Les nouvelles du 23 avril 2023:
1) Ecole biennale du PNP : Small bodies of the Solar System and their link with extraterrestrial samples | 4-9 Février 2024 | Les Houches, France
2) Réunion Pôle de Données et Service "Surface Planétaire » | 17 Mai 2023 | On line
3) IPPW 2023 | August 26th - September 1st | Marseille
4) PhD position on Interplay of haze and clouds in Titan’s atmosphere | Université de Reims Champagne Ardenne (GSMA)5) Poste d’Enseignant-Chercheur (25%/75%) contractuel en Planétologie | Université de Nantes | DL 29 Mai 2023
6) Annonce de post-doc sur la ligne de lumière DESIRS
7) Thèse, HDR, séminaires
a) Séminaire Deep learning-based focal-plane wavefront sensing: principle, simulations, and in-lab tests | Maxime Quesnel (Université de Liège) | Thursday 27 April, 4PM
b) Séminaire The Mars Soundscape and beyond | Baptiste Chide (LANL) | Jeudi 4 mai, 11h00
Bien cordialement,
Thierry
La liste de diffusion du PNP a pour vocation la communication auprès de tous les chercheurs en planétologie et exoplanétologie en France.
Pour s’inscrire ou se désinscrire, c’est ici : https://listes.services.cnrs.fr/wws/info/pnp_news.
N’hésitez pas à faire suivre cette information auprès des chercheurs/doctorantes/post-doctorants de votre laboratoire.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1) Ecole biennale du PNP : Small bodies of the Solar System and their link with extraterrestrial samples | 4-9 Février 2024 | Les Houches, France
https://leshouches2024.sciencesconf.org/
Le PNP est heureux de vous annoncer sa prochaine école thématique à l'École des Houches sur Small bodies of the Solar System and their link with extraterrestrial samples. Venez nombreux.
Objectives
This Winter School aims to better understand the bridge between solar system small bodies and extraterrestrial samples. Lectures will focus on solar system and small bodies formation and evolution, cosmochemistry, timescales, sample return analysis, and perspectives for this research field. Lectures and discussions will be held in English.
Please have a look at the Program section for more details.
The school is opened to permanent staffs, postdocs, and PhD students.
Date and location
4th to 9th of February 2024
Ecole de Physique des Houches, France
https://www.houches-school-physics.com
Registration (starting 17th April 2023)
Please register in the Registration section. The number of participants is limited to 70 persons. We aim for about 40 permanent staffs (including 25 speakers and SOC members) and 30 postdocs and/or PhD students. If the number of participants exceeds the capacity, we will select the participants to have a proper thematic, geographic, and gender balance.
Participants are expected to attend the full week (5 days); partial attendance is not recommended.
School fees
The price amounts to 540 € (VAT included) per person for the full week. It includes full board (excluding drinks) from Sunday dinner to Friday lunch, and coffee breaks.
The registation will have to be paid via the website AzurColloque, once the participants list is defined (details will come later).
We are currently looking for fundings to support the participations of some PhD students and postdocs.
Sponsors
CNRS / INSU : Programme National de Planétologie (PNP)
CNES : Centre National d'Etudes Spatiales
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2) Réunion Pôle de Données et Service "Surface Planétaire » | 17 Mai 2023 | On line
La prochaine réunion du pôle aura lieu le mercredi 17 Mai à 9h30 - 12h00 en visio.
Au programme :
- 30 min de présentation des actualités du pôle (Phase A, état des projets...)
- 30 min de présentation VESPA par Stéphane Erard (OBSPM) + 15 min de questions/discussions
- 30 min de présentation SSHADE par Bernard Schmitt (IPAG) + 15 min de questions/discussions
Sujet : PDSSP - SHADE-VESPA
Heure : 17 mai 2023 09:30 AM Paris
Participer à la réunion Zoom
https://cnrs.zoom.us/j/96885355334?pwd=NkpudzFnU1lQcU9jUHpscGRkZ0hHUT09
ID de réunion : 968 8535 5334
Code secret : 3L00bg
En espérant vous y voir nombreux !
Jean-Christophe Malapert, Frédéric Schmidt
https://github.com/pdssp
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3) IPPW 2023 | August 26th - September 1st | Marseille
IPPW Community,
We are pleased to announce that the IPPW-2023 Abstract Portal is now live. Oral talks and Poster Abstracts must be submitted through the IPPW Abstract Submission Portal, which you can access via the IPPW Abstract Website. Abstracts will be accepted beginning today, April 7th, with a deadline of May 14th. Please use the template available here(Latex version) or here (Microsoft Word version), session descriptions are available at https://ippw2023.org/session-descriptions/ and we invite both scientific and technical presentations. Each submission allows for only one abstract (and scholarship application) submission. Authors wishing to submit multiple abstracts will have to create multiple accounts. Please do not submit duplicates of the same abstract.
Sponsorship pledges are still being accepted by the Local Organizing Committee (LOC). Please consider whether your organization can provide sponsorship. The greater the level of sponsorship for IPPW-2023, the more benefits the LOC can offer delegates (for instance, competitive registration fees and assistance for students). Once all sponsorship pledges are finalized, registration fees will be reviewed by the International Organizing Committee and published on the website, ippw2023.org.
If you have any questions about the event, please email the LOC at Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser. or the POC at Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser..
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4) PhD position on Interplay of haze and clouds in Titan’s atmosphere | Université de Reims Champagne Ardenne (GSMA)
Titan, the largest of Saturn’s satellites, is unique among the moons of our solar system because it possesses a thick atmosphere (surface pressure of ~1.5 bar). Titan’s atmosphere is a rich organic laboratory leading to the formation of complex molecules, hazes and clouds. The Cassini-Huygens mission (2004-2017) explored Titan’s atmosphere and revealed its complexity as well as its dynamical evolution over the passing of its seasons. Hazes formed in the upper atmosphere (~1000 km) from the complex N2 -CH4 photochemistry, aggregate to fractal-type structures on their way to the surface. Hazes have a strong impact on the radiation field in the atmosphere, while they partake in the formation of clouds in the lower stratosphere (~150 km) due to the condensation of the gaseous photochemical products. Cassini observations reveal that the cloud composition can vary drastically depending on latitude and season, due to local changes in temperature and condensates. Moreover, heterogeneous processes on the surface of hazes and clouds are poorly understood, while the role of cosmic rays in cloud formation requires further attention. The goal of this thesis is to improve our understanding of haze and cloud coupling at different regions of Titan’s atmosphere, by combining detailed models of photochemistry/microphysics with input from laboratory experiments and constraints from Cassini observations. The thesis is funded in the framework of the ANR project TITARAD and will be conducted at the Groupe de Spectrométrie Moléculaire et Atmosphérique of the Université de Reims Champagne Ardenne in France, under the supervision of Panayotis Lavvas.
We seek a highly motivated candidate with an MSc degree, having a strong background in physical sciences and numerical simulations. Background in astronomy/astrophysics is welcomed. Candidates are encouraged to apply by the end of April 2023, but later applications will be reviewed until the position is filled. The start date of the thesis is flexible and can be postponed until October 2023.
For further details, contact Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser.. Candidates should provide a CV and a cover letter.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5) Poste d’Enseignant-Chercheur (25%/75%) contractuel en Planétologie | Université de Nantes | DL 29 Mai 2023
Dans le cadre de l’ERC PROMISES (Presence and Role of Organic Matter in Icy Satellites and ExtraSolar planets), le laboratoire de Planétologie et Géosciences (LPG) de Nantes recrute un Enseignant-Chercheur contractuel. L’enseignement (TD et TP) de 96 heures par an sera effectué dans les modules de géophysique, de sciences de l’univers, et de géologie dans le cursus de Licence en Sciences de la Vie et de la Terre de Nantes Université. Au niveau recherche, la personne recrutée intégrera l’équipe de recherche PROMISES. Cette équipe travaille sur le rôle et les transformations des molécules organiques dans l’évolution thermochimique des satellites de glace des planètes géantes et des exoplanètes riches en eau (water worlds). La recherche pourra porter sur des aspects expérimentaux (expériences HP en cellules à enclumes et interprétations des spectres Raman, infrarouges, spectrométrie de masse, …) ou numériques (transferts thermiques et chimiques dans des milieux diphasiques).
Le poste est pour 1 an renouvelable 2 fois au maximum. La personne recrutée devra avoir des connaissances en géophysique interne et/ou en physique appliquée aux sciences de la Terre. Des compétences sur l’aspect expérimental ou sur l’aspect numérique du projet PROMISES sont nécessaires. Autonomie et aptitude pour le travail en équipe sont des qualités nécessaires. La maitrise du Français est demandée pour l’enseignement en L1.
Le dossier, composé d’une lettre de motivation, d’un CV détaillé, de l’attestation ou copie du dernier diplôme obtenu, et le cas échéant, de tout autre document attestant de votre compétence à exercer ce poste, devra être retourné en un seul fichier pdf à : Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser. avec en objet du message ‘candidature contractuel LRU’. La date limite de candidature est le 29 Mai 2023. Le poste démarre le 1 Septembre 2023.
Contacts: Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser. & Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6) Annonce de post-doc sur la ligne de lumière DESIRS
A postdoctoral fellowship funded by the Agence Nationale de la Recherche (ANR) under the ZEPHIRS project is available for one year, renewable once upon mutual agreement, starting from October 2023 at Synchrotron SOLEIL (located in Saint Aubin, 25 km southwest of Paris).
The ZEPHIRS project consortium (ISMO, SOLEIL and ISM) aims at combining synchrotron- and laser-based VUV photoionization to spectroscopically characterise, detect and quantify—in real time and in-situ—reactive intermediates in complex gas-phase chemical reactions using photoelectron spectroscopy as a structural fingerprint.
The candidate will be working at the DESIRS VUV beamline of SOLEIL, and will be in charge of three main tasks:
- strong implication in the commissioning of an upgraded double imaging photoelectron photoion coincidence (i2PEPICO) spectrometer and in charge of improvements to the existing flow-tube reactor;
- internal research related to the photoelectron spectroscopy for the characterisation and identification of species of interest in astrochemical and combustion media, such as small hydrocarbon and polyoxygenated radicals, or the study of molecule–radical reactions involving polycyclic aromatic hydrocarbons;
- participation in collaborative research dealing with chemical reactions in the fields of combustion and catalysis.
The candidate must hold a PhD in experimental Chemistry, Physical Chemistry or closely related field for no more than 4 years. Knowledge of French is not mandatory, but a fluent level of spoken and written English is necessary. The candidate is expected to work at the interface of chemistry (combustion, astrochemistry, catalysis) and physics (photoionization dynamics) and disseminate the results through scientific publications and conferences. Therefore, a solid background in either gas phase molecular dynamics/spectroscopy or gas phase chemical reactivity / combustion processes is required. Hands-on experience with mass spectrometry, photoelectron spectroscopy or particle coincidence detection will be positively evaluated. Programming abilities and familiarity with quantum chemistry computer programs will also be considered.
Applications should be sent by email to Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser. before the 31st of May 2023 providing a cover/motivation letter, CV and list of publications and contact details of at least two referees. Selected candidates will be interviewed online in June 2023.
Information on the team and research activities can be found in the DESIRS website.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
7) Thèse, HDR, séminaires
a) Séminaire Deep learning-based focal-plane wavefront sensing: principle, simulations, and in-lab tests | Maxime Quesnel (Université de Liège) | Thursday 27 April, 4PM
On Thursday 27 April, 4PM , we will host Maxime Quesnel (Université de Liège) for a seminar untitled :
Deep learning-based focal-plane wavefront sensing: principle, simulations, and in-lab tests
Abstract: High-contrast imaging instruments are today primarily limited by non-common path aberrations appearing between the scientific and wavefront sensing arms. These aberrations can produce quasi-static speckles in science images that are difficult to distinguish from exoplanet signatures. With the help of recent advances in deep learning, we have implemented convolutional neural networks (CNN) to estimate pupil-plane phase aberrations from point spread functions (PSF). In this talk, I will show results with simulations obtained behind a vortex coronagraph, exploiting its properties to provide an alternative type of phase diversity with a 100% science duty cycle. I will also introduce an autoencoder-based method, that uses a deep CNN as the encoder and a differentiable simulator of the instrument as the decoder. This enforces the latent space to represent phase aberrations, and because the approach is unsupervised, it is not necessary to know the true aberrations to train the models. This is particularly promising for on-sky applications, and results on laboratory data using the Subaru/SCExAO instrument are first presented.
We will meet in the meeting room on the first floor of building 16 or on zoom.
Best wishes,
Johan Mazoyer
LESIA - HRAA is inviting you to a scheduled Zoom meeting.
Topic: Seminaire HRAA: Maxime Quesnel
Time: Apr 27, 2023 03:30 PM Paris
Join Zoom Meeting
https://us02web.zoom.us/j/88287356876?pwd=RjhHQzEyUkJXY2tuSDNranVWUytqdz09
Meeting ID: 882 8735 6876
Passcode: 108790
b) Séminaire The Mars Soundscape and beyond | Baptiste Chide (LANL) | Jeudi 4 mai, 11h
https://us02web.zoom.us/j/81542249970?pwd=anJqbG9XWTRBaFFrVDVaUGQrck50UT09
On February 18, 2021, NASA’s Perseverance rover landed in Jezero Crater carrying the two first microphones operating on the surface of Mars: the Supercam microphone, positioned on top of the rotating rover’s mast and the EDL microphone fixed on the body of the rover. Working flawlessly since then, they provide the first characterization of Mars’ acoustic environment in the audible range and beyond, from 20 Hz to 50 kHz. Detected sounds originate from three main sources: the atmosphere (turbulence, wind), the shock-waves generated by the Supercam laser ablating rocks, and mission-induced artificial sounds such as the signal generated by the high-speed rotating blades of the Ingenuity helicopter.
After one Martian year, the Perseverance playlist features more than 12 hours of Martian sounds. In addition to provide an unprecedented short timescale characterization of the wind, temperature fluctuations, and the turbulence dissipative regime, this dataset highlights the unique sound propagation properties of the low-pressure CO2-dominated Mars atmosphere: acoustic impedance varying with the season, large intrinsic attenuation of the high frequencies, and the dispersion of the sound speed in the audible range. This presentation will review these results to date and extend them to the exploration of the acoustic environment in our Solar system.
