Globular Clusters (GCs) are ubiquitous in galaxies through space and time. Thus, these systems are among the fundamental building blocks of galaxies and trace their assembly history. They have always played a crucial role in astrophysics. The properties of GCs exhibit strong galaxy-to-galaxy differences, which result from differences in their evolutionary histories. Thus, to approach a more complete picture of GC formation, they have to be studied in a variety of galaxies with different masses, environments, and formation histories. Understanding how star cluster luminosity functions, physical sizes, and contents vary as a function of the environment in which they were formed will be crucial for our understanding of GCs themselves and to use them as fossil records of previous galaxy merger events.

The first space-based imaging surveys that will cover large fractions of the sky, such as EUCLID and the Roman Space Telescope, will launch in the next few years. These surveys will enable us to identify extragalactic GCs far beyond the distances where it is currently feasible to cover large areas of the sky. Thanks to their depth and spatial resolution, and to the synergies implemented with ground-based surveys, the wide-field space-based surveys are expected to increase the number of known extragalactic GCs dramatically. The combined benefits of a great homogeneity and of morphological information will lead to a large range of applications in GC science. This conference aims at bringing together the extragalactic GC community and experts of each survey, to specifically discuss and explore the future avenues that these exceptional data sets will provide in this area of investigation.

In particular we plan to explore how these surveys will expand the use of Globular Clusters as kinematic tracers of former accretion events as well as tracers of the dark matter content of their parent galaxies. These wide-field imaging surveys that have a high enough spatial resolution to resolve GCs will mark a leap in detection efficiency and thus how well we can use them as tracers. Using GCs as dynamical tracers will highly depend on the synergies of these space based surveys with ground based spectroscopic surveys which will be explored in this session.

A second focus topic will be how the extension of precision photometry to the GCs of more distant galaxies will shed light on cluster formation processes and on the peculiarities of their stellar populations. The surveys will help determine how GC color-color relations and age-metallicity distributions depend on the environment these objects live in. By considering the integrated light signature of multiple stellar populations across the optical and near-IR spectrum, new insights may be gained on issues such as the abundance anti-correlations and UV-upturn in massive elliptical galaxies.

As a third cornerstone, the meeting will provide a platform for theorists to share their predictions for the formation and co-evolution of galaxies and their GC populations. Many of these predictions on Globular Cluster population assembly will be testable for the first time with the upcoming larger datasets.

Goals:

1. How will space-based deep wide-field surveys shape extragalactic GC astronomy?

2. What are the synergies of space based surveys with ground based photometric and spectroscopic surveys to use GCs as large scale dynamical tracers?

3. How will these large scale surveys and their precision photometry help us determine how the stellar populations and abundances of GCs depend on their environment?

4. What models of GC and Galaxy co-evolution are available as counterparts to these observations and what are the new testable parameters?

Programme

Invited speakers

• Patrick Côté
• Ariane Lançon
• Dougal Mackey
• Marta Reina-Campos
• Laura Sales
• Rubén Sánchez-Janssen

Scientific organisers

• Karina Voggel (Co-Chair)
• William Chantereau (Co-Chair)
• Eric Peng
• Annette Ferguson
• Søren Larsen
• Ariane Lançon

Contact

• karina.voggel @ astro.unistra.fr
• wchantereau @ unistra.fr

Updated on Wed Jan 27 18:15:59 CET 2021

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Select a session S1: A holistic view of the Milky Way: linking ages, chemistry and kinematics S2: Exploring the high-redshift Universe with ALMA S3: Galaxy clusters and AGNs: advances in theoretical simulations and observations by next-generation surveys S4: Massive Galaxies: The Build-up of Monsters Through Cosmic History S5: Neutron stars and fast radio bursts: a magnetic connection S6: Planetesimal belts: revealing the push and pull within planetary systems S7: Quasars at the reionization epoch S8: Stars on the pathway to become gravitational-wave sources S9: The Birth, Life, and Death of Black Holes S10: The many faces of black hole accretion S11: The outer reaches of galaxies: structure, kinematics, and accretion history S12: The Renaissance of the Low Surface Brightness Universe S13: The Transient Universe S14: Exoplanets in the 2020s: theory, observations, and instrumentation S15: Gaia: The (TWO) Billion Star Galaxy Census: The Science of EDR3 and the promise of DR3 S16: Massive stars: birth, rotation, and chemical evolution SS1: Apertif: Two years of survey operations SS2: Astronomy for Development SS3: Black holes under the magnifying glass of XRISM and Athena SS4: Data Science in Astronomy SS5: Data-intensive radio astronomy: bringing astrophysics to the exabyte era SS6: Diversity and Inclusion Day SS7: Dynamic Duos--Binary Stars Reveal Circumbinary Planets, Transients, Mergers SS8: Welfare and Mental Health in Astronomy Research SS9: European Forum of Astronomical Communities SS10: Extragalactic Globular Clusters with upcoming wide-field space-based surveys SS11: Extreme astrophysics at extremely high resolution SS12: Gamma-ray bursts as cosmic probes: The next 10 years SS13: JWST, a great observatory nearing liftoff SS14: Legacy and stewardship of astronomical archives towards multi-instrument, multi-wavelength and … SS15: Molecules in starless and pre-stellar cores: tools to understand low- and high-mass star-formation SS16: Probing New Physics with Gravitational Cluster Lenses SS17: Science with WEAVE, the WHT's next-generation spectroscopic survey facility SS18: Shining Light on Quiescent Black Holes with Tidal Disruption Events SS19: Streamers: thinking outside the planet-forming disk SS21: The Gaia revolution in Milky Way modelling SS22: The Great Dimming of Betelgeuse: news from the mass loss of red supergiants SS23: The main sequence of star-forming galaxies SS24: The role of nurture on the Star Formation cycle of satellite galaxies SS25: The route to coalescence of supermassive black hole binaries: a comprehensive view SS26: Towards a Complete Census of Star-Formation in the Early Universe SS27: Under the Gamma-ray sky of Canary Islands SS28: Variation of the stellar Initial Mass Function between and within galaxies SS29: Where are the BH-NS binaries? SS30: Astronomy for Planet Earth: forging a sustainable future SS31: Impact of Satellite Constellations on Astronomical Activities SS32: Machine Learning and Visualisation in Data Intensive Era SS33: Star clusters to the next scale: reading the Local and high-z Universe with new giant eyes SS34: Early Career Astronomers & their supporters LS1: Getting the most out of ESO data: a hands-on session on the ESO Science Archive and data processing tools LS2: Taking infrared interferometry to the next level with GRAVITY+ LS3: Healthy Careers in Astronomy LS4: Massively multiplexed, large-aperture, spectroscopy: Science and synergies in the 2030s LS5: The ESA Space Science Archives