Astronomy C

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Astronomy C

Postby bernard » June 16th, 2016, 10:00 pm

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Re: Astronomy C

Postby windu34 » September 7th, 2016, 1:23 pm

Can anyone interpret the "Motions" portion of the Astronomy C rules?
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Re: Astronomy C

Postby Adi1008 » September 7th, 2016, 1:58 pm

windu34 wrote:Can anyone interpret the "Motions" portion of the Astronomy C rules?


If you could provide some context (just a few words, don't want you to get in trouble for copyright stuff) I could try to help.

However (this is a complete guess, as I haven't seen any rules), maybe it means the motion of stars in a binary (or more) system? Type Ia supernovae need 2+ stars, so there's bound to be a lot of stuff about binary star systems, especially RV curves, astrometry, etc.
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Re: Astronomy C

Postby windu34 » September 7th, 2016, 2:21 pm

Adi1008 wrote:
windu34 wrote:Can anyone interpret the "Motions" portion of the Astronomy C rules?


If you could provide some context (just a few words, don't want you to get in trouble for copyright stuff) I could try to help.

However (this is a complete guess, as I haven't seen any rules), maybe it means the motion of stars in a binary (or more) system? Type Ia supernovae need 2+ stars, so there's bound to be a lot of stuff about binary star systems, especially RV curves, astrometry, etc.


It asks you to use information such as motions to answer questions relating to this year's topics and the DSOs.
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Re: Astronomy C

Postby Magikarpmaster629 » September 7th, 2016, 2:40 pm

Would some kind person with the rules post the DSO list? Thank you!

Also Windu, motion problems usually refer to math, specifically Kepler's laws of planetary motion. Try looking at previous tests for examples; that part of the rules doesn't change much.
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Re: Astronomy C

Postby Adi1008 » September 7th, 2016, 3:02 pm

windu34 wrote:
Adi1008 wrote:
windu34 wrote:Can anyone interpret the "Motions" portion of the Astronomy C rules?


If you could provide some context (just a few words, don't want you to get in trouble for copyright stuff) I could try to help.

However (this is a complete guess, as I haven't seen any rules), maybe it means the motion of stars in a binary (or more) system? Type Ia supernovae need 2+ stars, so there's bound to be a lot of stuff about binary star systems, especially RV curves, astrometry, etc.


It asks you to use information such as motions to answer questions relating to this year's topics and the DSOs.


Okay...as always, this is just my understanding of the rules; nothing official. I'd say it'll have to do with binary star systems and their motion (RV, astrometry, using Kepler's Laws etc), using them to find the period of the system, combined mass, etc as said before, and using Hubble's Law to calculate distances to Type Ia supernovae (since SNe Ia are really far, they'll be receding really quickly as per Hubble's Law!!). Those are really the only "motions" I can think of associated with Type Ia supernovae specifically.
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Re: Astronomy C

Postby Unome » September 7th, 2016, 3:02 pm

Magikarpmaster629 wrote:Would some kind person with the rules edit the DSOs onto the wiki page? Thank you!

Fixed
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Re: Astronomy C

Postby Magikarpmaster629 » September 8th, 2016, 7:45 pm

Unome wrote:
Magikarpmaster629 wrote:Would some kind person with the rules edit the DSOs onto the wiki page? Thank you!

Fixed

I really should have been doing my homework, but here it is: http://scioly.org/wiki/index.php/Astronomy/DSOs
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Re: Astronomy C

Postby antoine_ego » September 16th, 2016, 2:32 am

I've been looking for information about Henize 2-248, which is on the official list. However, all I found was information about Henize 2-428. Are these DSOs equivalent?
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Re: Astronomy C

Postby Unome » September 16th, 2016, 5:23 am

antoine_ego wrote:I've been looking for information about Henize 2-248, which is on the official list. However, all I found was information about Henize 2-428. Are these DSOs equivalent?

It's probably a typo, especially since 2-428 is related to this year's topic. I'm pretty sure there isn't even a 2-248.
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Re: Astronomy C

Postby syo_astro » September 16th, 2016, 8:13 am

antoine_ego wrote:I've been looking for information about Henize 2-248, which is on the official list. However, all I found was information about Henize 2-428. Are these DSOs equivalent?


Huh, didn't notice that...I'd recommend making a clarif on the soinc website. It's weird because in my draft I see it as Hen 2-428. If there is a problem the only way to get a proper answer if there was/wasn't a typo in the rules I think. But you sure you weren't misreading?
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Re: Astronomy C

Postby Unome » September 16th, 2016, 8:16 am

syo_astro wrote:
antoine_ego wrote:I've been looking for information about Henize 2-248, which is on the official list. However, all I found was information about Henize 2-428. Are these DSOs equivalent?


Huh, didn't notice that...I'd recommend making a clarif on the soinc website. It's weird because in my draft I see it as Hen 2-428. If there is a problem the only way to get a proper answer if there was/wasn't a typo in the rules I think. But you sure you weren't misreading?

I'm pretty sure that's actually what it says, since Karp made a note about it on the DSOs wiki a few days ago.
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Re: Astronomy C

Postby jbauer999 » September 20th, 2016, 7:51 pm

Sort of a noob here, but is there any places to find help to interpret light curves. some of them just don't seem to give enough information. Like if an exoplanet is transiting its host star. how do I go about calculating distance, magnitude. Is it mostly guess and check, or are there specific things to use? If needed to elaborate, I won't mind. Thank you in advance

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Re: Astronomy C

Postby antoine_ego » September 21st, 2016, 2:50 am

jbauer999 wrote:Sort of a noob here, but is there any places to find help to interpret light curves. some of them just don't seem to give enough information. Like if an exoplanet is transiting its host star. how do I go about calculating distance, magnitude. Is it mostly guess and check, or are there specific things to use? If needed to elaborate, I won't mind. Thank you in advance


In general, you would be using other information given in conjunction with the light curve. That being said, it really depends on the curve. Some curves give you a good amount of information, others, not so much. In my opinion, it isn't guess and check, it's more of looking at the information, and thinking "Oh I have the formula to calculate temperature, and I have the stuff I need to do that from the curve!" It's more just plug and chug. Occasionally there'll be a problem that requires a stroke of genius, but that isn't typically the case. Note: This year has nothing to do with exoplanets, the topic is Type 1a Supernovae and the ever-present Stellar Evolution.
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Re: Astronomy C

Postby bearasauras » October 9th, 2016, 3:30 pm

Unome wrote:
antoine_ego wrote:I've been looking for information about Henize 2-248, which is on the official list. However, all I found was information about Henize 2-428. Are these DSOs equivalent?

It's probably a typo, especially since 2-428 is related to this year's topic. I'm pretty sure there isn't even a 2-248.


Thanks for catching that! A correction has been posted at https://www.soinc.org/official_rules_clarif.


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