A search for transiting planets in the β\beta Pictoris system

The bright $(V=3.86)$ star $\beta$ Pictoris is a nearby young star with a debris disk and gas giant exoplanet, $\beta$ Pictoris b, in a multi-decade orbit around it. Both the planet's orbit and disk are almost edge-on to our line of sight. We carry out a search for any transiting planets in the $\beta$ Pictoris system with orbits of less than 30 days that are coplanar with the planet $\beta$ Pictoris b. We search for a planetary transit using data from the BRITE-Constellation nanosatellite BRITE-Heweliusz, analyzing the photometry using the Box-Fitting Least Squares Algorithm (BLS). The sensitivity of the method is verified by injection of artificial planetary transit signals using the Bad-Ass Transit Model cAlculatioN (BATMAN) code. No planet was found in the BRITE-Constellation data set. We rule out planets larger than 0.6 $\mathrm{R_J}$ for periods of less than 5 days, larger than 0.75 $\mathrm{R_J}$ for periods of less than 10 days, and larger than 1.05 $\mathrm{R_J}$ for periods of less than 20 days.Comment: 6 pages, 6 figures, 3 tables. Accepted for publication in A&

Depression and play in early childhood. Play behavior of depressed and nondepressed 3- to 6-year olds in various play situations

Item does not contain fulltextThe behavior of seven depressed and seven nondepressed 3- to 6-year-olds was compared in three play situations: solitary free play, interactive free play, and play narratives. Depressed children played significantly less than their nondepressed controls. This was mainly due to differences in symbolic play. The groups did not differ with regard to manipulative play. The differences between depressed and nondepressed children varied across play situations. Depressed children showed significantly more nonplay behavior than their nondepressed counterparts. In addition, the behavior of depressed children showed less coherence than the behavior of the nondepressed children. Finally, mood induction proved to have no differential effect on the play behavior of depressed and nondepressed children

Depression markers in young children's play: A comparison between depressed and nondepressed 3- to 6-year-olds in various play situations

Item does not contain fulltex