Maps of Toomre’s Q parameter towards MMS1a and b. The color scale indicates the value of Toomre’sQ parameter, where blue is Toomre-stable, yellow is critical, and red regions are gravitationally unstable against axisymmetric perturbations, where the level of Qcrit = 1 is indicated by the red dashed contours. The black contours indicate the 5, 10, 15, 20σ continuum emission levels and increase further in steps of 20σ, where σ = 0.28 mJy beam−1. The solid and dashed gray ellipses show the deprojected radii of the disks with diameter 4300 and 8600 au, respectively. The black diamonds in the MMS1a panels mark the positions of the emission peaks at 3.6 cm (Rodríguez et al. 2012). Top panels: Q parameter maps of the two cores for the rotating disk structures seen almost face-on (i = 10°). Motivated by the disk inclination estimate of iMMS1b ~ 80° (Rodríguez et al. 2012), we also present maps for such disk inclinations (bottom panels) and intermediate values (i = 45°, middle panels). For the deprojection process, the angles of the disk major axes of ϕmaj,MMS1a ≈ 240° and ϕmaj,MMS1b ≈ 230° (relative to the north–south axis, see text) were used. The shaded ellipse in the lower right corner indicates the synthesized beam of the CH3CN data of 0.42′′ × 0.35′′ (PA 61°).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.