masses powered by the CNO cycle, the temperature decreases after birth onto the main sequence. So here we have a 0.5 billion year old star, that started life at the very low end of the A class and then steadily cooled down to just under 7500 K thus transitioning to an F class spectrum. From white to bright yellow, thus F.
Tldr:
Larger stars cool down slightly as they age on the main sequence, and can drop a letter class on the OBAFGKM "scale" if they're on the borderline while keeping (pretty much) the same mass.
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As usual Ziljan...thanks for the super duper technical stuff. Love it!!
Frawd
Frawd
First off, kudos on finding proof that the game takes main sequence evolution into account.
Let me explain,
The F class can be almost any mass, however what defines it is the temperature. And F class temp ranges between 6000 - 7500 K. The surface temperature is what determines the spectra of emission as well as the peak frequency of light emitted. The peak frequency determines the color. Which is why hot low mass white dwarves are white, and cool high mass giants are red. Temp and spectra are the things we can measure directly from earth. Mass is only measured indirectly, and after the spectra is determined.
Also, and this is important: The notes describe a common main sequence mass at birth.
Now here's where it gets a little complex. For stars under 1.5 solar masses are powered more by the P-P chain, the temperature increases as it gets older, however, for stars that are over 1.5 masses powered by the CNO cycle, the temperature decreases after birth onto the main sequence. So here we have a 0.5 billion year old star, that started life at the very low end of the A class and then steadily cooled down to just under 7500 K thus transitioning to an F class spectrum. From white to bright yellow, thus F.
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Well that is a far more comprehensive answer than I was expecting.. and much of it over my head.. but I think I get the gist of it
Thanks.
Agreed. Ziljan's posts in threads like this one are informative and a joy to read. Some of it is indeed over my head, as Sugarat expressed, but there's enough layman-friendly explanation to get me past the stuff I only sort-of understand.
Which is a kind of long way to say that, as usual, I can't rep Ziljan because I've already done so recently.
Well that is a far more comprehensive answer than I was expecting.. and much of it over my head.. but I think I get the gist of it
Thanks.
Sorry, I try to keep it in plain English. But apparently I'm no NDT. I meant to include a tldr section., and just to clarify in the shortest simplest terms:
Larger stars cool down slightly as they age on the main sequence, and can drop a letter class on the OBAFGKM "scale" if they're on the borderline while keeping (pretty much) the same mass.
It was explained very well tbh.. and the bit above is exactly what I took from your explanation, thanks again
Of course you're not over pedantic.
In fact, the accepted procedure for this is to demand this to be fixed and immediate resignations for those responsible, or else there Elite will not last for 3 weeks and you will tell your friends not to buy Elite.
In fact, the accepted procedure for this is to demand this to be fixed and immediate resignations for those responsible, or else there Elite will not last for 3 weeks and you will tell your friends not to buy Elite.
Haha, yeah well.
There are a few hiccups in the stellar forge, in particular with extended longevity of high mass stars and too many blue stars in the core of the galaxy. I suspect this was done intentionally to bump up the blue star population to detectable levels, lol. Kind of like the over bright nebulae and skybox Milky Way. But for the most part, it is stunningly accurate and detailed in its execution.
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Pedantic or not, these sorts of threads are great fun and informative to read so if you're being pedantic bring on the pedants-with-interesting-pedantry.
If there's anyone I'd take his/her word from in this case that'll be youHaha, yeah well.
There are a few hiccups in the stellar forge, in particular with extended longevity of high mass stars and too many blue stars in the core of the galaxy. But for the most part, it is stunning accurate and detailed in its execution.
When you write code to procedurally construct 400 billion systems, there's bound to be some glitches. So maybe immediate resignations was uncalled for. Delayed resignations will do.
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It sparked Ziljan to shower us with tasty facts, so it's all good
It sparked Ziljan to shower us with tasty facts, so it's all good
In my fantasies, Frontier has outfitted our exploration ships with scanners to directly measure all of the details that are currently hidden and locked away in the black box of the stellar forge. Then this stuff would become so intuitive that anyone here could explain it to a 5th grader.
To a large extent, that has already occurred. People already speak in terms of solar masses, AU, and Ls as if they were talking about kg, km, and meters. And everyone here knows exactly how far away the center of the galaxy is and how many stars are in it. We also have an intuitive sense of color and temperature now as well and how that normally relates to stellar mass on the main sequence.
Everyone in this thread knows enough that my answer above wasn't just gobbledegook, but was actually somewhat intuitive. Which means that you my dear CDMRs are several steps ahead of most people who have taken undergrad university astronomy courses. Let that sink in.
Rather not, or else my head won't fit in the pilot's helmet anymore.
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