What should I do to figure out what has happened to my paper? Some months ago I wrote a paper with the help of a professor who sent the paper to a journal as the "corresponding author". I have since cut contact with the professor since he lied repeatedly to me on some unrelated matter. I am afraid that he may have removed the paper from the journal since I can't see its status.
Usually, after a manuscript is submitted to a journal, all the co-authors should receive an email from the editor office or from the editor in charge which will let you know your rights and ways to communicate with the journal. If the under review time is already very long since the paper has been submitted, you can try to reach the journal just by email. But yet for some journals, only the corresponding author can receive the notification, if that is the situation, you have to solve the problem between you and your professor. Alternatively, you can still try to reach the journal for the status of the paper. But eventually, the review comments will be sent to the corresponding author.