Ecole Internationale Daniel Chalong

Workshop CIAS Meudon 2010




CIAS Observatoire de Paris, Château de Meudon, Meudon campus

8, 9, 10 and 11 June 2010

Programme and Time Table (.pdf)

Practical informations (.pdf)

Click to download the poster (.pdf)

Programme and Lectures (.pdf)

List of Registered Participants (.pdf)

Album Photos

Highlights and Conclusions of the Colloquium (.pdf)

Highlights and Conclusions


The Workshop addresses the problem of Dark Matter in the Universe and the Universal properties of Galaxies. An effort of clarification and synthesis will be made by combining in a conceptual framework, theory, analytical, observational and numerical simulation results. The subject will be approached in a threefold way:

(I) Conceptual context: Dark Matter in cosmology and astrophysics: current status, perspective and prospective of the research in the subject: theory and observations

(II) Astronomical observations linked to the galaxy structural properties and especially to the universal properties of galaxies: high quality rotation curves, kinematics, density profiles, gravitational lensing, small and large structures.

(III) Numerical simulations, large structures, structures and substructures.

Special attention will be payed to the astrophysical understanding of the dark matter problems, the use of analytic and numerical methods to determine the properties, the distribution and the nature of dark matter.

TOPICS: Kinetic theory and the recent progress in solving the Boltzmann-Vlasov equation to obtain the observed universal properties of galaxies. N-body numerical simulations.

The dark matter surface density in galaxies.

The phase-space density of dark matter.

Particle model independent analysis of astrophysical dark matter.

The mass of the dark matter particle at the keV scale as determined from theory combined to observations and numerical simulations.

The impact of the mass of the dark matter particle on the small scale structure formation and the choice of the initial conditions.

The radial profiles and the Dark Matter distribution. Cores versus Cusps.

The recently highlighted keV scale Dark Matter.


FORMAT: All Lectures are followed by a discussion. All participants are invited to take part in the discussions.

Enough time will be available for the discussions.

The Meeting is open to all scientists interested in the subject. Registration is mandatory. Registration information is given below.

The format of the Meeting is intended to allow easy and fruitful mutual contact and communication.

Sessions last for four full days in the beautiful and green Meudon campus of Observatoire de Paris in the historic Castle with the Great Dome building ("Château Grande Coupole") where CIAS (Centre International d´ Ateliers Scientifiques) is located.

All lectures and presentations will take place at the Castle Conference Room (Salle de Conferences du Château) in the historic Castle building.

All Coffee-Tea breaks will take place at the Urania Hall aside the castle conference room in the same building. The Registration desk and the Secretariat of the Workshop take place at the Urania Hall.

Discussions and working sessions all during the workshop will take place at the CIAS rooms aside the Urania Hall.

SOC et LOC :

Norma G. Sanchez, Héctor J de Vega, George F. Smoot, Maria Cristina Falvella.

Nicole Letourneur, Aurelie Sevellec, Djilali Zidani.


Peter BIERMANN (MPI-Bonn, Germany & Univ of Alabama, Tuscaloosa, USA)
Astrophysical Dark Matter, keV scale particle and fermion condensates

Alfonso CAVALIERE (Dipt Fisica/Astrofisica, Unuv Roma 2 Tor Vergata, Italy)
The Intra Cluster Medium in Dark Matter Halos

Hector J. DE VEGA (CNRS LPTHE Univ de Paris VI, France)
Galaxy properties from linear primordial fluctuations and keV scale dark matter from theory and observations

Gianfranco GENTILE (Math Physics & Astronomy, Univ of Ghent, Ghent, Belgium)
Surface densities and dark matter properties in galaxies

Yehuda HOFFMAN (Racah Inst of Physics, Hebrew Univ, Jerusalem, Israel)
Dark matter halos with and without baryons

Anatoly KLYPIN (Dept. of Astronomy, New Mexico State University, USA )
Stefan GOTTLÖBER(Astr Inst Postdam, Postdam, Germany)
Dark matter halos from N-body simulations. Bolshoi N-body Cosmological Simulation

Andrea LAPI (Dipt Fisica/Astrofisica, Univ Roma 2 Tor Vergata, Rome, Italy)
Probing Dark Matter Halos in Galaxies and their Clusters

Jounghun LEE (Dep. Phys. & Astronomy, Seoul National University, Seoul, South Korea)
Bullet Clusters and its Cosmological Implications

Andrea V. MACCIO (Max Planck Institut für Astronomie, Heidelberg, Germany)
Dark Matter at small scales: the lesson from Milky Way satellites

Paolo SALUCCI (SISSA-Astrophysics, Trieste, Italy)
Universality Properties in Galaxies and Cored density Profiles

Norma G. SANCHEZ (CNRS LERMA Observatoire de Paris, Paris, France)
Galaxy properties, keV scale dark matter from theory and observations and the power of linear approximation

Pasquale D. SERPICO (CERN-Theory Division & LAPTH Annecy-le-Vieux, France)
Astrophysical explanations of the cosmic positron excess in Pamela and Fermi

George SMOOT (LBL, Univ. of California, Berkley, USA & Univ Denis Diderot, Paris, France)
Dark Matter in the Standard Model of the Universe

Rainer STIELE (Inst Theor Phys, Heidelberg University, Heidelberg, Germany)
Cosmological bounds on dark matter self-interactions

Janine VAN EYMEREN (Univ of Manchester UK & Duisburg-Essen, Germany)
Non-circular motions and the Cusp/Core discrepancy in dwarf galaxies

Matthew G. WALKER (Institute of Astronomy, University of Cambridge, UK)
A universal mass profile for dwarf spheroidal galaxies

Markus WEBER (Inst für Experimentelle Kemphysik, Karlsruher Inst. für Technologie KIT, Karlsruhe, Germany)
The determination of the local Dark Matter density

Gustavo YEPES (Grupo de Astrofisica, Univ Autonoma de Madrid, Cantoblanco, Spain)
How warm can dark matter be ?. Constraining the mass of dark matter particles from the Local Universe



Local and practical information can be found below.


The Meeting is open to all scientists interested in the subject but Registration is mandatory. Registration fee is 60 Euros. The registration fee covers the 8 coffee-tea breaks, the tickets for the 4 lunchs and the cocktail/reception. The registration fee must be paid cash to the Secretary of the Workshop (not by credit card, nor by check) at the registration desk on the 1st day of the Workshop (Tuesday 8 June 2010).

Certificates of participation and receipts will be delivered by the Secretariat during the Workshop upon request.

Participants wishing to attend the Meeting should register in time, by on line registration and in any case           

BEFORE 1st MAY 2010

An automatic mail  is sent to you after your on line registration.


The LIST of Registered confirmed Participants will be posted in May.  BADGES for all registered confirmed participants in the list will be available at the Registration desk from Tuesday 8 June at 8:10 am.

Please wear your badge all during the Workshop, which will make easy your access and circulation within the Paris Observatory Meudon campus.


Workshop Secretariat:

We look  forward to seeing you in Meudon for a creative, fruitful and enjoying meeting.

Hotel reservations for the invited Lecturers and their accompanying persons will be provided by the Colloquium organizers.

Participants should make their reservations by their own. A list of hotels in Paris nearby Montparnasse station is provided below.


Welcome of the participants and Registration starts on Tuesday 8 June at 8:00 am at the Urania Hall in the historic Meudon Castle ("Château de Meudon"). Tickets for lunch will be on sale at the registration desk from Tuesday morning.

Lectures start on TUESDAY 8 JUNE at 9:00 am in the Castle ("Chateau") CIAS building .

We shall  strictly stick to the timetable during the whole meeting.

All lectures and events will start  at the indicated times sharp.

All sessions take place in the historic Castle ("Château" building) where CIAS is located ,

All COFFEE-TEA-MATE-CHAMPAGNE BREAKS take place in the Urania Hall in the CIAS Château building.

LUNCH is served at the Self-service Restaurant of Observatoire de Paris at Meudon (located very near from the "Château" building, inside the Meudon campus, around the pond).

The PHOTO of the group will be taken in the middle of one of the main entries of the "Chateau".

The COCKTAIL/RECEPTION for all participants and accompanying persons will be offered on FRIDAY 11 JUNE in the late afternoon at the terrasse (if weather allows it) aside Urania Hall; otherwise, inside the Castle.

Please Notice: The Workshop ends after the COCKTAIL/RECEPTION in the late afternoon of Friday 11 June. All participants and lecturers are expected to stay untill the end of the Meeting.

LOCATION : The entrance of the Observatoire de Paris at Meudon is 5, Place Jules Janssen, F-92 190 Meudon (see below how to reach Meudon).

Lunch is served at the Self-service Restaurant of Observatoire at Meudon (located very near from CIAS Castle, inside the Meudon campus, around the pond). The tickets for lunch will be available at the Conference registration desk from Thursday morning.

On Friday, there will be a Cocktail/Reception in the the late afternoon in the Urania Hall/terrasse.

The Observatoire Self-Service Restaurant is closed for dinner and on Saturdays /Sundays.

Some Restaurants are listed below.


Address : 5, Place Jules Janssen, F-92 190 Meudon .Tel: .Fax:

 Longitude : 2° 14' East . Latitude : 48° 48' North . Altitude : 162m

Meudon Observatory is located Place Jules Janssen , in Meudon at the top of the Avenue du Château.

By train. The best way for visitors to reach Meudon Observatory is from Paris-Montparnasse train station and to stop at Bellevue station (recommended stop). The travel duration by train from Paris Montparnasse to Bellevue station is about 12 minutes. Recommended way is the following:

By train (French railways - SNCF): At Paris-Montparnasse station, take the train going to Sèvres or to Versailles-Chantiers, Rambouillet, Chartres, (which frequency is every 15 min.). Make sure that the train stops at the Meudon or Bellevue stations. Get out at the 4th station: Bellevue (after Vanves-Malakoff, Clamart and Meudon stations).

Once outside Bellevue station, turn left (passing the church aside the station) and take the green Avenue du Château bordered by trees: the entrance of the Observatory is on the top of the hill. About a 10/15 minutes walk to reach the gates of the Observatory. [There is also a mini bus (circular local line) from the Bellevue station to the Observatory].

If you stop at the Meudon station: outside the station, turn to the right, after 200 m turn again to the right to take avenue Corbeiller [where the Meudon Municipality is located (Mairie de Meudon), ahead up to the top of the hill along avenue Corbeiller, rue Jacqueminot lined with stately chestnut trees.

Once arrived, use the map of the Observatory campus: Chateau Grande Coupole CIAS where the meeting takes place, (building 9 in the map) is on the terrasse (take the staircase in the garden at the left after the entry and then at the left straight on the road along the terrasse bordered by the chestnut trees.

By car there are 2 possible routes : Take the périphérique, exit at Quai d Issy, then go towards Issy les Moulineaux, Sèvres and finally Meudon Take N 118, from the Pont de Sèvres, going towards Chartres Orléans, exiting at Meudon Sèvres and then going towards Meudon.


Hôtel du Maine; 16 Rue Maison Dieu, Paris, 75014

Hôtel Ibis; 71 boulevard de Vaugirard, Paris, 75015

Hôtel Montparnasse-Daguerre; 94 rue Daguerre, Paris, 75014

Hôtel Campanile - Maine Montparnasse; 146 Avenue du Maine, Paris, 75014

Hotel l'Aiglon, 232 boulevard Raspail, metro Raspail, tel. 33 (0) 143208242,

Hotel Delambre 35 rue Delambre, metro Edgar Quinet, tel. 33 (0) 145389176,

Hotel de la Paix, 225 boulevard Raspail, metro Raspail,tel. 33 (0) 143353263,

Mercure Raspail Montparnasse, 207 bd Raspail, Paris 75014 .Tel.33 (0). 14320-6294, fax 33(0).14327-3969.

Hotel du Midi, 4, Av. René Coty, Paris 75014. Metro : Denfert-Rochereau. tel. 33(0).14327-2325. fax 33(0).14321-2458.


La Closerie des Lilas, 171, boulevard Montparnasse. Tel. 014051-3450.Open everyday till 1 am.

Formerly a Café littéraire had as customers Baudelaire, Verlaine, Gide, Jarry, Apollinaire, Modigliani, Hemingway, Lenin and probably Trotsky. Keeps a litterary crowd of customers like Philippe Sollers. The present chef Jean-Pierre Cassagne has renovated the house and the excellent meals. Besides the restaurant there is `brasserie' where meals are alsoserved. Menu 43 euros (including wine), à la carte 90 euros.

La Rotonde Montparnasse, 105 bd. Montparnasse, Tel. 0143266884. Open every day from 12 am till 1pm. Typical parisian restaurant since 1911.  Seafood, oysters, famous Salers entrecote, good fish, selected Auvergne cheese and good desserts. Landmark of the Montparnasse district had as regular customers artists, musicians, writers and politicians: Modigliani, Picasso, Soutine, Cocteau, Diaghilev, Debussy, Nijinski, Stravinsky, Man Ray (and Kiki), Breton, Aragon, Prevert, Queneau, Hemingway, Gershwin, Henry Miller, Scott Fitzgerald. Meetings of Trotsky with fellow bolcheviks in the first floor room to organize the 1917 russian revolution were often interrupted by the french police. Menus 35 and 43 euros.

La Coupole, 102 bd. Montparnasse, Tel. 0143201420.   Open every day from 12 am till 1 pm.

Typical Art Deco parisian restaurant open in 1927. Seafood, salmon rilletes, abundant sauerkraut, fresh codfish a la plancha, entrecote with french frites, lamb curry india style, excellent desserts. Among regular customers in the past: Cocteau, Prevert, Sartre, Beauvoir, Picasso (who met here Dora Maar), Matisse, Piaf, Montand.



At present the Observatoire de Paris owns three campuses: Paris, Meudon and the radioastronomy station at Nançay. More than 700 scientists, technicians and administrative staff work there.

The history of the present Meudon Castle (Château de Meudon) starts several centuries ago.

The new Château de Meudon over where the cupola of the Meudon Observatory is installed was built in 1706 by the great architect Jules-Hardouin Mansart in orders by King Louis XIV for his son the Grand Dauphin. This was the last important project realized by Mansart. The gardens and water fontaines were constructed under the plans by Le Nôtre. Important visitors stayed in the Château de Meudon in the XVIII century as the Zar of Russia Peter the Great and the King of Poland Stanislas Leszczyski.

After the French Revolution, a workshop to construct military balloons was settled in the area. These balloons played an important rôle in the Fleurus battle against Austria in 1794. Napoleon restaured the Château de Meudon and the Empress Marie-Louise and their son (the King of Rome) lived in the Castle.

The terrasse was used by the prussians to shell Paris during the siege of 1870. The Château de Meudon took fire at that time.

In 1876 the astronomer Jules Janssen created the Meudon Observatory and in 1893 a refraction telescope was installed over in the Castle.



Museums at Meudon

Musée - Atelier Rodin , Villa des Brillants Beaux-Arts. House-workshop and garden of the artist. Original casts of the work of the great sculptor. The Tomb of the sculptor with one his versions of the "The Thinker".

Musée d'Art et d'Histoire de la Ville de Meudon Beaux-Arts - Histoire

Fondation Arp à Clamart 1.8 km (sud-est limit of the Meudon forest). House-workshop and garden of the artists Jean Arp and Sophie Taeuber who designed the house in 1960. Epured Cubism. Abstraction and Dadaisme. Kandinsky "Blaue Reiter"mouvement of 1912. Max Ernst, Tristan Tzara, Constructivist Théo Van Doesburg. Original and asttonishing constructions in the "Triangle des Châtaigniers" (Chestnuts Triangle) designed by Chemetov, Déroche and Lecaron architects.


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