Get-VM to list VM name only

Question

I am using following command to generate text file of all Windows servers that are powered on
Get-Vm where {$_.guest -match 'windows'} | where {$_.PowerState -eq 'PoweredOn'} | Out-File D:\Scripts\SL.txt
This generates list with following information :
Name                 PowerState Num CPUs Memory (MB)
What I really want is to generate list with name ONLY and and omit PowerState Num CPU's Memory.
Yasar

Answer 1

Thanks Mike
That works too only I want to avoid the heading itself being included in the text file, in other words :
Name    < ----- Exclude                                                                   
------     < -----  Exclude                                                                  
VM1
VM2
VM3
I did find that  Get-Vm | where {$_.guest -match 'windows'} | where {$_.PowerState -eq 'PoweredOn'} |
Format-Wide -Column 1 |  Out-File D:\Test\SL.txt will also do similar which is great learning PS as I go  but how to exclude this not sure. Reason : I am running script to read  sl.txt  which is list of my VM, and then query
drive space and email HTML report. If I have other parts then script run but has some errors
Yasar