IAU Symposium 348:
21st Century Astrometry: crossing the Dark and Habitable frontiers

August 28 – 31, 2018

    Scientific Rationale:

    Astrometry is facing new challenges and crossing new frontiers thanks to increased levels of precision and accuracy. Building on the ESA/Gaia space mission legacy, future space-astrometry mission proposals as Theia, GaiaNIR and Jasmine and relative astrometry measurements from non-astrometric missions and ground-instruments (HST, Euclid, JWST, WFIRST, Gravity, MICADO) will bring the faint Universe at our fingertips.

    The detection of ultra-faint dwarf galaxies and micro-arcsecond measurements of their internal kinematics will be ground-breaking for Dark Matter. The precision of next-generation astrometric infrastructures will probe the very nature of this elusive component of our Universe. In the near future, Gaia will reveal thousands of Jupiter-like exoplanets, and future sub-micro-arcsecond missions will enable complete detection-census and system characterization of Earth-mass planets in our nearest FGK stars habitable-zones, paving the way for exobiology missions. These measurements will also empower studies of Gravity, Inflation, of the matter behavior at Nature most extreme environments and the determination of H0 to unprecedented accuracy.

    At the commemorations of IAU 100th anniversary and just after the Gaia DR2, the first all-sky micro-arcsecond proper-motion and parallax dataset, this timely Symposium will join different communities to foster bridges. Inheriting from Astrometry past, anchored to its promising present, and with a sharp-eye towards its exciting future, it will lay down paths to address together some of the most profound questions of modern Science. What is Dark Matter? Is there life elsewhere in the Universe?


    • Dwarf Galaxies: internal dynamics of Milky Way companions
    • HVS: probing the triaxiality of the Milky Way DM Halo
    • Disc perturbations due to DM clumps
    • Exoplanet detection: from long period Jupiters to Habitable Exo-earths
    • Exoplanet characterization: dynamics, chaos and orbital determination
    • Astrometric signatures of Black Holes: microlensing, shadows, hot-spots, and gravitational effects
    • Equation of state of NS: probing the most extreme states of matter
    • Trigonometric parallaxes for H0 determination: Cepheids, RR-Lyraes and other steps of the distance ladder
    • New astrometric instruments and technologies: space mission concepts and ground based astrometry in the age of the ELTs
    • Modern Statistical Methods for astrophysical information extraction from Astrometric data: signal processing, bayesian methods, optimization strategies



    Abstract list for IAUS348
    Poster list for IAUS348

    Tuesday, 28. Aug.

    Dwarf Galaxies and the Milky Way
    room: E1
    13:30 - Opening Remarks
    13:45 - Watkins, Laura (Astrometric Measurements for Studies of Dwarf Galaxies)
    14:20 - Bovy, Jo (Mapping the Milky Way's Dark Matter with High-Precision Astronometry)
    14:40 - MAMON, Gary (Probing the Nature of Dark Matter with Theia: A Mission Concept for Ultra Precise Differential Astrometry)

    Dwarf Galaxies and the Milky Way
    room: E1
    15:30 - von Hippel, Ted (The Star Formation History of the Galaxy fromm GAIA Astrometry of White Dwarfs)
    15:45 - Pawlowski, Marcel (Phase-Space Correlations Amonng Satellites in the Local Group)
    16:00 - Hillenbrand, Lynne (The GAIA Revolution in Pre-Main Sequence Stars and Star Clusters)
    16:20 - van Langevelde, Huib (Maser Stars Tracing the Milky Way)
    16:40 - Hobbs, David (GAIA NIR - Progress Towards a Future All-Sky Astrometry Mission)


    Wednesday, 29. Aug.

    Plenary Session
    Lecture Hall A
    08:30 - Brown, Anthony (The GAIA Mission and the GAIA Mission Extension)
    09:15 - Bland-Hawthorn, Joss (Near-Field Cosmology and Astrometry)

    Gravitational Effects
    room: E1
    13:30 - Wyrzykowski, Lukasz (Probing the Galactic Population of Black Holes with OGLE and GAIA)
    14:00 - Ducourant, Christine (GRAL: Search for Gravitational Lenses in GAIA DR2)
    14:15 - Andrews, Jeff (Astrophysics with GAIA Wide Binaries)
    14:30 - Chanamé, Julio (Very Wide Stellar Binaries as Probes of Gravity)
    14:45 - Busonero, Deborah (The Astrometric Gravitation Probe Mission Concept)

    Compact Objects
    room: E1
    15:30 - Micaela Oertel (The Equation of State of Compact Objects and the Importance of Astrometric Measurements)
    16:00 - Sahu, Kailash (Detectiong Isolated, Stellar-Mass Black Holes Through Astrometric Microlensing)
    16:15 - Mickaelian, Areg (Discovery of New White Dwarfs Using GAIA Accurate Astrometry)
    16:30 - Starovoit, Elena (About Planets Around the Pulsars B0329+54 and B0525+21)
    16:45 - Gouda, Naoteru (Small-JASMINE Mission)


    Thursday, 30. Aug.

    The Distance Scale of the Universe
    room: E2
    08:30 - Casertano, Stefano (Astrometric Measurements for the Determination of H0)
    09:00 - Ripepi, Vincenzo (Classical Cepheids Near-Infrared Period-Luminosity Relations Based on Vista Magellanic Cloud (VMC) Survey Data and GAIA Parallaxes)
    09:15 - Muraveva, Tatiana (A New Calibration of the Cosmic Distance Ladder Based on GAIA Parallaxes of RR Lyrae Stars)
    09:30 - Anderson, Richard I. (Accurate Parallaxes of Classical Cepheids: Opportunities and Challenges for the Distance Scale)
    09:45 - Marconi, Marcella (The Theoretical Scenario To Interpret GAIA Results for Cepheids and RR Lyrae)

    Extrasolar Planetary Systems
    room: E2
    10:30 - Correia, Alexandre (Dynamics of Multi-Planet Systems and the Importance of Astrometric Measurements)
    11:10 - Barbato, Domenico (Revised Estimates of the Frequency of Earth-Like Planets in the Kepler Field)
    11:30 - Ranalli, Piero (Astrometric Studies of Exoplanets with GAIA and GAIA NIR)

    Extrasolar Planetary Systems
    room: E2
    13:30 - Bennett, David (Exoplanet Astrometry Methods for WFIRST)
    14:00 - Giacobbe, Paolo (Detection of Giant Planets Combining Astrometry and Radial Velocities: The GAIA Potential)
    14:20 - Wandel, Amri (Biosognature Detection and Statistics of Nearby Bio-Habitable Planets)


    Friday, 31. Aug.

    At the Halo: Hypervelocity Stars, Dwarfs and Globular Clusters
    room: E2
    08:30 - Rossi, Elena Maria (Hypervelocity Stars as Powerful Dynamical Tracers of Dark Matter)
    09:00 - Huang, Yang (A Systematic Search for Hypervelocity Stars from the LAMOST Spectroscopic Survey)
    09:15 - Fritz, Tobias (Using Proper Motions to Constrain the Origin of Galaxies)
    09:30 - Richer, Harvey (New Astrometric Directions in Globular Star Cluster Research)
    09:45 - Sakai, Nobuyuki (Ground-Based Astrometric Project VERA: Overview, Science Highlights and Synergy with GAIA)

    Modern Statistics and Informatics for Astrometry
    room: E2
    13:30 - de Souza, Rafael (A Review of Modern Statistical and Machine Learning Methodologies Applied to Astrometric Data)
    14:00 - Zucker, Shay (A Novel Approach to Detect Periodicity in Two-Dimensional Astrometry)
    14:20 - Enßlin, Torsten (Galactic Tomography via Information Field Theory)
    14:40 - Ivantsov, Anatoliy (On the Astrometric Bias for Objects with Overlapping Image Profiles)

    Modern Statistics and Informatics for Astrometry
    room: E2
    15:30 - Fukushima, Toshio (Numerical Integrationof Gravitational Field for General Three-Dimensional Objects and its Application to Gravitational Study of Grand Design Spiral Arm Structure)
    15:45 - Abbas, Ummi (Differential Astrometry with GAIA Simulated Observations)
    16:00 - Zacharias, Norbert (The USNO Robotic Astrometric Telescope (URAT) Program)
    16:15 - Riva, Alberto (LEGOLAS: The Evolution)
    16:30 - Mora, Alcione (The GAIA Archive. Status and Challenges for Data Release 3+)
    16:45 - Closing Remarks



    • Alain Leger, CNRS/IAS, France (co-chair)
    • Alessandro Sozzetti, INAF, Italy (co-chair)
    • Alberto Krone-Martins, Universidade de Lisboa, Portugal (co-chair)
    • Anne Lemaître, Université de Namur, Belgium
    • Barbara McArthur, University of Texas Austin, USA
    • Catherine Turon, Observatoire de Paris Meudon, France
    • Celine Boehm, Durham University, UK (co-chair)
    • David Spergel, Simons Center for Comp. Astrophysics & Princeton University, USA
    • François Mignard, Observatoire de la Côte d'Azur, France
    • Jill Tarter, SETI Institute, USA
    • John Tomsick, University of California, Berkeley, USA
    • Mariateresa Crosta, INAF Osservatorio Astrofisico di Torino, Italy
    • Norio Narita, National Astronomical Observatory of Japan, Japan
    • Torsten Ensslin, Max-Planck-Institut für Astrophysik, Germany
    • Yanxia Zhang, NAO Chinese Academy of Sciences, China



    Alberto Krone Martins 


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