Properties of Type Ia protoplanets, that is, fragments which have undergone second collapse and attained a central density of 10⁻³g cm⁻³. Panels a and b: spherically-averaged density and temperature, respectively. They do not vary significantly from protoplanet to protoplanet, though the protoplanets in runs 6, 9 and 27 posses denser and hotter central regions due to their higher mass. Panels c and d: rotational (azimuthally-averaged) and infall velocity (spherically-averaged), the former of which is significant as the protoplanets reside in a rotating disc. The peaks in infall velocity are indicative boundaries where gas begins to decelerate. The second core boundaries are at R = 10⁻²−10⁻¹ AU and the first core boundaries at R = 1−10 AU. Panel e: mass of the protoplanet within a given radius, demonstrating that even in low mass discs, the mass of formed objects is of the order of a few M_j or higher. Panel f: ratio of energies interior to a given radius: E_ther∕E_grav (top set of lines) and E_rot∕E_grav (bottom set of lines). Rotational energy is generally much lower than the gravitational energy. The short vertical lines in (d) indicate the positions of the second cores.