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Groundbased observations in preparation, support and follow-up of COROT. from preparation to support and follow-up. 1. Groundbased studies of pulsations in delta Scuti,gamma Dor, beta Cep, Be stars. Photometry: SPM, OSN, Mercator, Konkoly, APT on going since July 2004, to be continued

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Groundbased observations

in preparation, support and follow-up

of COROT


from preparation to support and follow-up

1. Groundbased studies of pulsations in delta Scuti,gamma Dor, beta Cep, Be stars

Photometry: SPM, OSN, Mercator, Konkoly, APT

on going since July 2004, to be continued

Spectroscopy: radial velocity curves, LPV (high degree modes) = complement to COROT

on going since June 2005 (OHP, FEROS)

to be continued in a more ambitious way

Possible subdivision of the tasks :

Cep (HD 180642 and HD 170580): LEUVEN (C. Aerts)

Sct FAST ROTATORS : OSN (J.C. Suarez)

(HD 181555, HD 170782, HD 170699) MEUDON (….)

HD 172189 (Sct+EA+SB2) : OSN (S. Martin)

HD 50870 (Sct ) : STEPHI (E. Michel)

HD 44283 (Sct ) : OAB (E. Poretti)

KONKOLY (M. Paparò)

HYBRID (HD 44195) : OAB (K. Uytterhoven)

Dor (HD 49434 and HD 171834) : NICE (P. Mathias)

Be stars: MEUDON (Neiner, Hubert, …)


Some highlights (1)

HD 49434,confirmation of the light variability

High precision photometry

(s.d. better than 0.002 mag)

on four consecutive nights.

Peak-to-peak amplitudes

0.022 mag in violet

0.019 mag in blue

0.016 mag in yellow

Multiperiodicity probable.

The observations planned

in December (OSN and SPM)

will be decisive to detect

periodicities.

Additional APT timeseries available.


Some highlights (2)

HD 180642, Beta Cep variable, but probably not multiperiodic

Monitored at SPM and OSN in Stromgren photometry,

with Mercator telescope in the Geneva system and

and with M. Piszkesteto telescope in V filter

Pulsational frequency term identified

as the Fundamental radial mode

(Aerts et al., in preparation)


from preparation to support and follow-up

1. Groundbased studies of pulsations in delta Scuti,gamma Dor, beta Cep, Be stars

Photometry: SPM, OSN, Mercator, Konkoly, APT

on going since July 2004, to be continued

Spectroscopy: radial velocity curves, LPV (high degree modes) = complement to COROT

on going since June 2005 (OHP, FEROS)

to be continued in a more ambitious way

2. Magnetic activity of F, G stars and Be stars:

Spectropolarimetry: Espadons @ CFHT, on going, to be continued

3. Measuring diameters of COROT targets by interferometry:

Interferometry: AMBER @ ESO/VLTI, scheduled 2006

4. Groundbased seismology of solar-type stars:

Spectroscopy: HARPS @ ESO, on going, to be continued


Strategy

1: large programme at ESO: FEROS - Vrad and LPV for dScuti, gDor, bCep, Be

PI: E. Poretti

2: large programme at OHP: Sophie - Vrad and LPV for dScuti, gDor, bCep, Be

PI: P. Mathias

3: large programme at TBL: Narval - magnetic field and LPV for FG-type, Be stars

PI: C. Catala

4: proposals on seismology with Harps (ESO 3.6m) on solar-type stars (not necessarily COROT targets)

PI: B. Mosser

5: diameters via interferometry (AMBER @ VLTI): guaranteed time + complementary proposals

PI: F. Schmider


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