The lab regularly hosts colloquia and workshops that focus on particular subjects
which are chosen amongst the different fields and projects of the lab.
These meetings last several days and are intended for professionals only.
Over the last 10 years, the gravitational microlensing community evolved from individual competitive microlensing planet-hunting teams into a worldwide combined network of telescopes performing coordinated observations and sharing data including feedback from nearly real time modelling. Now, the microlensing community is taking advantage of the deployment around the world of wide field imagers and the use of large programs on board Spitzer and dedicated Kepler-2 campaign in 2016. This workshop is a forum to discuss recent work, to exchange ideas and experiences in all areas of gravitational microlensing and its applications, with a special focus on mass measurement techniques using high angular resolution observations and ground-space parallaxes with Spitzer and Kepler-2.
The Institut d'Astrophysique de Paris organizes a workshop to celebrate the scientific achievements of Francois R. Bouchet on the occasion of his 60th anniversary. In the context of these contributions, the conference focuses on the prospects for cosmology over the next decades.
The goal of this workshop is to bring together theoreticians, numericists and observers to discuss recent developments in the study of the secular evolution of self-gravitating systems over cosmic age. Numerous dynamical challenges are now ready to be re-examined, such as the impacts of external disturbances and discreteness noise on orbit distributions over cosmic time. Such studies require intricate theoretical models, complex numerical experiments and a good knowledge of the physical processes involved, as well as close interactions between the experts in these fields.
This conference illustrates the significant contributions of Jean-Paul Zahn, who passed away one year ago, along his career in several fields of stellar physics: tides in stars and planets; seismology and stellar structure, evolution, rotation; convection, magnetism and dynamo; instabilities, turbulence and disks.
This workshop aims at focusing on the physics and astrophysics of gravitational-wave sources for existing and future terrestrial interferometers, pulsar timing arrays, as well as future space-borne missions. Another goal is to explore the synergies of these experiments among themselves and with traditional electromagnetic astrophysics.
This workshop aims at addressing the questions of the nature and location of the PeVatrons, sources of high energy cosmic rays and neutrinos, and the understanding of the main acceleration process at work in these sources.
Some well-known experts in this field of research, at the crossroads between the high energy, astroparticle and astro-plasma communities, are gathered in order to cover the latest theoretical developments in understanding acceleration (including shocks, reconnection, turbulence etc.) as well as the phenomenology of particle acceleration in astrophysical sources.
The level of detail one can attain through the study of individual stars, the interstellar medium,
the birth places of stars, and the properties of dark matter in the Milky Way (MW) and its halo scale
environment is such that astrophysicists can begin to quantitatively constrain many of their ideas about the
formation and evolution of the MW and the Local Group galaxies.
Given how much detail one can obtain about the MW, the availability of the GAIA data releases, and the fact that studying analogs of the MW in the distant Universe is reaching maturity,
it is the time to bring experts together from three often disjoint astrophysical
communities: observers and theoreticians who focus on the MW and nearby galaxies, observers
who study the physical properties of MW progenitors in the early universe, and modelers and
theoretician who study galaxy formation and evolution focusing on the evolution of spiral
galaxies. The goal of this confernce is not to determine whether the MW is a typical galaxy for its mass but to
generalize what is known about the MW within the broader context of galaxy evolution and its underlying physical drivers.
About twenty scientists involved in the LARS project (Lyman Alpha Reference Sample) meet in order to work on and discuss the bulk of data obtained for Lyman alpha emitters. These are galaxies undergoing strong starburst events, in which the Lyman alpha line has been observed in emission in the ultraviolet by the Hubble Space Telescope. These relatively nearby objects are be used to compare with and interpret samples obtained at high redshift. The set of data includes imaging and spectroscopy obtained with the Hubble telescope, as well as data taken with other ground-based telescopes (integral field spectroscopy, infrared imaging, radio HI measurements, X-ray observations of the hot gas etc.).
In its fourth year, the Ramses User Meeting aims at bringing together RAMSES users of all levels to present scientific results, new technical developments and challenges. RAMSES is an open source code to model astrophysical systems, featuring self-gravitating, magnetized, compressible, radiative fluid flow. Based on the Adaptive Mesh Refinement (AMR) technique, it has been widely used for cosmological simulations of the Universe, isolated as well as cosmological re-simulations of individual galaxies, simulations of molecular clouds, star formation, supernovae remnants, accretion disks around black holes and planets.
The physics and chemistry of molecular gas are key to three fundamental questions in astrophysics: the formation of galaxies, stars and planets. Progress in these areas depends critically on our ability to observe the molecular gas in galaxies, especially H2. H2 initiates complex interstellar chemistry by bounding with heavier elements. H2 is a tracer of the low-metallicity molecular material in the outskirts of galaxies, but also a tracer of the energetic processes that shape the structure of the interstellar matter, from galactic scales to the scales of turbulent dissipation. In that sense, H2 is very complementary to CO.
The James Webb Space Telescope (JWST), to be launched in October 2018, will allow us to observe the rotation-vibration lines of H2 with a sensitivity and a spatial resolution 100 times greater than Spitzer and VLT/SINFONI/KMOS. This meeting aims at presenting current work on H2 physics and chemistry in space, and stimulate new work, focusing on models and lab experiments, to prepare observing projects in the very competitive perspective of the JWST observing calls (April 2017 for the Early Release Science and October 2017 for the open time calls).
This is the second event of the series Young Astronomers on Galactic Nuclei (YAGN), which is an annual informal meeting of Ph.D. students and postdocs working on supermassive black holes and active galactic nuclei in general, with the aim of promoting exchanges of ideas and new collaborations amongst young scientists.
Gravity appears to be one of the ingredients of open problems that span an impressive range of length scales and several research fields - theoretical and mathematical physics, cosmology, astrophysics. Characteristic examples are the quantum nature of space-time, vacuum energy and the cosmological constant, dark matter and dark energy, black holes physics. One of the key problems in gravity is the limited amount of experimental guidance. The purpose of this workshop is to bring together leading experimentalists and a handful of theorists and discuss how ongoing and future experiments that can lead to new insights on the gravitational interaction. Experiments at all scales are covered, from tabletop to space missions, and across all fields, from gravitational waves and relativistic astrophysics to cosmology and analogue gravity.
Large-scale galaxy surveys, detailed galaxy simulations, as well as innovative physical modeling has brought important progress on our understanding of groups of galaxies and their effects on galaxies therein. This workshop aims at bringing together a group of experts on galaxy groups, and their environmental effects on galaxies, in order to highlight the new results and seek new research directions.
In the context of the "Séminaires d'Histoire" of the "Observatoire de Paris", a half-day colloquium focusses on various topics of stellar atmospheres to which Jean-Claude Pecker contributed, both from a historical standpoint (1930-1980), and a modern perspective.