Changes between Version 270 and Version 271 of AstroTechTalk

Timestamp:

6 Mar 2017, 09:46:11 (7 years ago)

Author:

Ralph Hofferbert

Comment:

--

AstroTechTalk

@@ -34 +34 @@
 || 24.02.2017 || || ||
 || 03.03.2017 || || ||
-|| 10.03.2017 || Martin Kuerster || Demonstration of the new 100-Star-Model ||
+|| '''10.03.2017 (from 11hrs on, Lab 034)''' || '''Martin Kuerster''' || '''Demo of the New 100-Star Model[[BR]]'''[[BR]]Our model of the stars in the solar neighborhood, first shown at the last open house day, is now shining in a new light.  In the meantime it has been reconditioned, improved, and complemented.[[BR]][[BR]]Among its new features is a control electronics system that makes it possible to address selected stars or groups of stars thereby providing new possibilities for the illustration of astronomical contexts.  Integrated coordinate planes help with the orientation.[[BR]][[BR]]Our model allows observers to study fundamental astronomical questions:  Which is the most abundant type of stars?  Why can we not find most of the stars that we know from the night sky among the over 100 nearest stars in our neighborhood?  Why are there no giant stars among them, but their descendants, the white dwarfs?[[BR]][[BR]]Logistics:[[BR]][[BR]]For the demo of the model we will meet at its location in Lab 034 (basement).  We need to form groups of 20 people for this each of which will get together for 20 minutes:[[BR]][[BR]]Group 1: 11.00 - 11.20 a.m. - Language: German[[BR]]Group 2: 11.25 - 11.45 a.m. - Language: English[[BR]]Group 3: 11.50 - 12.10 a.m. - Language: German[[BR]]Group 4: 12.15 - 12.35 a.m. - Language: Englisch[[BR]][[BR]]Choose a time, but be warned that we may have to ask you to[[BR]]wait when we have already reached a group size of 20 people.[[BR]][[BR]]Talk: German/English alternating[[BR]]Slides: n/a[[BR]]Questions: German, English ||
 || '''17.03.2017 (11hrs, MPIA)''' || '''Wilma Trick''' || '''The Secret Life of the Galaxies'''[[BR]][[BR]]During dark nights the Milky Way is observable as a wide band of stars and dust in the sky. The Milky Way is our home galaxy hosting also our solar system, but is only one of one hundred billion galaxies in the whole universe. There are spiral galaxies, huge elliptic galaxies, cloud-like dwarf galaxies, and galaxies dancing around each other before they finally merge into one. [[BR]][[BR]]Where do all these galaxies come from?[[BR]]And why do they look as they look?[[BR]][[BR]]In the past decades astro physicists have act as space detectives and have collected evidence for a better understanding of galaxy formation and evolution. One of the prime witnesses: The motion of stars. This led for instance to the discovery of super massive black holes and the mysterious dark matter of which we actually know only very little, apart from its omnipresent existence and its necessity for the formation of galaxies. [[BR]][[BR]]Presentation: German[[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/AlteVortraege2017S1/2017-03-17_geheimesLeben.pdf Slides: German][[BR]]Questions: German, English ||
 || '''24.03.2017[[BR]](11hrs, MPIA)''' || '''Robert Harris (ZAH, LSW)''' || '''Photonic Reformatting'''[[BR]][[BR]]As astronomical telescopes grow in size the instruments  behind them also grow. As the individual components become bigger, they  become more difficult to manufacture, increasing the cost and making  them more fragile (meaning unless you’ve got a particularly careful PhD  student the cost of having spares also goes up). This has lead to many  instruments using techniques such as image slicing to reduce the size of  individual components and make the point spread function from the  telescope manageable. [[BR]][[BR]]Astrophotonics  is a field that aims to combat the problems of size, cost and  complexity. The idea is to take devices and technologies developed for the  field of photonics and make use of them in astronomy. In this talk Robert Harris will  describe his past, current and future work in a subfield of  astrophotonics, photonic reformatting. This is akin to image slicing,  but occurs within the fibre, meaning the devices are fully integrated. He  will discuss both theoretical and practical aspects of his work and draw  conclusions as to where he feels the field will go next.[[BR]][[BR]]Presentation: English[[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/AlteVortraege2017S1/2017-03-24_Reformatting.pdf Slides: English][[BR]]Questions: German, English ||