1. The Pre-Main Sequence Stars thematic team Jane Gregorio-Hetem Universidade de São Paulo jane@astro.iag.usp.br 2 nd CoRoT Brazil Workshop,Ubatuba, November 2005

2. Summary PMS - CoRoT: Brazilian Team Activities & international cooperation; Detailed study of variable young stars of the Pico dos Dias Survey (PDS); Possible targets for the next AOs.

3. CoRoT Pre-Main Sequence Stars Brazilian Team Activities T Tauri & Herbig Ae/Be stars - Gregorio-Hetem et al. (USP & UFMG) Young Associations – Torres et al. (LNA & ON) Debris Disks – de la Reza et al. (ON & LNA)

4. Main topics on T Tauri & Herbig Ae/Be research Sergio Vieira Marcelo Guimarães S í lvia Alencar Wagner Corradi Annibal Hetem Jr. Mar í lia Sartori Claudia Rodrigues Bruno Castilho Simone Daflon classification & SED variability & pulsation polarimetry chemical composition Status at the 1st CoRoT-Brazil Workshop, Natal (2004)

5. "PMS Cooperation" - more than 70 members! Three accepted proposals to the AO1 dealing with PMS stars: NGC 2264 (PI: Fabio Favata) > 50 members of the PMS team. Young stars in the cluster Dolidze 25 (PI: Vincenzo Ripepi) Herbig Ae/Be stars (PI: Claude Catala).

6. Letters of Interest (LOI) PMS Stars Topics: –Protoplanets –PMS variability –PMS solar-type stars –Interaction of PMS objects with circumstellar structure –PMS pulsation VV Ser & V 351 Ori V 588 Mon & V 589 Mon in NGC 2264 other open clusters (Collinder 96, Dolidze 25, …) lots of different physics involved COROT Workshop, Natal Konstanze Zwintz (Inst. of Astronomy, Univ. Vienna, Austria) Oct. 31, 2004

7. After CW7 - Granada PI: F. Favata 5 subteams with leaders –Exoplanet search in the lower mass YSOs – S. Aigrain –Interaction of YSOs with circumstellar matter – S. Alencar –Asteroseismology of PMS stars – K. Zwintz –Stellar activity and rotation – G. Micela –Asteroseismology of main sequence B stars – C. Aerts shared preparatory work – shared (possible) COROT data Short Run Proposal on NGC 2264 COROT Week 8, Toulouse Konstanze Zwintz (Inst. of Astronomy, Univ. Vienna, Austria) May 24-27, 2005

8. Protoplanets –S. Aigrain, D. Queloz, M. Irwin, L. da Silva, S. Hodgkin, T. Guillot, F. Bouchy, F. Pont, S. Zucker, C. Moutou Activity –G. Micela, E. Flaccomio, S. Sciortino, R. Jeffries, J. Stauffer, L. Rebull, J. Sanz, I. Pagano Circumstellar Matter –S. Alencar, J. Bouvier, R. de la Reza, M. Deleuil, M. Fernandez, J.F. Gameiro, J. Gregorio-Hetem, E. Moraux, C.A. Torres PMS Asteroseismology –K. Zwintz, E. Alfaro, P. Amado, J. Ballot, T. Boehm, C. Catala, A. Delgado, R. Garrido, M. Goupil, M. Marconi, J.P. Marques, M. Monteiro, F.J.G. Pinheiro, V. Ripepi, E. Rodriguez, S. Turck-Chieze Main Sequence B Stars –C. Aerts - tbd Short Run Proposal COROT Week 8, Toulouse Konstanze Zwintz (Inst. of Astronomy, Univ. Vienna, Austria) May 24-27, 2005 see talk

9. Young stars in the field of the Open Cluster Dolidze 25 PI: Vincenzo Ripepi INAF-Osservatorio Astronomico di Capodimonte, Napoli, Italy Co-Investigators: J.M. Alcala, M. Marconi, M. Cignoni, E. Covino, S. Leccia, A. Ruoppo, L. Terranegra - INAF- O.A. Capodimonte, Italy S. Bernabei - INAF- O.A. Bologna, Italy T. Boehm - OMP, France C. Catala - Obs. Meudon, Paris, France W. Corradi, S. Alencar - Universidade Federal de Minas Gerais, BH, Brazil R. de la Reza, C. Chavero - Observatorio Nacional, Rio de Janeiro, Brazil; S. Degl'Innocenti, P.G. Prada Moroni - Dip. Fisica, Universit a di Pisa, Italy M. Deluil - LAM, Marseille, France F. Favata - ESA, Netherlands M. Fernandez - MPIA, Heidelberg, Germany J. Gregorio-Hetem, J.R.D. Lepine - IAG, Sao Paulo, Brazil. M.J.P.F.G. Monteiro, F. J. G. Pinheiro - Univ. Porto, Portugal F. Palla - INAF- O.A. Arcetri, Italy C.A.O. Torres, G. Quast – Laboratorio Nacional de Astrofisica, Itajuba, Brazil K. Zwintz, W. Weiss - Institute of Astronomy, Vienna, Austria

10. Detailed Study of Variable PDS pre-main sequence stars Target Selection to the CoRoT AP Fabio P. Santos et al. PDS090; PDS091 (T Tauri); NGC6633 PMS candidates to the CoRoT AP Wagner Corradi et al. PDS530 (Herbig Ae/Be) Poster #3 Poster #11

11. Ground Based Observations at OPD Pico dos Dias Observatory (Minas Gerais) IAG 60cm telescope BVRI photometry 4 missions x (5 nights) three weeks intervals Monitoring ~ 10 fields

12. PDS 530 (star #2) and nearby candidates (stars #1, 4 & 5) #3 and #6 are comparison stars PDS530

13. Spectral Characteristics PDSST W(H ) Å W(Li) Å ClassaIRSc % 090K4-510.58WTT-1.429 091M0-540.35CTT-0.865 530F0-50---HAB+0.583

14. T Tauri HAeBe H line profile related to the interaction with the circumstellar matter

15. T Tauri IR Classification Evolutionary Sequence

16. André et al. (1994)

17. Evolutionary scenario for HAeBe stars suggested by Malfait et al. (1998)

18. Comparing the SEDs

19. Herbig Ae/Be & T Tauri classes Distribution of the spectral index, IR, as a function of Sc, for the 3 groups. The divisions of the TT classes are indicated by dashed horizontal lines and the approximate limits of Sc for the 3 groups are indicated by vertical dotted lines. (Sartori 2003 BAS Meeting) x 90 x 91 530 x

20. Protoplanetary disks Different Models, based on different geometries (see next talk)

21. Possible Candidate Targets for next AOs Prime target Number of candidates Distance from the prime target Objects HD49933 16 0.7 o - 1.9 o NGC2301,Bochum 2, Dolidze 25, PDS229N HD170580 1 2.6 o NGC6633 HD171834 7 0.9 o - 1.9 o IC4756, PDS530E HD177552 10 0.2 o - 1.0 o Berkeley 81, five X-ray sources HD181555 7 1.9 o - 3.0 o NGC6775, three X-ray sources HD 52265 24 0.5 o - 2.7 o HBC547, PDS229N, PDS234, PDS241, NGC2302, Bochum 3, Haffner 3, NGC 2338 HD 43587 13 1.6 o - 3.0 o Collinder 91, Dolidze 22 Object Number of candidates Distance from the center field Comments Cluster 133.9 o - 5.0 o HBC665N, PDS520, HBC285 Cluster 254.4 o - 6.8 o HBC684N, four X-ray sources Cluster 3174.5 o - 6.8 o PDS518, HBC284N, Trumpler 35, seven X-ray sources Cluster 458.0 o NGC2219 (anti-center) Other 123.0 o - 7.0 o Several stars from the HBC, PDS and Tycho Catalogs distributed in both, center and anti- center directions).

24. The Pre-Main Sequence Stars thematic team Jane Gregorio-Hetem Universidade de São Paulo jane@astro.iag.usp.br THANK YOU! 2 nd CoRoT Brazil Workshop,Ubatuba, November 2005