Also, I think you need to understand the publication process. When some physicist has a new idea, it takes a lot of effort to get it into a form in which it is publishable. The first thing said physicist will do is to bounce the idea around his friends at lunch, and then maybe do a conference presentation.
One other thing is that referred journal articles are *terrible* forums for dealing with truly new ideas (partly because most new ideas are bad ideas), and professionals don't send their latest and greatest ideas to peer-reviewed journals. They talk about their ideas over lunch, and it's only after they get positive informal feedback that they'll try to publish.
You should also know that in astrophysics, journal articles are not the primary method of scientific communication. They are useful to make sure that stuff doesn't get lost and for score keeping, but with some uncommon exceptions (WMAP results), people don't get their information from journals.