Movies and animations

The main videos used in the course of this project have been gathered here. There is first the professional data set of HI data covering the whole sky obtained by P. Kalberla and his collaborators. It organised as a movie displaying the different velocity planes. The tool (named simulator) simulating HI observations is using this data set. Second, we present the current state of the art of N-body simulations illustrating our current understanding of our Galaxy has formed. We then present the video developped for pedagogical purpose exhibiting how a kinesthetic activity could help secondary school pupils to get a better understanding of how our Galaxy rotates and how the clouds we can observe with the EU-HOUMW SRT network move.

 

The Milky Way seen in HI

Below you will find one video showing a sweep in velocity through the data cube of the LAB survey from -400 to +400 km/s. The video is presented in the Galactic centre projection. The file is large (about 8 MB)! More information on the Leiden Argentina Leiden survey (Kalberla et al. 2005) can be found here (LAB data cube).


Each plane displays the HI observation performed by a professional radio-astronomy survey at a given velocity. It starts and -400km/s up to 400km/s. These movements are further explained in the general presentation, in the kinesthetic activity and the pedagogical ressources. This data cube has been used for the simulator of observations developped for the EU-HOUMW project.

 

Formation of the Milky Way

The Milky Way is the Galaxy our Solar System lies in. It is composed of stars and gas (and probably some dark matter in the external part). It is now a large galaxy and various observations suggest that it has merged and collided with many other galaxies and has grown progressively. This movie realised by Benoit Semelin (LERMA, UPMC & Observatoire de Paris) and his collaborators displays the current state of the art of N-body simulations. It shows how we think a galaxy like the Milky Way has formed. The gas is displayed in purple and the stars in yellow.

 

This animation shows that the physics is complex and it is important to stress that any modelling necessarily implies some simplications and assumptions.

 

Modelling the Milky Way in the classroom

Alexander Rudolph (Professor of Physics and Astronomy at Cal Poly Pomona, USA, and invited Professor at University Pierre & Marie Curie, France) developped a kinesthetic activity adapted for secondary school pupils to understand how the Milky Way rotates and how you can observe the hydrogen gas with the EU-HOUMW Small Radio Telescope (SRT) network.

This event happened in the course of the « EUHOU. Hands-On Universe, Europe » training session (2-6 April 2012), which gathered at UPMC in Paris 13 secondary school teachers originating from 7 different countries. It was a kinesthestic activity applied to the modelling of the Milky Way. The trainees have hence actively participated to the proposed modelling, illustrating one technic of interactive learning. Physical concepts like solid body or differential rotation of a rotating disk have been shown as well as the Doppler red or blue-shifts of wavelengths, which can be observed in various positions or quadrants of the Galaxy.

This kinesthetic activity has to be coupled with the pedagogical ressources. Instructions for teachers directly related to the kinesthetic activity are provided. A complementary practical activity based on the use of the simulator of observation is also provided. You can also find a general presentation of the field.

 

More to come

Keep track of new developments on EU-HOU YouTube Channel