Today:
tba
Vipilan Sivanesan
09:15
Old and recent puzzles in Flavour Physics
Prof. Dr. Gino Isidori
16:30
Upcoming:
Autoencoder networks
Jennifer Thompson
Tue, 22 Jan 2019, 15:00
Phase coherence measurements via polarization echoes
Patricia Kuntz
Tue, 22 Jan 2019, 16:00
Dragonflies, dark matter, and the hunt for ghostly galaxies
Pieter van Dokkum
Tue, 22 Jan 2019, 16:15
Belle II
Dr. Carsten Niebuhr
Tue, 22 Jan 2019, 17:00

Dragonflies, dark matter, and the hunt for ghostly galaxies

Pieter van Dokkum , Yale University
The talk will highlight the latest results on "ultra diffuse" galaxies, ghostly objects that are as large as the Milky Way but 100x-1000x fainter. They were discovered with the Dragonfly Telephoto Array, a little telescope that we built in New Mexico, and they look different from all other known classes of galaxies. Follow-up work with the Keck telescope and the Hubble Space Telescope has revealed that what we can't see of the galaxies is even stranger: their dark matter does not "play by the rules" but seems to be present in large amounts for some and too little for others. The talk will discuss these developments, and also look forward to what we hope to learn in the future.
Heidelberg Joint Astronomical Colloquium
22 Jan 2019, 16:15
Philosophenweg 12, Großer Hörsaal

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