Displaying page media @2x

I have 2 questions:

1. Is it possible to use density tags in the srcset instead of width? E.g. srcset="path-to-file.png 2x"

2. If the above isn't possible, can I retrieve a 2x image manually? When using the following: page.media[page.header.image_logo].url it gives me the 1x image (I uploaded a 2x image), is it possible to get the 2x image URL?

Thanks

I have no experience with image densities myself, but have you read the docs about Responsive images?