Max Planck Institutes and Experts

Like no other medium, language transports meaning in interactions. Recent studies highlight (1) how meaning is constituted through shared social experience in interactions with preverbal infants, (2) that different social contexts can modify the meaning of gestures in the second year of life, and (3) that young children can establish meaning in original ways when encountering cooperative contexts that limit the use of linguistic communication.

The Indian Ocean is the third largest Ocean of the world, measuring approximately 69 million square kilometers. It connects Africa, West-, South-, Southeast-, and East Asia among each other. This ocean has been transversed by sailors for more than 5.000 years now, first only in parts, but after the deciphering of the monsoon-code (southwesterly winds in summer, northeasterly winds in winter) at the turn of the common era, also in its entire width.

Two astronomers have produced the first direct images of a gigantic X-shaped distribution of stars in the center of the Milky Way. The collaboration began when Dustin Lang (University of Toronto) tweeted an image he had recently created. From the tweet, Melissa Ness (MPIA) recognized the image's significance for reconstructing the history of our home galaxy. The X-shaped distribution indicates that the bulge of stars surrounding the center of the galactic disk was formed through dynamical interactions of stars, not by the merger of smaller galaxies with our own.

Astronomers have discovered a planet orbiting the nearest star outside our solar system, Proxima Centauri. The planet, designated Proxima Centauri b, is in the habitable zone of its star, where liquid water could exist. The discovery is the result of a patient search using the radial velocity method, which searches for tiny wobbles of a star caused by an orbiting planet. In addition to newly acquired data, the analysis uses spectra taken by MPIA astronomer Martin Kürster and colleagues between 2000 and 2007.

Using recent, extensive cosmological simulations, researchers at the Max Planck Institute for Astrophysics have shown that the expected signal from the Sunyaev-Zeldovich (SZ) effect of galaxy clusters on the Cosmic Microwave Background agrees remarkably well with observations by the Planck satellite. However, only a small fraction of this predicted signal is currently observable. The scientists developed a simple analytical model to understand the SZ probability distribution function, which is also helpful in interpreting the observed distribution of galaxy clusters masses.