Astronomy C Question Marathon

Test your knowledge of various Science Olympiad events
syo_astro
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Re: Astronomy C Question Marathon

Post by syo_astro »

Wait, did that work for alpacas?
B: Crave the Wave, Environmental Chemistry, Robo-Cross, Meteo, Phys Sci Lab, Solar System, DyPlan (E and V), Shock Value
C: Microbe Mission, DyPlan (Fresh Waters), Fermi Questions, GeoMaps, Grav Vehicle, Scrambler, Rocks, Astro
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alpacas
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Re: Astronomy C Question Marathon

Post by alpacas »

yeah go for it, thats pretty much what I was looking for
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Re: Astronomy C Question Marathon

Post by syo_astro »

Okay, an RR Lyrae star has an apparent magnitude of +11. What is the distance to this star in Mpc?
B: Crave the Wave, Environmental Chemistry, Robo-Cross, Meteo, Phys Sci Lab, Solar System, DyPlan (E and V), Shock Value
C: Microbe Mission, DyPlan (Fresh Waters), Fermi Questions, GeoMaps, Grav Vehicle, Scrambler, Rocks, Astro
Grad: Writing Tests/Supervising (NY/MI)
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FawnOnyx
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Re: Astronomy C Question Marathon

Post 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
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syo_astro
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Re: Astronomy C Question Marathon

Post 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
That's what I got. Your move.
B: Crave the Wave, Environmental Chemistry, Robo-Cross, Meteo, Phys Sci Lab, Solar System, DyPlan (E and V), Shock Value
C: Microbe Mission, DyPlan (Fresh Waters), Fermi Questions, GeoMaps, Grav Vehicle, Scrambler, Rocks, Astro
Grad: Writing Tests/Supervising (NY/MI)
Crazy Puny Man
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Re: Astronomy C Question Marathon

Post by Crazy Puny Man »

I saw the rules, and it looks like a combo of 2012 & 2013 all in this year.

Syo, you're going to have one pigeon of a fun time :P
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Re: Astronomy C Question Marathon

Post by asdfqwerzzz2 »

I guess I'll join in with something moderately easy.

A quasar with redshift (z) of 0.2 may have a line in its observed spectrum of 6000 angstroms. What was the rest wavelength when it was emitted?
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Re: Astronomy C Question Marathon

Post by FawnOnyx »

Crazy Puny Man wrote:I saw the rules, and it looks like a combo of 2012 & 2013 all in this year.
Yeah, this means all 3 of my astro years will have been on stellar evolution, with this being the grand finale :D
Emitted wavelength = observed wavelength / (1 + z) = 6000/(1.2) = 5000 angstroms
Technically, I was supposed to post a new question since I got the last one, but yeah I took forever to check this so it's cool.
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asdfqwerzzz2
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Re: Astronomy C Question Marathon

Post by asdfqwerzzz2 »

FawnOnyx wrote:
Crazy Puny Man wrote:I saw the rules, and it looks like a combo of 2012 & 2013 all in this year.
Yeah, this means all 3 of my astro years will have been on stellar evolution, with this being the grand finale :D
Emitted wavelength = observed wavelength / (1 + z) = 6000/(1.2) = 5000 angstroms
Technically, I was supposed to post a new question since I got the last one, but yeah I took forever to check this so it's cool.
Yep! thats it. Haha my bad, though I'd just join in :lol:
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Re: Astronomy C Question Marathon

Post by FawnOnyx »

Let's do something more graphical!

1. Identify the DSO
2. A similar supernova remnant of the same type is observed to have a peak apparent magnitude of +14.6. Estimate its distance in Mpc.

Image
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