Ross 458 ABC  
line decor
   français Deutsch
line decor

Welcome to my site!

I'm studying brown dwarfs at the Max Planck Institute for Astronomy in Heidelberg, Germany, and at the Observatoire de Strasbourg, France. These compact objects are not massive enough to sustainably burn hydrogen, so that they cool and dim with time. The first brown dwarfs have been discovered only 20 years ago when larger infrared detectors (1–2.5µm) became available.

Since then, brown dwarfs have been discovered in very different flavours: from population (thin disk, old disk, and star-forming regions; free-floating, as companions to stars -rarely though- or in binaries); effective temperatures (from ~3000K to ~300K); gravities or atmospheric dust content and properties. Some show signs of photometric variability or polarisation; some young ones have circumstellar disks.

In the pages accessible from the links in the left column, you can read information about my research related to some of the topics mentioned above.



I present the goals of the PanSTARRS1 project related to brown dwarfs and the stellar neighours of the Sun in a blog on the PanSTARRS1 blog site.

I used the UKIDSS database, the multi-band imager GROND in La Silla and the near-infrared camera Omega2000 in Calar Alto to find four new T-type nearby brown dwarfs. Read more...

in Königstuhl

Contact information
Königstuhl 17
D–69117 Heidelberg
Phone: +49.6221.528.260
Fax: +49.6221.528.246