alpacas wrote:ok, what is the r-process? What DSOs from this year's rules might eventually have (or have had) the r-process?
Also are these questions supposed to be more like concept or trivia based?
Jeez the rules didn't even come out yet at the time you posted this >_>
[hide]How does this work?[/hide]
r = 'rapid'; it's the process that forms elements heavier than iron in a supernova explosion, where nuclei (or neutrons? I can't remember, someone specify for me please >_>) rapidly collide with each other and fuse into heavier elements.
Am I right? It's been a long time since I read about that
Re: Astronomy C Question Marathon
Posted: September 3rd, 2013, 5:36 pm
by syo_astro
Crazy Puny Man wrote:
alpacas wrote:ok, what is the r-process? What DSOs from this year's rules might eventually have (or have had) the r-process?
Also are these questions supposed to be more like concept or trivia based?
Jeez the rules didn't even come out yet at the time you posted this >_>
r = 'rapid'; it's the process that forms elements heavier than iron in a supernova explosion, where nuclei (or neutrons? I can't remember, someone specify for me please >_>) rapidly collide with each other and fuse into heavier elements.
Am I right? It's been a long time since I read about that
The r-process itself is a rapid process of neutron capture by heavy nuclei (should we elaborate more?). The DSO would likely be a massive explosion (Ib/Ic/II/etc). This is quite important in forming heavy nuclei. But Crazy Puny Man can take it if that's all good enough for alpacas.
I feel like the questions could be anything we want, even math. I guess this is just for practice. When everyone gets the rules maybe we could even do DSO/object ID . Though, if any mods could help on this that'd be a better answer.
Re: Astronomy C Question Marathon
Posted: September 3rd, 2013, 6:06 pm
by iwonder
I think as long as the questions are related to scioly astronomy there aren't any guidelines. Just have fun
Re: Astronomy C Question Marathon
Posted: September 3rd, 2013, 8:26 pm
by syo_astro
Also, for Crazy Puny Man (I messed with some of my answers to hide them as shown with the edits >.<). The hide works a few ways. Either you can type or copy and paste: [hide]click me|a[ /hide]
Before the vertical bar is the text we'll see, after is what is hidden. You'd have to remove the space also. Or there is a hide button above where you make posts, but you still need to put in the vertical bar.
Re: Astronomy C Question Marathon
Posted: September 4th, 2013, 6:45 pm
by Crazy Puny Man
Alright, coolio.
And you can take this question for some reason I'm feeling particularly lazy...
Re: Astronomy C Question Marathon
Posted: September 4th, 2013, 10:44 pm
by syo_astro
Wait, did that work for alpacas?
Re: Astronomy C Question Marathon
Posted: September 5th, 2013, 3:57 pm
by alpacas
yeah go for it, thats pretty much what I was looking for
Re: Astronomy C Question Marathon
Posted: September 5th, 2013, 6:40 pm
by syo_astro
Okay, an RR Lyrae star has an apparent magnitude of +11. What is the distance to this star in Mpc?
Re: Astronomy C Question Marathon
Posted: September 5th, 2013, 8:21 pm
by FawnOnyx
Average absolute magnitude of RR Lyrae: +0.75
Use distance modulus: d=10^[(11-0.75+5)/5] = 1100 pc = 0.0011 Mpc
Re: Astronomy C Question Marathon
Posted: September 5th, 2013, 9:02 pm
by syo_astro
FawnOnyx wrote:
Average absolute magnitude of RR Lyrae: +0.75
Use distance modulus: d=10^[(11-0.75+5)/5] = 1100 pc = 0.0011 Mpc
. Though, if any mods could help on this that'd be a better answer.