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Portail > Offres > Offre UMR5274-MELCOL-008 - H/F Postdoc: Exploration de la région d'accrétion/éjection magnétosphérique de jeunes étoiles avec l'interférométrie infrarouge à base longue

Postdoc: Probing the magnetospheric accretion/ejection region of young stars with long baseline interferometry

This offer is available in the following languages:
Français - Anglais

Date Limite Candidature : mercredi 20 janvier 2021

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General information

Reference : UMR5274-MELCOL-008
Workplace : GRENOBLE
Date of publication : Friday, November 20, 2020
Type of Contract : FTC Scientist
Contract Period : 24 months
Expected date of employment : 1 March 2021
Proportion of work : Full time
Remuneration : 2648 gross monthly
Desired level of education : PhD
Experience required : Indifferent

Missions

The interaction region between the inner disk and the star where magnetospheric accretion takes place extends a few stellar radii above the stellar surface, amounting to less than 1 mas on the sky. Recent advance in long baseline interferometry, most notably thanks to the ESO VLTI/GRAVITY instrument, now enables to directly probe this region (e.g. Bouvier et al. 2020; Garcia-Lopez et al. 2020). IPAG has a unique expertise in high- angular resolution imaging, has contributed to the construction of GRAVITY and is co-I of the GRAVITY+ project, co-leads the GRAVITY YSO group for the exploitation of the GTO, and includes world-leading experts of interferometric techniques.

Activities

The postdoctoral position aims at exploiting the spectro-astrometric capabilities of VLTI/GRAVITY to study the accretion/ejection process in young stellar objects. The work will involve interferometric data analysis, in close collaboration with local experts (K. Perraut). It will also include the exploitation of radiative transfer models of the star- disk interaction region being currently developed at IPAG, to compute interferometric quantities (visibilities, differential phases) on synthetic images to be directly confronted to observations. All these studies will be crucial to prepare for the future GRAVITY+ observations of YSOs. Experience in interferometric data analysis is required and expertise in numerical modeling is welcome.

Skills

The candidates applying for the position should have a PhD in physics or astronomy (Postdoc I), or in a related field (Postdoc II) relevant to the advertised positions. Interested candidates should send their curriculum vitae, a publication list, a brief statement of research interests outlining their suitability and motivation for one of the positions above, and arrange for three letters of reference.

Work Context

This position is fully supported for two years in the framework of the ERC project SPIDI: Star- Planets-Inner Disk Interactions, http://www.spidi-eu.org (Grant Agreement No 742095). The SPIDI project aims at exploring the inner regions of circumstellar disks around young stars were close-in planets are in the process of formation.

The workplace is the Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), France. Around 160 people work at IPAG, including 60 staff scientists and professors, 30 staff engineers, technicians, administrative personnel, and 70 contracted personnel, which include around 20 postdocs and 30 PhD students. Our research themes embrace the formation of solar systems, from the initial phases of the core collapse, through protostellar disk physics and chemistry, up to the study of exoplanets. We also work on accretion-ejection processes around young stellar objects and compact objects. Our activities include laboratory measurements, high performance computing, as well as the design and operation of cutting edge instrumentation for space missions and ground-based telescopes, notably for the future European Extremely Large Telescope (ELT).

The postdoctoral position offer the opportunity for astronomers to work in a world- class research environment and pursue their career in a very dynamic and competitive field of research.

The appointment is for two years and may start as early as March 2021. Funds are available for computing, publications, travel, and other needs. IPAG welcomes applicants with diverse backgrounds and experiences. We regard gender equality and diversity as a strength and an asset.

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