If you thought you've seen all of the possible theories about Aryans in India, you're wrong. After Aryan Invasion Theory, and Aryan Migration Theory, now there is AOT: Aryan Outsourcing Theory!
From here, with google translate:
http://sargasso.nl/indische-oceaan-2-eerste-handelsnetwerken/
What is this web-site? Using google translate again:
In the latter days of the Indus civilization, the townspeople may have hired Indo-Aryan charioteers to fight their wars. After the eventual demise of the Indus civilization pulled these Indo-Aryan warriors with their families and their livestock through to the Indus-Ganga plains, where they are of different kingdoms founded. They brought Y-DNA haplogroup R1a1a with them, today one of the biggest haplogroups in India. The customs of these Indo-Arian migrants would form the basis for the Vedic religion.
From here, with google translate:
http://sargasso.nl/indische-oceaan-2-eerste-handelsnetwerken/
What is this web-site? Using google translate again:
Sargasso exists since 2001 and is one of the oldest weblogs in the Netherlands. In the rich history of Sargasso you will find the introduction of the live blog in the Netherlands, the coins of the term reaguurder, putting data journalism on the map and the struggle for more transparency in public administration (witness the many Wob procedures that Sargasso conducted has).