Constraints on the Formation of the Planet Around HD188753A
Abstract
Description
The claimed discovery of a Jupiter-mass planet in the close triple star system HD 188753 poses a problem for planet formation theory. A circumstellar disk around the planet's parent star would be truncated close to the star, leaving little material available for planet formation. In this paper, we attempt to model a protoplanetary disk around HD 188753A using a fairly simple alpha-disk model, exploring a range of parameters constrained by observations of T Tauri-type stars. The disk is truncated to within 1.5 to 2.7 AU, depending on model parameters. We find that the in situ formation of the planet around HD 188753A is implausible.
Accepted version, to appear in ApJ. 23 pages, 5 figures (3 in color)
Accepted version, to appear in ApJ. 23 pages, 5 figures (3 in color)