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GCVS remarks A/H ratio. What is it?

DEY_VAR
Affiliation
American Association of Variable Star Observers (AAVSO)
Mon, 07/18/2022 - 19:01

Greetings,

I have seen for a few stars in VSX that have an A/H= value that seems to range from -1.0 to +0.2 in the remarks.  Apparently it was copied from the GCVS.    I have searched and searched on the GCVS web pages, the literature and I have not found anything that describes what A/H is.

Anyone got an idea what A and hence H constants are in the original GCVSs and copied to VSX?

Thanks, (DEY)

Sebastian__Otero
Mon, 07/18/2022 - 19:12
A/H

Hi James,

can you provide us with actual examples of what you are mentioning to have context?
A couple of stars showing such remarks.

Thanks!
Sebastian

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DEY_VAR
Affiliation
American Association of Variable Star Observers (AAVSO)
Mon, 07/18/2022 - 23:02
A/H

Sebastian,'

As an example in VSX look at KL Aql in the remarks section.  It gives B-V for Max/min and then A/H = 0.6

These A/H ratios are picked up from the "GCVS team". 

Do you know what the A/H ratio is?  Darned if I know!

Thanks.

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DEY_VAR
Affiliation
American Association of Variable Star Observers (AAVSO)
Sat, 07/23/2022 - 16:04
A/H is...

A/H is the mean metal abundance ratio.

 

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