What are the star and yellow star team markers?

[Eureka!]

I did a quick search and couldn't find anything, so shens if it's already been discussed.

I know most people have a team marker with the icon of their class. What about those with a star or a yellow star?

 

[Spray]

The yellow / golden star means that you have unlocked all the achievements in DoD.

 

[rubberbandman]

and you are a WAR HEROOOOOOOOOOOOO

 

[SoNotIsaac]

how about the weapon classes above team-mates?

 

[ronpaul]

how about the weapon classes above team-mates?

Class specific achievements.

Dogface
Get 1000 kills as the Rifleman player class

Point Man
Get 1000 kills as the Assault player class

Squaddie
Get 1000 kills as the Support player class

Head Hunter
Get 1000 kills as the Sniper player class

The Iron Curtain
Get 1000 kills as the Machinegunner player class