15/05/2006 kickoff meeting / introduction 1

SIAMOIS Sismomètre Interférentiel A Mesurer les Oscillations des Intérieurs Stellaires

Seismic Interferometer to Measure Oscillations in the Interior of Stars

  

Benoît Mosser, Michel Auvergne, Thierry Appourchaux, Annie Baglin, Caroline Barban, Claude Catala, Marc-Antoine Dupret, MarieJo Goupil, Jean-Pierre Maillard, Eric Michel, Reza Samadi, Francois-Xavier Schmider, Frédéric Thévenin, Gérard Vauclair, Denis Fappani et al.

 Observatoire de Paris/LESIA, IAS, UNSA/LUAN, OMP/LATT, IAP, OCA, SESO

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Summary

1. ‘History’ of the project

2. Current status

3. A few questions for the meeting

Why this meeting ?

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Past observations

• 19901998: asteroseismology with the FTS at CFHT: observations of Jupiter: large separation, rotation, amplitudes

• 1998: tentative identification of the large separation of Procyon (Mosser et al 1998, confirmed by Martic et al 1999)

• Necessary evolution of the concept:

FTS (for ‘classical’ spectrometry) Fourier tachometer (as GONG !)

Talk: Jean-Pierre Maillard Doppler seismology with a Michelson interferometer

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Evolution of the project

• Need of a dedicated instrument: simple, robust, efficient• 2000: « ACI jeune chercheur » SIAMOIS project:

- Instrument principle- Performances (Mosser, Maillard and Bouchy 2003, PASP)

- Preliminary design: no moving parts- Network observations

• 2004: growing interest for observations at Dome C in AntarcticaNetwork single site observations at Dome C

• 2005: positive recommendation for asteroseismology at Dome C (PNPS)

1) dedicated asteroseismometerwith a small size telescopefirst wintering in 2010

2) 2-m class telescope + spectropolarimeter

Claude Catala: Performances

FX Schmider:Dome C

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Observations in Antarctica ?

Specifications for observations at Dome C

• integrated project

• dedicated small size telescope

• project has to be fully automatic, ~ spatial condition

• scientific programme- unfeasible elsewhere- ambitious- to make sense after COROT

Jean-Tristan Buey, organization of the project

Thierry Appourchaux spectrometry / photometry

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Institutional partners at Dome C

• IPEV (Institut Paul-Emile Victor)- in charge of the Concordia base; wintering since 2005- supervises scientific projects

• INSU (National Institute for Astronomy)/ Antarctic group- promotes observations at Dome C- has to identify pioneering projects in astronomy

• PNPS (National programme for stellar physics)- promotes the rapid development of an asteroseismometer at Dome C

• ANR (Agence Nationale de la Recherche) : - funding

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Current status

• Phase A in progress for the instrument many subsystems ~ off-the-shelf

• Management ~space projectScientific committeeSteering committee

• People involved (4 lab.+1 PME)Chercheurs 13.8 hommes.ansDoctorant(s) 6.0 hommes.ansIngénieurs 17.9 hommes.ansCDD 2.3 hommes.ans

• Schedule: first wintering in 2010

• Waiting on ANR funding total budget = 860 kE in 4 years, 460 from ANRresults: June

Project LESIATelescope LUANBonnette LATTInstrument LESIA+IASInterferometer SESO

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- Dome C : the only ground-based site providing a duty-cycle better than 90%

– Project : key science, for the future of asteroseismology after

– Scientific programme: a first class programme for many winterings, with a small collector

– Schedule : a rapid development for a pioneering project preparing the development of further astronomical programmes at Dome C

– Fourier tachometer: suitable concept for installation and setup at Dome C

Highlights

‘‘Big science’’  at Dome C with a budget < 1 ME

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Antarctica / network

SONG project (funded for phase A): 7 sites, Iodine cell spectrometer + 60 cm telescope Presentation of

SONG (Song meeting, march 06)

Information on GONG (Frank Hill communication at SONG meeting)- 600 k$/yr for maintenance [~ 10% of initial budget]- 7 FTE (global reduction, archiving, processing, developement)- 60 Tbytes disk space

Site 7 1

Targets Equatorial Polar

Duty cycle 70% (WET) 90%

Season 12 months 3 months

Budget High x 7 High + Opportunity

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Questions for this meeting

Scientific programme• Which science with SIAMOIS ?

- Performances, possible targets - Solar-like oscillations, asteroseismology

• Preparatory work • Complementary program• Scientific technical specifications • Requirements for the project• …

Monday afternoon talks

Tuesday morning discussion

Project and technics • Organisation• Interactions• Next steps• …

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Planning et budget du projet

• 2006 : fin de phase A + phase B- 15 & 16 mai : atelier de travail - analyse thermo-mécanique- test du concept optique- rédaction du cahier des charges des différents sous-

systèmes- design préliminaire- financement ANR ? (juin 2006)

• 2007 - printemps : PDR- automne : FDR- analyses détaillées et lancement des contrats

• 2008-2009- validation, tests, intégration- tests sur le ciel- transfert au Dôme C

• 2010 : 1er hivernage au Dôme C

Interféromètre SIAMOISJP Amans, GEPI, Obs Paris

Coût complet : 860 kEDont ANR : 460 kE

Déjà acquis 2006(ACI + CSA + PNPS) : 116 kEUn projet sol à mener dans un labo spatial