R1a in the modern EASTERN Iranic people is most likely related to the Central Asian Scythians. I wouldn't want to call the Scythians model purebred Aryans. Some even have their doubts whether those were 'Iranic' in the first place.
R1a in Central Asia is really nothing special. R1a* in Kurdistan is msot likely older.
The real ARYANS aka the Western Iranic Guto-Medes had always more R1b and J2 in them than R1a.
Btw, I am not against Y-DNA R1a. My own paternal Y-DNA lineage is R1a* and it is just native to Kurdistan. It has absolutely nothing to do with Russia. I think I am going to take another test, becasue I am starting to think that my R1a* is most likely R1a2 and related to the CImmerian R1a2c
Iran_ChL means civilization, and inventive high culture component.
Iran_ChL = Sumerians, Median Empire, later Persian Empire!
Iran_ChL = true ARYAN component