Team

Détails

The ISSP team

 
more

 
 
more

 
more

 
more

Denis Mourard 
I'm the PI and conductor of the ISSP project. As PI of the SPICA instrument installed on the CHARA Array at Mount Wilson, I'm also strongly involved in any of the technical developments we are doing for improving the performance and the quality of the data. Part of my activities is dedicated to the operation of the fringe tracker (for  enabling longer exposure  time) and on the adaptive optics systems together with the CHARA team (to enable the access to fainter targets). We are also currently working on improving the sensitivity by adding the correction of atmospheric refraction before the injection in the SPICA single mode fibers. On the data side, I'm working closely with the team for improving the reliability of our management tools (pipeline, database management). On the astrophysical aspects, I'm now leading the S01 subprogram on the exoplanet host stars. A new vision of the stellar parameters on these stars will permit unprecedented results on the planets themselves, when combining the interferometric measurements with photometric or spectroscopic follow up of such systems. As conductor of the project, I'm of course following all the different programs of the team.

 
more

Mathieu Vrard

Thesis
Asteroseismology is the study of the waves going through stars, allowing to decipher the interiors of stars. The wave frequencies indeed depends on the internal structure of stars therefore bringing to the surface informations on their interiors. This technique can also be used to determine the global characteristics of the stars like their mass and radius. In this project, I am responsible of the task S02 (main-sequence stars) and S03 (subgiant and red giant stars) which concerns low-mass asteroseismic target analysis. The objective is to offer a comparison between the interferometric data, able to obtain stellar angular diameters thus stellar radius with an estimation of the parallaxe, and asteroseismic data. The objective is to strengthen the radius determination we can obtain by asteroseismology and other photometric techniques and to assess the potential of interferometry in the improvement of stellar modelisation, therefore on the extraction of the stellar parameters.

!-

Arnaud Caci

Nayeem EBRAHIMKUTTY. Engineer: machine learning on stellar atmosphere models and interferometric modeling 10/2022 - 06/2023. PhD 07/2023-07/2026

Romina IBAÑEZ-BUSTOS. Postdoc (SBC relations) from 11/2022 to 10/2025

Juraj JONAK: PhD student, 12-2022-11-2025

Denis MOURARD: PI of the ISSP project

David SALABERT: Engineer, Survey management-DRS-QCS, 09/2021-08/2024

Mathieu VRARD: Postdoc, Asterosismology & Interferometry, 01/04/2023-31/03/2026

Asteroseismology is the study of the waves going through stars, allowing to decipher the interiors of stars. The wave frequencies indeed depends on the internal structure of stars therefore bringing to the surface informations on their interiors. This technique can also be used to determine the global characteristics of the stars like their mass and radius. In this project, I am responsible of the task S02 (main-sequence stars) and S03 (subgiant and red giant stars) which concerns low-mass asteroseismic target analysis. The objective is to offer a comparison between the interferometric data, able to obtain stellar angular diameters thus stellar radius with an estimation of the parallaxe, and asteroseismic data. The objective is to strengthen the radius determination we can obtain by asteroseismology and other photometric techniques and to assess the potential of interferometry in the improvement of stellar modelisation, therefore on the extraction of the stellar parameters.

-->

The ISSP survey is managed with co-investigators considered as associate experts: Orlagh CREEVEY, Sebastien DEHEUVELS, Nicolas NARDETTO, Armando DOMICIANO, Markus WITTKOWSKI, and Karine PERRAUT

Direct collaborators

The CHARA group at Mount Wilson and Atlanta: Doug, Gail, Theo, Narsi, Nils, Chris, Nic, Rob, Karolina, Craig, Victor, Norm, Olli, Becky.

The SPICA group at OCA: Philippe, Julien, Christophe, Daniel, Fred, Alain, Isabelle and past members (Sylvain, Fatmé, Stéphane)

The JMMC group at OSUG, with a special tag for Guillaume and Laurent 

Past members

 Pierre Geneslay
more

 
more

 
more

 
more
!-

Pierre GENESLAY: Engineer, automation and commissioning of SPICA, Adaptive Optics CHARA, 09/2021-08/2023

Estelle JACQMART: mechanical engineer, 11/2021-02/2022

Roxanne LIGI. postdoc (exoplanet host stars) from 12/2022 to 11/2025

Cyril PANNETIER: postdoc (SPICA Fringe Tracker) from 1/2/2023 to 31/10/2023

-->