The team also determined the gas
infall rate to be a millionth of the
mass of the Sun per year, with a speed of 1 km per second.
In 2000, a team of astronomers (Nick N. Gorkavyi, Sara Heap, Leonid Ozernoy, Tanya A. Taidakova, and John Mather) announced that modelling of the asymmetric circumstellar disk
infalling into Vega suggests that there may be a planet twice the
mass of Jupiter at an orbital distance of about 50 to 60 AU from the star — up to one and a half times the «average» orbital distance of Pluto in the Solar System (N.N. Gorkavyi et al, 2000 and more discussion).
The Pistol Star may be radiating enough energy to halt the further
infall of gas and dust that had been agglomerating onto the star, thus limiting its maximum
mass.