LERMA UMR8112

Laboratoire d’Études du Rayonnement et de la Matière en Astrophysique et Atmosphères



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Annuaire


Numéros de téléphone pour le site de Paris : 01 40 51 XX XX
Numéros de téléphone pour le site de Meudon : 01 45 07 XX XX
Les adresses email sont sous la forme prenom.nom@obspm.fr


Call numbers for Paris : +33 (0)1 40 51 XX XX
Call numbers for Meudon : +33 (0)1 45 07 XX XX
Email addresses are: first_name.last_name@obspm.fr


A|B|C|D|E|F|G|H|I|J|K|L|M|N|O|P|Q|R|S|T|U|V|W|X|Y|Z

Nom PrénomTéléphoneLieuBatiment

A
Abgrall Herve 75 69 Meudon BAT 18 - LAM
Aires Filipe 20 30 Paris BAT A
Allys Erwan Exterieur ENS
Amodeo Stefania Paris BAT A
Arnault Pablo 01 44 27 76 07Exterieur Jussieu
Aubert Dominique Paris
Audibert Anelise 20 41 Paris BAT A
Audon Valerie 20 66 Paris BAT A
B
Ba Yaye-awa 7142 Meudon BAT 18 - LAM
Balança Christian 74 05 Meudon BAT 18 - LAM
Baouche Saoud 01 34 25 70 92Exterieur Cergy-Pontoise
Barbachoux Cecile
Batrung Michele 20 60 Paris Lallemand
Beaudin Gerard 20 10 Paris BAT A
Bellomi Elena Exterieur ENS
Belyaev Andrey Meudon BAT 18 - LAM
Bertin Mathieu 01 44 27 44 74Exterieur Jussieu
Bigot Viviane 20 19 Paris BAT A
Bingan Carine 20 66 Paris BAT A
Binh Pham 21 35 Paris BAT A
Blaess Christophe 75 51 Meudon BAT 18 - LAM
Bolgar Florian 20 61 Paris BAT A
Bonjean Victor Paris BAT A
Boone Frederic
Boulanger Francois Exterieur ENS
Boursier Corinne 01 44 27 44 80Exterieur Jussieu
Bron Emeric
C
Cabrit Sylvie 23 73 Paris BAT A
Caillat Michel 21 45 Paris BAT A
Cambra Remi Paris
Caro Fernando 20 75 Paris BAT A
Caroopen Sylvain 20 79 Paris BAT A
Casoli Fabienne 21 20 Paris BAT A
Castignani Gianluca 20 61 Paris BAT A
Chaabouni Henda 01 34 25 69 83Exterieur Cergy-Pontoise
Chabalier Nicolas Meudon BAT 18 - LAM
Champion Norbert Bat18 : 75 73 - 10m: 75 50Meudon BAT 02 - Grands Communs
Chaves Isadora 20 41 Paris BAT A
Chevrier Murielle 20 07 Paris BAT A
Chilingarian Igor N/A
Ciambur Bogdan 20 08 Paris BAT A
Ciardi Andrea 01 44 27 76 02Exterieur Jussieu
Colombo Salvatore Exterieur Jussieu
Combes Francoise 20 77 Paris BAT A
Commercon Benoit
Congiu Emanuele 01 34 25 70 78Exterieur Cergy-Pontoise
Coulais Alain 20 64 Paris BAT A
D
Dassa-terrier Julien 01 40 51 20 06Paris BAT A
Dasyra Kalliopi
Dauplay Frederic 23 54 Paris BAT A
Dayou Fabrice 74 44 Meudon BAT 18 - LAM
De Kertanguy Amaury 74 52 Meudon BAT 18 - LAM
Debbasch Fabrice 01 44 27 76 12Exterieur Jussieu
Defrance Fabien 22 56 Paris Lallemand
Delahaye Franck 74 46 Meudon BAT 18 - LAM
Delfini Duccio 20 60 Paris Lallemand
Delorme Yan 20 42 Paris Lallemand
Demirturk Tarikakan 20 34 Paris BAT A
Deparis Nicolas
Desa Lionel 01 44 27 76 07Exterieur Jussieu
Desforets Guillaume 23 73 Paris BAT A
Diana Stephan 01 34 25 70 64Exterieur Cergy-Pontoise
Dimauro Paola Paris BAT A
Dimitrijevic Milan 78 26 Meudon BAT 18 - LAM
Dominguez Sanchez Helena Paris
Drouin Mathieu Exterieur Jussieu
Dubernet-tuckey Marie-lise75 70 Meudon BAT 18 - LAM
Dulieu Francois 01 34 25 70 96Exterieur Cergy-Pontoise
Dupuy Rémi Exterieur Jussieu
E
Eames Evan 607 Paris BAT A
Eidelsberg Michele 74 40 Meudon BAT 18 - LAM
El Khchai Woihiba 20 19 Paris BAT A
Elandaloussi Hadj 01 44 27 96 09Exterieur Jussieu
Encrenaz Pierre 20 36 Paris BAT A
Ermida Sofia Paris BAT A
F
Falgarone Edith 01 44 32 33 47Exterieur ENS
Favrichon Samuel 27 00 Paris BAT A
Feautrier Nicole 75 52 Meudon BAT 18 - LAM
Feraud Geraldine Exterieur Jussieu
Feret Alexandre 21 33 Paris Lallemand
Fillion Jean-hugues 01 44 27 96 05Exterieur Jussieu
Fresquet Xavier 01 442 776 05Exterieur Jussieu
Freundlich Jonathan
G
Galligani Victoria Paris BAT A
Galtier Thomas 20 28 Paris BAT A
Gatilova Lina 01 69 63 60 57Exterieur
Gay Gregory 22 56 Paris Lallemand
Gerin Maryvonne 23 48 Paris ENS
Gheudin Maurice 20 27 Paris Lallemand
Gillet Nicolas Exterieur
Girot Laurent Paris
Glass Michèle 01 44 27 43 26Exterieur Jussieu
Godard Benjamin 7451 Meudon BAT 18 - LAM
Guelin Michel Exterieur
Guibal Beatrice 01 44 27 76 06Exterieur Jussieu
Gusdorf Antoine 01 44 32 39 92 Exterieur ENS
Guyot Julien Exterieur Jussieu
H
Hamer Stephen
Hamy Philippe 21 43 Paris BAT A
Heays Alan 74 50 Meudon BAT 18 - LAM
Hennebelle Patrick
Heydari-malayeri Mohammad20 76 Paris BAT A
Huertas Marc 20 75 Paris BAT A
I
Ibgui Laurent 01 44 27 76 03Exterieur Jussieu
J
Janssen Christof 01 44 27 96 72Exterieur Jussieu
Jean-baptiste-bolo Sandrine20 19 Paris BAT A
Jeseck Pascal 01 44 27 44 79Exterieur Jussieu
Jimenez Carlos 20 25 Paris BAT A
Joint Francois 20 60 Paris Lallemand
K
Kaiser Nicholas Exterieur ENS
Kerkeni Boutheina Exterieur
Kilic Lise 20 25 Paris BAT A
Koshelev Dmitry 01 44 27 44 88Exterieur Jussieu
Krieg Jean-michel 21 09 Paris Lallemand
L
Lamarre Jean-michel 20 64 Paris BAT A
Landry Patrice 23 79 Paris BAT A
Languignon David 7118 Meudon BAT 18 - LAM
Launet Barthelemy Paris BAT A
Le Tram Ngoc Paris ENS
Le Bertre Thibaut 20 43 Paris BAT A
Le Petit Franck 75 66 Meudon BAT 18 - LAM
Leach Sydney 75 61 Meudon BAT 18 - LAM
Lebourlot Jacques 74 35 Meudon BAT 18 - LAM
Lee Christoph Paris BAT A
Lehmann Andrew Exterieur ENS
Lequeux James 20 64 Paris BAT A
Lerma Artemix
Lesaffre Pierre 01 44 32 33 49Exterieur ENS
Lestrade Jean-francois 21 37 Paris BAT A
Levrier Francois 01 44 32 39 93Exterieur ENS
Lhuillier Benjamin N/A
Lique Francois Exterieur
Lis Darek 20 53 Paris BAT A
Lopes Dominique 75 57 Meudon BAT 18 - LAM
M
Maestrini Alain 20 37 Paris BAT A
Mancillas Brisa 20 08 Paris BAT A
Mansour Charlotte Exterieur Jussieu
Margalef Berta 20 37 Paris BAT A
Marie Jeanne Patrick 01 44 27 44 86 Exterieur Jussieu
Markov Vladan Paris BAT A
Mathieu Jordane 27 00 Paris BAT A
Mayoute Christiane 01 44 27 96 11 Exterieur Jussieu
Meftah Ali 78 26 Meudon BAT 18 - LAM
Mei Simona 20 15 Paris BAT A
Melchior Anne-laure 20 61 Paris BAT A
Menu Mélissa Exterieur ENS
Michaut Xavier 01 44 27 44 74Exterieur Jussieu
Michel-dansac Leo Exterieur
Mignoni Sabrina 20 28 Paris BAT A
Mohamed Abdi-salam Exterieur Cergy-Pontoise
Moreau Nicolas 79 76 Meudon BAT 18 - LAM
Moudens Audrey 01 34 25 70 99Exterieur Cergy-Pontoise
N
Nguyen Thanh Exterieur Cergy-Pontoise
Nicolas Loic 01 44 27 76 08Exterieur Jussieu
Noirot Gael Paris BAT A
O
Ocvirk Pierre Exterieur
Olivares Valeria 23 58 Paris BAT A
Orkisz Jan Exterieur ENS
Oruba Ludivine 01 44 32 22 38Exterieur ENS
Oueslati Ichraf Exterieur
P
Pagani Laurent 20 13 Paris BAT A
Panis Jean-francois Exterieur Jussieu
Paris Céline 01 44 32 33 53Exterieur ENS
Parroni Carolina Paris BAT A
Pelay Laurent 22 65 Paris Lallemand
Pellet Victor 20 12 Paris BAT A
Penkina Anastasia Exterieur
Perault Michel 01 44 32 33 52Exterieur ENS
Petitdemange Ludovic 01 44 32 25 80Exterieur ENS
Pety Jerome +33 (0)4 76 82 49 87Exterieur
Philippe Laurent 01 44 27 96 04 Exterieur Jussieu
Pinto Cecilia Meudon BAT 18 - LAM
Plasapar Contact 71 42 Meudon BAT 18 - LAM
Polles Fiorella 23 62 Paris BAT A
Prigent Catherine 20 18 Paris BAT A
Putaud Thomas Exterieur Jussieu
Raichoor Anand 21 05 Paris BAT B
Rieu Nguyen-quang
Rodriguez Monica Paris BAT A
Roger Nora 01 44 27 44 81Exterieur Jussieu
Roueff Evelyne 74 35 Meudon BAT 18 - LAM
Rouille Christian 01 44 27 44 87Exterieur Jussieu
Rousselle Olivier Paris BAT A
Sahal-brechot Sylvie 74 42 Meudon BAT 18 - LAM
Salome Quentin
Salomé Philippe 21 03 Paris BAT A
Sanchez Norma 23 03 Paris BAT A
Santos Nilton 74 16 Meudon BAT 18 - LAM
Semelin Benoit 20 59 Paris BAT A
Shimabukuro Hayato Paris BAT A
Signore Monique
Singh Raj Laxmi Exterieur Jussieu
Sow Abdellahi 0134257339 Exterieur Cergy-Pontoise
Spielfiedel Annie 74 53 Meudon BAT 18 - LAM
Stan Adrian 01 44 27 76 08Exterieur Jussieu
Stehle Chantal-jeanne 01 44 27 76 04Exterieur Jussieu
Stephan Gwendoline Meudon BAT 18 - LAM
Tabone Benoît 20 41 Paris BAT A
Tchang-brillet Lydia 75 76 Meudon BAT 18 - LAM
Te Yao 01 44 27 96 07Exterieur Jussieu
Techinfo Lerma 0145077560 Meudon BAT 18 - LAM
Thuon Jeremy 23 46 Paris BAT A
Trebitsch Maxime Exterieur
Treuttel Jeanne 23 02 Paris BAT A
Tuccillo Diego Paris BAT A
Vacelet Thibaut 21 46 Paris BAT B
Valdivia Valeska 01 44 32 Exterieur
Valentin Jérôme Exterieur
Valls-gabaud David 23 80 Paris BAT A
Van Box Som Lucile Exterieur
Vasserot Anne-marie 01 44 27 96 08Exterieur Jussieu
Viallefond Francois 21 02 Paris BAT A
Wang Die 20 25 Paris BAT A
Wang Xiaoni 20 12 Paris BAT A
Wiedner Martina 20 32 Paris BAT A
Wu Ronin 74 50 Meudon BAT 18 - LAM
Wyart Jean-francois 78 26 Meudon BAT 18 - LAM
Yang Fei N/A Exterieur
Zanon Thomas 01 44 27 69 71Exterieur Jussieu
Zeippen Claude 74 43 Meudon BAT 18 - LAM
Zwolf Carlo-maria 74 88 Meudon BAT 18 - LAM

Séminaires à venir

Vendredi 1 juin 2018, 14h00
Salle de l'atelier, Paris
Protoplanetary disks at high angular resolution
Cornelis DULLEMOND
Heidelberg
résumé :
With ALMA and high-contrast optical/IR imaging, protoplanetary disks are revealed to be structured objects. They display rings, spirals, vortices and warps. These structures appear to be extremely well-defined and often have high contrast. This poses the question: what processes cause these conspicuous structures? Are these signs of planet formation? Or do they betray the existence of just-born planets in these disks? In this talk I will discuss these observations and some theoretical models that attempt to explain them. I will show that these structures indicate that dust “pebbles” are being moved around and are trapped in so-called “pressure traps”. I will show that planetary/substellar companions perturb the disk, but that also disk-internal processes can explain some of the ringlike dust traps. I will discuss some ideas to explain the strong warps seen in some of these protoplanetary disks. Finally I will give a preview of the results of an ALMA Large Programme on 20 resolved protoplanetary disks.
 
Lundi 4 juin 2018, 14h00
Salle de l'atelier, Paris
Jour de la semaine exceptionnel
Inefficient jet-induced star formation in Centaurus A: High resolution ALMA observations of the northern filaments
Quentin SALOME
UNAM, Mexico
résumé :
Star formation is one of the key mechanisms driving the evolution of galaxies across cosmic times. The physical properties and the multi-scale dynamics of the molecular gas influence the star formation efficiency. The environment certainly also plays a role in star formation. In particular, recent studies suggest that AGN can regulate the gas accretion and thus slow down star formation. However, evidence of AGN positive feedback is also invoked in a few radio galaxies.

I will present different studies of the northern filaments of Centaurus A at different resolutions. These filaments extend on scales up to 15 kpc, aligned with the radio-jet, and show evidence of recent star formation (Rejkuba et al. 2001). They are the perfect testbed region for positive feedback, here through jet-induced star formation.

At the intersection of the radio jet and one of the HI shells that surround the galaxy (Schiminovich et al. 1994), CO emission in the shell has been detected with SEST (Charmandaris et al. 2000). With APEX, we mapped the CO emission along the FUV filaments that lie at the jet-HI interaction. In particular, we discovered a large amount of molecular gas outside the HI gas (Salomé et al. 2016). However, while the molecular gas reservoir is important, it is very inefficient to form stars compared to star-forming disc galaxies. To understand why star formation is inefficient, we obtained ALMA observations to map the CO emission along the filaments, at a resolution of ~20 pc (Salomé et al. 2017). Such resolution enabled us to separate giant molecular clouds and study their physical properties (mass, size, velocity dispersion).
 
Vendredi 8 juin 2018, 14h00
Salle de l'atelier, Paris
Planet-Hunting with ALMA
Ted BERGIN
University of Michgan
résumé :
The Atacama Large Millimeter Array is revolutionizing our understanding of planet formation. Today we now have detected numerous disks that exhibit symmetric gaps in the emission distribution from sub-mm/mm sized dust particles present in the disk midplane. These gaps have traditionally between posited as being carved by the presence of hidden planets. I will review the techniques and pitfalls that are used to infer the presence of planets within these systems which rely on difficult to constrain assumptions regarding scaling factors such as the dust to gas ratio or local molecular abundance. More directly, I will present a new technique that relies on measuring velocity residuals in the emission of CO isotopologues that deviate from Keplerian rotation with 2 m/s accuracy. In the HD 163296 disk, these residuals directly trace gradients in the gas pressure across the gaps, without need for a priori knowledge of absolute scaling factors. 2D and 3D hydrodyamical models with planets embedded deep within the gaps beautifully replicate the detected structure in the velocity residuals. This provides the strongest evidence to date that unseen Jupiter mass planets are present in these Myr-old systems. I will discuss the bright future of this technique and outline methods that might be used to further confirm the presence of young planets. One possibility that I will explore is the use of disk chemistry. Here, I will present a 3D physical/chemical model that includes two point sources: star and accreting protoplanet. With generic assumptions based on planet formation theory and observations, we find that the localized heating of an accreting protoplanet can alter the chemistry in its near vicinity by, for example, releasing volatiles that otherwise would be frozen on grain surfaces. Thus, if planets are accreting gas these effects will be present and are predicted to be detectable. In all, we are on the cusp of new era of bringing submm-wave astronomy into the realm of planet detection.

 
Vendredi 21 septembre 2018, 14h00
Salle de l'atelier, Paris
Understanding the structure of molecular clouds: Multi-line wide-field imaging of Orion B
Jan ORKISZ
Iram
résumé :
The new generation of wide-bandwidth high-resolution receivers turns
almost any radio observation into a spectral survey. In the case of
wide-field imaging of the interstellar medium, such a wealth of data
provides new diagnostic tools, but also poses new challenges in terms of
data processing and analysis.

The ORION-B project aims at observing 5 square degrees of the Orion B
molecular cloud, or about half of the cloud's surface, over the entire
3mm band. The emission of tens of molecular tracers have been mapped,
including CO isotopologues, HCO+, CN, HNC, N2H+, methanol, SO, CN...
Machine learning techniques have been applied to these maps, in order to
segment the molecular cloud into typical regions based on their
molecular emission, and to idenfify the most meaningful correlations of
different molecular tracers with each other and with physical quantities
such as density or dust temperature.

The spatial coverage, together with the spatial and spectral resolution,
also allow to characterize statistically the kinematics and dynamics of
the gas. The amount of momentum in the compressive and solenoidal
(rotational) modes of turbulence are retrieved, showing that the cloud
is dominated by solenoidal motions, with the compressive modes being
concentrated in two star-forming regions - which is in line with the
overall very low star formation efficiency of the cloud, and highlights
the role of compressive forcing in the star formation process. The
filamentary network of the molecular cloud also proves to have
particluarly low densities, and is very stable against gravitational
collapse and fragmentation, which also points at a young evolutionary
stage of the filaments.
 
Vendredi 5 octobre 2018, 14h00
Salle de l'atelier, Paris
Astrochemistry in star forming regions : new modeling approaches
Emeric BRON
IRAM/LERMA
résumé :
Star-forming regions present rich infrared and millimeter spectra emitted by the gas exposed to the feedback of young stars. This emission is increasingly used to study the star formation cycle in other galaxies, but results from a complex interplay of physical and chemical processes : chemistry in the gas and on grain surfaces, (de)excitation processes of the atoms and molecules, heating and cooling balance,... Its understanding thus requires detailed astrochemical models that include the couplings between these processes. In this talk, I will present several examples where new modeling approaches of specific processes and their couplings proved crucial to solve persistent observational riddles : from the driving role of UV irradiation in the dynamics of photodissociation regions (PDR) to the efficient reformation of molecular hydrogen in these regions.
 
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