1) 13ème Rencontre des utilisateurs du CFHT
L'enregistrement pour la 13ème Rencontre des utilisateurs du CFHT est maintenant ouvert. Pour de plus amples informations, veuillez consulter l’adresse suivante: https://www.cfht.hawaii.edu/en/news/UM2022/index.php. La date limite pour vous enregistrer est le 15 avril 2022.
Laura Parker et Daniel Devost.
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Rappel: La date limite pour soumettre une lettre d'intention si vous êtes interressé à soumettre une demande de temps pour un Grand Programme au CFHT est le 15 février 2022.
https://www.cfht.hawaii.edu/en/science/LargePrograms/LP22B/index.php
Transmis par Daniel Devost
2) Message du GdR PILSE | Supports Expérimentaux pour le développement de missions spatiales
Le COPIL du GdR interdisciplinaire INSU/INC Pôle Inter-Laboratoires de Supports Expérimentaux pour le développement de missions spatiales (PILSE) souhaite vous informer de sa mise en place effective depuis le 1er février 2022.
Ces dernières années ont été marquées par différentes missions spatiales passées ou en cours telles que Hayabusa et Hayabusa2, OSIRIS REx, Rosetta et Mars Science Laboratory, qui ont montré le besoin de collaboration entre
les équipes de recherche en astrophysique, astrochimie et astrobiologie, qui simulent expérimentalement et/ou modélisent en laboratoire les objets du système solaire considérés,
les équipes, notamment en cosmochimie, qui caractérisent par de nombreuses techniques analytiques la matière organique/minérale extraterrestre,
les équipes responsables d’instruments embarqués sur des missions spatiales.
Cette interaction permettrait de développer une approche interdisciplinaire indispensable à l‘analyse et à l’interprétation des données issues de missions spatiales. Cette approche aidera notamment à répondre aux questions de l’évolution physico-chimique des corps célestes et plus spécifiquement à la chimie des origines de la vie.
La France regroupe plusieurs laboratoires experts dans ces domaines mais actuellement sans interactions formelles. Le Groupement de Recherche PILSE se propose donc de réunir les acteurs dans le domaine de l’astrophysique et de l’astrochimie de laboratoire et de l’exobiologie ayant pour objectif de venir en support aux missions spatiales actuelles et de répondre aux futurs besoins analytiques. Par ailleurs, ce GdR pourra également contribuer à la définition et à la conception de nouveaux instruments embarqués. Enfin, il permettra de créer une vitrine nationale autour de ces activités et de favoriser la visibilité des différentes compétences nationales disponibles dans ce domaine.
Un site web va très rapidement être mis en place où vous pourrez retrouver toutes les informations que vous souhaitez.
En attendant, si vous avez des questions ou si vous souhaitez vous associer à cette démarche, vous pouvez contacter la direction du GdR PILSE.
PILSEment vôtre.
Le COPIL
Transmis par Grégoire Danger
3) 2022 Exoplanet Summer Program at the Other Worlds Laboratory, UC Santa Cruz
The Other Worlds Laboratory (OWL) at the University of California, Santa Cruz (UCSC) announces the fourth Exoplanet Summer Program (ESP), from June 27-July 22, 2022. Within the program we wish to foster new and existing research collaborations by outstanding visitors, with stays of 1 to 4 weeks. Funding is provided by the Heising-Simons Foundation.
Program: The purpose of the program is to allow visitors to generate new ideas, nurture existing research projects and collaborations, and foster new ones. There is no theme or focus area -- in this fast-moving exoplanets field we want the participants to drive the discussion and work on areas they feel is most pressing and exciting. The ESP program is modest in terms of planned activities, besides a daily coffee and a seminar with active discussion. It is not a conference, and is mostly unstructured. It is a workshop to imagine and make progress on new ideas. Participants can expect access to shared offices on campus, discussion common areas, and of course immersion in Santa Cruz’s natural beauty.
Eligibility: Faculty, researchers, postdocs, and graduate students at any level are invited to apply. We expect to fully reimburse travel expenses for faculty, postdocs, and graduate student participants. We are particularly interested in supporting researchers from backgrounds and from regions of the world that are underrepresented in exoplanetary sciences today.
Apply : Please send a 2-page PDF that clearly covers the following areas:
--The science that you would like to accomplish while in Santa Cruz, the proposed dates of your stay, and the science connections that you see with faculty, researchers, or students within the OWL.
--Please also include a CV of up to 2 pages.
--Graduate students should also arrange for a brief supporting letter from their PhD advisor.
The current roster of planetary investigators and research at UC Santa Cruz can be found at http://owl.ucsc.edu/. We particularly welcome joint applications by small groups wishing to work together on projects. All application materials should be e-mailed to Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser.
Information: UC Santa Cruz has a campus vaccination requirement, and, currently, an indoor masking requirement. We will make future appropriate COVID-related safety decisions based on the state of pandemic in June 2022. On-campus housing is available for OWL Summer visitors. Please contact OWL administrative assistant Naomi Epps by e-mail at Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser., with additional questions about the ESP program.
Best wishes,
Jonathan Fortney
4) The inner disk of young stars: accretion, ejection, and planet formation | May 7-13, 2023 | Cargèse, Corsica, France
We are glad to announce the conference “The inner disk of young stars: accretion, ejection, and planet formation” that will be held from May 7 to 13, 2023, in Cargèse, Corsica, France.
Website: https://spidi23.insight-outside.fr/
The Kepler satellite has revealed thousands of planets orbiting within a few 0.1 au’s from their host stars. The conference will address the origin of these abundant close-in multi-planetary systems by exploring the environmental conditions that prevailed at the time of their birth within the inner astronomical unit of circumstellar disks. Building on the state-of-the art observations and models of inner planets, disks and outflows, it will address our understanding of inner planet formation and evolution, accretion/ejection processes at the inner disk edge, and star-planet-inner disk interactions.
The meeting will take place at the Institut d’Etudes Scientifiques de Cargèse (IESC) Corsica, France, from May 7 to 13, 2023.
The preliminary program includes the following scientific sessions: i) inner planet formation, ii) young inner planet detection, iii) inner disk structure, iv) the accretion/ejection connection, v) star-planets-inner disk interactions, vi) the inner disk in context: linking the inner and outer scales, vi) clues from Solar System planets and minor bodies, vii) future and prospects.
The conference will gather experts of the field and promote the participation of young researchers and PhD students. Review and contributed talks will be completed by dedicated poster sessions. The conference will be limited to 100 participants to accommodate the maximum capacity of the conference center's amphitheatre. Registration is not yet open. However, you may pre-register on the website of the conference to receive the announcements related to the conference (important dates, scientific program, invited speakers, registration, abstract submission, etc.).
SOC: S. Alencar, C. Baruteau, J. Bouvier (Chair), S. Cabrit, G. Chauvin, C. Dougados, S. Edwards, C. Manara, S. Matt, K. Perraut, C. Zanni
LOC: J. Bouvier, C. Dougados, C. Dupoux, T. Graff, A. Oikonomou, K. Perraut
5) The 23rd International Mineralogical Association General Meeting | Lyon, France | 18-22 July, 2022
The 23rd International Mineralogical Association General Meeting will be held in Lyon (France) this summer (18-22 July).
A large group of sessions is dedicated to Extraterrestrial mineralogy :
Alteration mineralogy on Mars: insights from orbit, in situ robotic exploration and meteorites
Carbon in the Solar System
High pressure minerals in meteorites: trusty reporters of shock conditions?
Ice in the solar system
Mars mantle mineralogy
Mineralogy, petrology, and geochemistry of C-type asteroid Ryugu and Solar-System small bodies
Minerals under extraterrestrial conditions
Mission minerals: Exploring our solar system’s mineralogy through remote-sensing, landed, and sample-return missions
Primary mineralogy on Mars : insights from orbit, in situ robotic exploration and meteorites
Progress in Mineralogy inspired by planetary science discoveries
The minerals and the fluids of the ocean worlds
The abstract deadline is April 22d 2pm pacific and here is the link for abstract submission: https://www.ima2022.fr/abstract-submission/22
We wish to welcome you in Lyon this summer!
Razvan Caracas – President of the IMA2022
Herve Cardon – Executive director
Cathy Quantin-Nataf – Vice-President
6) Poste de maître de conférences Sorbonne Université affecté à l'IAP | Recherche et caractérisation d’exo-planètes
Chères et chers collègues,
Sorbonne Université vient d'ouvrir ses concours, notamment celui pour le poste de maître de conférences affecté à l'IAP et avec le profil "Recherche et caractérisation d’exo-planètes".
Les candidatures seront closes le 4 mars 2022, et les informations sont disponibles ici :
https://recrutement.sorbonne-universite.fr/fr/personnels-enseignants-chercheurs-enseignants-chercheurs/enseignants-chercheurs/recrutement-2022-des-enseignantes-chercheuses-et-enseignants-chercheurs/postes-ouverts-par-la-faculte-des-sciences-et-ingenierie.html
Transmis par Guillaume Hébrard
7) Poste de professeur (PU, section 34) au CRAL à l’ENS-Lyon Un poste de professeur (PU, section 34) est ouvert au CRAL à l’ENS-Lyon dans l’équipe de l’ENS pour la rentrée 2022.
L’intitulé générique est ‘Astrophysique théorique’, recouvrant les thématiques générales de l’équipe.
Le poste paraîtra sur le site GALAXIE et sur le site de l’ENS-Lyon le 24 février prochain (cloture du dépôt des dossiers le 31 mars):
https://www.galaxie.enseignementsup-recherche.gouv.fr/ensup/cand_postes_GALAXIE.htm
Pour tout renseignement supplémentaire contacter Gilles Chabrier (Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser.)
https://cral.univ-lyon1.fr/spip.php?rubrique39
8) Postdoc in Protoplanetary disk simulation and links with cosmo-chemistry at IPGP (Paris)
Applications are invited for a postdoctoral position at Institut de Physique du Globe
de Paris (IPGP), located in the historical center of Paris (France). The fellowship is
funded by the French National Agency for Research (ANR) within the project
DISKBUILD. The ANR DISKBUILD project aims to understand the formation and
evolution of protoplanetary disks, during the infall of the molecular cloud, by
fostering a multi-disciplinary collaboration between planetary science, interstellar
medium and cosmo-chemistry. Special emphasis is given to explaining dust
composition, accretion timescale and comparison with meteoritic records for our
Solar Nebula.
The proposed research project, at the core of the DISKBUILD collaboration,
addresses the chemical composition of dust species during their condensation,
evaporation and transport in the Solar Nebula focusing on the region of terrestrial
planets. Coupling a chemistry code and a dust-transport code will be the first
objective of the applicant. Candidates should have a good background in physics and
astrophysics along with computational skills (python, fortran, ..). An experience in
computational chemistry, or protoplanetary disk physics, would be an invaluable
asset to the project. The starting date is negociable but should be (ideally) before July 2022 but negotiable.
The appointment is for two years. The salary includes French social security benefits and funding for travel. For details concerning the position please contact Sébastien
Charnoz (Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser..Additional information may be requested to Alessandro
Morbidelli (Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser.) or Benoît Commerçon (Benoit
Commercon Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser.)
9) Thèse co-financée par le CNES | Inferring tidal and loading effects in the gravity field of Mars and Venus | Date limite 31 mars 2022
Appel à candidat(e)s pour une thèse co-financée par le CNES. Date limite de dépôt des dossiers 31 mars 2022.
Notez que le dossier doit être soumis au CNES avant le 31 mars et qu'il serait donc souhaitable que les candidates et candidats potentiel(le)s se manifestent auprès de Pascal Rosenblatt (Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser.) avant fin février.
Abstract
In absence of global seismic data, gravimetric measurements from the orbit are powerful tools to probe the internal structure and thermal state of planetary bodies. They are widely used to estimate crustal and lithospheric thicknesses as well as the dynamic regime of the mantle (dynamic support of topography, number of plumes…), on all terrestrial planets and even some moons. However, variations of low degree coefficients of the gravity field on different timescales (diurnal, seasonal, decadal) can also be used to constrain the viscoelastic response of the solid body to various forcing. This includes deformations due to diurnal tides, surface load variations due to seasonal cycles, or even long-term relaxation due to rotational state variations. The amplitude of the response is controlled by the mechanical properties of the internal layers. Monitoring the time variations of the main gravity field coefficients on these different timescales is thus of a great help to better constrain the radial structure of the planet (size and state of the core) but also the viscosity of the mantle.
On Mars, the seasonal cycle of condensation and sublimation of the atmospheric CO2at the polar caps is the main contribution, after the solar tides, to the short-term temporal variations of the gravity field. Smaller variations are expected due to the variations of the tidal effects arising from its orbit eccentricity around the Sun. A weaker contribution should also occur through the viscoelastic relaxation of the interior in response to variations of surface loading at much longer timescales responding to the changes of the obliquity of the rotation axis of the planet. These small amplitude variations, not yet quantified, may be retrieved by reprocessing the radio tracking data acquired by the various missions in operation around Mars during the last 25 years.
On Venus, besides tidal fluctuations, gravity changes are also expected from the modulation of the atmosphere-interior coupling, resulting in loading variations at the surface. A small secular variation should also occur due to the viscoelastic relaxation of the planet in response to the spin change. These effects have not been detected with the current gravity field solution but its accuracy should be significantly improved with the future orbiter missions to this planet (EnVision, VERITAS). Combining the measurements acquired by the ESA’s EnVision mission with those acquired by future NASA’s VERITAS and past Magellan data will provide an unique opportunity to quantify the annual to decadal variations of the gravity field. The work proposed in this thesis will be essential to prepare the future observation campaigns and scientific outcomes of the EnVision Radio Science and Gravity Experimentled by LPG with the support of CNES.
The objectives of the thesis are:
To (re-)process the tracking data of the Martian spacecraft (Mars Global Surveyor, Mars Odyssey, Mars Reconnaissance Orbiter, MAVEN of NASA, Trace Gas Orbiter of ESA) in order to refine the time-variable gravity solution of Mars. This tracking data processing will be performed with the GINS orbitography software developed by CNES and used at LPG.
To model the viscoelastic response of Mars using an updated model of internal structure, in order to interpret the results of 1). This model has been developed at LPG and already applied to icy satellites and Venus. It will take into account the tidal and loading effects at different spatial wavelengths and time scales.
To compute the predicted short-term temporal variations of the Venusian gravity field due to the atmosphere/solid body coupling, using the viscoelastic model already used in 2), assuming various internal structure and states that are consistent with Venus rotational evolution.
To quantify the expected amplitude of the secular variations of the Venusian gravity field in the tracking data of the future VERITAS and EnVision missions that should be launched to the planet in 2028 and 2031, respectively. The simulations will use the mission scenarios for the tracking data noise budget and coverage and will be performed with the GINS software.
For more Information, contact Directeur de thèse : Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser.
Profil
Good knowledge in orbital mechanics of artificial satellites, in harmonics analysis, in shell script and fortran. Good knowledge in internal geophysics of the Earth or terrestrial planets.
Speciality of the Master: Space engineering, Earth and planetary interior modeling.
