If you have one or more children living in Australia, you might be eligible to apply for an Australia parent visa (subclass 103).
This visa is suitable for the parent or parents of a child/step-child who is a settled Australian citizen, settled permanent resident, or settled eligible New Zealand citizen. If granted, this visa will allow the parent or parents to permanently migrate to Australia to join their children.
Whether you qualify for this visa depends on a number of factors, such as:
residence status of your child(ren) in Australia
the amount of time the sponsoring child has lived in Australia
whether you meet the balance of family test
whether you meet certain health and character criteria