Dr. Annie Baglin, COROT Principal Investigator, CNES

HAG – two years of the Hungarian CoRoT project

Margit Paparó

HAG

Hungarian Asteroseismology Group

COnvection ROtation and planetary Transits (ESA and COROT homepages)

Made by Zoltán Kolláth

Investigation of convection: one of the main goal

Home page of Joergen Christensen-Dalsgaard

Investigation of rotation: one of the main goalRotation of the Sun: clearly visible by sunspots

Joergen Christensen-Dalsgaard

How we joined and where we work for CoRoT

Telescopes in work at Konkoly Observatory

Photos by Miklós Rácz

Hungarian Asteroseismology GroupEstablished: 2005 -

Participants: Margit Paparó D.Sc. – project scientist

Zoltán Kolláth D.Sc. – guest investigator of CoRoT

Zoltán Csubry PhD student

József Benkő PhD

Sódorné Bognár Zsófia PhD student – employee by HAG

László Szabados D.Sc.

Róbert Szabó PhD

László Molnár student – employee by HAG

Krisztián Sárneczky – PhD student – employed for 5 month

Honorary members of HAGPISTA – Piszkéstető Student’s Astronomy ELTE University

• Eszter Bokor• Gyöngyi Kerekes• András Már• László Molnár• Emese Plachy• Péter Pápics • Nándor Sztankó

Fields of activitiesFields of activities

• Photometric characterization of seismo Photometric characterization of seismo targetstargets

• Time series photometry of exofieldsTime series photometry of exofields

• Guide for subfield selection: ROTSE-IGuide for subfield selection: ROTSE-I

• Successful applications:Successful applications:

- Low amplitude variation of classical - Low amplitude variation of classical

pulsating stars (GI Zoltán Kolláth)pulsating stars (GI Zoltán Kolláth)

- Blazhko and double mode RR Lyrae - Blazhko and double mode RR Lyrae starsstars

(headed by Merieme Chadid, France)(headed by Merieme Chadid, France)

Pulsating stars studied by Pulsating stars studied by COROTCOROT

• Radial region: Radial region: long periods – long periods – exofieldsexofields

• Non-radial region: Non-radial region: main sequence – main sequence – shorter periodsshorter periods

Joergen Christensen Dalsgaard

Simplest waves

Made by Zoltán Kolláth

Targets of asteroseismology: existing Targets of asteroseismology: existing oscillationsoscillationsamplified by 100000 (David B. Guenther)amplified by 100000 (David B. Guenther)

Propogation of wavesPropogation of waves with different parameterswith different parameters

• White White – – ll = = 00

• BlueBlue – – ll = = 22

• GreenGreen – – ll = = 2020

• YellowYellow – – ll = = 2525

• RedRed – – ll = = 7575

Joergen Christensen-Dalsgaard

Method of inversion – Method of inversion – asteroseismologyasteroseismology

Differential layer between Differential layer between GreenGreen and and YellowYellow waves is waves is investigatedinvestigated

Many waves – many layers are studied

Joergen Christensen-Dalsgaard

Data obtained for Theta Data obtained for Theta TucanaeTucanae6 weeks, three sites – single site 20 years 6 weeks, three sites – single site 20 years earlierearlier

First step of inversionFirst step of inversionfinding the frequencies of wavesfinding the frequencies of waves

• 10 waves were 10 waves were identifiedidentified

• Binary nature Binary nature was discoveredwas discovered

• SpectroscopicallSpectroscopically confirmed y confirmed laterlater

Photometry of seismo Photometry of seismo targets Itargets I

•Summer targetsSummer targets: :

2005 20062005 2006

HD 181555 3 8 HD 181555 3 8 nightsnights

HD 180642 2 5HD 180642 2 5

HD 170782 - 3HD 170782 - 3

Photometry of seismo targets IIPhotometry of seismo targets II

•Summer Summer targets:targets:

2005 20062005 2006 HD 172189 2 - HD 172189 2 -

nightsnights

•Winter targets:Winter targets:

HD 44195 8 3HD 44195 8 3

HD 44283 4 3HD 44283 4 3

Photometry of seismo targets Photometry of seismo targets IIIIII

•Winter targets:Winter targets: 20062006• HD 50844 7 nightsHD 50844 7 nights

•Other objectsOther objects HD 48434 – Gamma HD 48434 – Gamma

DorDor starstar• V920 Aql – RR Lyrae V920 Aql – RR Lyrae

starstar on the exofieldon the exofield

Time series: Schmidt telescope Time series: Schmidt telescope (90/60 cm)(90/60 cm)

Time series on exofield of Time series on exofield of HD 49933+ HD 49434HD 49933+ HD 49434

selection on star density or well-known star in the selection on star density or well-known star in the fieldfield

More effective selection of More effective selection of subfields:subfields:ROTSE - IROTSE - I

Posters on 8. CoRoT week:Posters on 8. CoRoT week:

József M. Benkő and Zoltán CsubryJózsef M. Benkő and Zoltán Csubry ROTSE-I All Sky Survey as a Tool of ROTSE-I All Sky Survey as a Tool of

Target Selection in the COROT Target Selection in the COROT FieldsFields

Zoltán Csubry, Zoltán KolláthZoltán Csubry, Zoltán Kolláth

MUFRAN – A scriptale data MUFRAN – A scriptale data

processing tool for variable starsprocessing tool for variable stars

New variable stars in the COROT New variable stars in the COROT eyeseyes

Made by Zoltán Kolláth

Strange modes in stars

COROT data will be analized here

Cepheid horn: oscillations are the same as in the star

I gave a large scale view of the Hungarian activity in the COROT scientific preparatory work. My

colleagues will give the details and colours of this picture. HAG wish you a

pleasant Hungarian COROT Day!

Thank you