FN Lyr - Low-mass companion?

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Re: FN Lyr - Low-mass companion?

Post by Edasich on 9th October 2015, 3:38 am

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Re: FN Lyr - Low-mass companion?

Post by Stalker on 9th October 2015, 1:22 pm

Try sci-hub.org

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Re: FN Lyr - Low-mass companion?

Post by Edasich on 10th October 2015, 4:25 am

Stalker wrote:Try sci-hub.org

Nothing.
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Re: FN Lyr - Low-mass companion?

Post by Stalker on 10th October 2015, 2:37 pm

Edasich wrote:
Stalker wrote:Try sci-hub.org

Nothing.

Really? rabbit

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Re: FN Lyr - Low-mass companion?

Post by Sirius_Alpha on 10th October 2015, 3:48 pm

I get a 404 - Not Found


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Re: FN Lyr - Low-mass companion?

Post by Stalker on 10th October 2015, 4:05 pm

Ok, try to write 10.1093/mnras/stu1344 in the search bar of sci-hub.org

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Re: FN Lyr - Low-mass companion?

Post by Sirius_Alpha on 10th October 2015, 4:34 pm

Well, for whatever reason, your link is working now.

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Re: FN Lyr - Low-mass companion?

Post by Stalker on 12th October 2015, 8:25 am

According to the second paper the FN Lyrae's planet have a mass of only 1.3 Mearth O_o. Is the 10^-6 an error?

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Re: FN Lyr - Low-mass companion?

Post by Lazarus on 12th October 2015, 1:15 pm

Is that sci-hub.org site legal? Suspect

FN Lyr ≠ FL Lyr

Also the spectroscopic binary mass function f(M) is not the mass, or even the minimum mass.

f(M) = (m sin i)3 / (M + m)2

So assuming the approximation Mm:

m sin i ≈ [f(M) M2]
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Re: FN Lyr - Low-mass companion?

Post by Stalker on 12th October 2015, 2:08 pm

Ho thanks. It make max Msini of 10 and 40 Mj planet and brown dwarf if the stars are classical RR Lyrae variables with half of the sun's mass or less. Sci-hub is as legal as any streaming website, but cops wont come at your home if you use it.

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Re: FN Lyr - Low-mass companion?

Post by Edasich on 13th October 2015, 4:39 am

Any data concerning stellar parameters of FN Lyr and *V894 Cyg? They seem quite low-mass stars but spectral type should be F or G, right?
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FN Lyr - Low-mass companion?

Post by Lazarus on 13th October 2015, 12:45 pm

Maybe the FN Lyrae stuff should be moved into its own thread?

According to this page, RR Lyrae stars typically have spectral types A2F6. This source gives A5III for FN Lyrae, but bear in mind that RR Lyrae variables are pulsating so it could vary over the course of the cycle.
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Re: FN Lyr - Low-mass companion?

Post by Sirius_Alpha on 13th October 2015, 3:36 pm

Lazarus wrote:Maybe the FN Lyrae stuff should be moved into its own thread?
Excellent suggestion. Done.

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