IAU Focus Meeting FM7: 
Radial metallicity gradients in star forming galaxies

August 28 – 29, 2018

Scientific Rationale:

FM7 will be a forum to discuss the recent and future advances in the field of the spatial distribution of metallicity in galaxies, including the Milky Way. Radial metallicity gradients have been successfully used through the recent past to set important constraints on the chemical evolution of galaxies. However, some fundamental key questions, as, for instance, how gradients evolve with time, are still under debate. Current results from large Galactic and extragalactic surveys have brought a wealth of new information on several aspects of gradients of star-forming galaxies, such as, e.g., their shape as function of galaxy properties, their possible bimodality, and their evolution with time. This meeting will focus on metallicity gradients to emphasize the major achievements and requirements both in the observational field and in the new chemo-dynamical evolutionary models. The proposed scientific program includes a variety of probes and observational techniques, both in the Milky Way and in external galaxies, although it will be very focused on the implications of radial metallicity gradients for galaxy formation and evolution.



  • Observations of metallicity gradients in the Milky Way: nebular probes (PNe, HII regions) and    stellar probes (Supergiants, Cepheids, Open Clusters, field stars); The impact of Gaia. 
  • Observations in the Local Universe: the present state-of-the-art and the impact of future instrumentation. 
  • Pushing the envelope: observations at intermediate and high redshifts. 
  • Large spectroscopic surveys in the context of metallicity gradients: results for the on-going surveys (e.g., Gaia-ESO, APOGEE, GALAH, CALIFA, MANGA) and expectations from the forthcoming ones (e.g., WEAVE, 4MOST, MOONS). 
  • Effects of galaxy interactions, and the environment – clusters vs. isolated galaxies – on radial metallicity gradients. 
  • Time evolution of the radial metallicity gradient, and the implications of radial migration. 
  • Methods to measure the metallicity, e.g. strong line metallicity calibrations vs. direct measurement of the electron temperature, and their impact on metallicity gradients. 
  • Measuring the metal content with dust: the relation between dust and metallicity, and its implication in our knowledge of the gas content.




Abstract list for FM7
Poster list for FM7

Tuesday, 28. Aug.

Section I
Observations of metallicity gradients in the Milky Way

room: E2
10:30 - Inno, Laura (Radial metallicity gradients with Galactic stellar probes)
10:50 - García-Rojas, Jorge (Radial metallicity gradients with Galactic nebular tracers)
11:10 - Anders, Friedrich (The evolution of the Milky Way's radial metallicity gradient as seen by APOGEE, CoRoT, and Gaia)
11:25 - Pérez-Montero, Enrique (The radial galactic distribution of the ionizing field of radiation in HII regions using photoionization models)
11:40 - Ho, I-Ting (Go beyond radial metallicity gradient: azimuthal variations of oxygen abundance viewed in 3D)

Section II
Results from large spectroscopic surveys

room: E2
13:30 - Xiang, Maosheng (Metallicity gradients and evolution based on the LAMOST spectroscopic surveys)  
13:50 - Randich, Sofia (The relevance of the Gaia-ESO survey on the Galactic metallicity gradient)
14:10 - Sánchez-Menguiano, Laura (Oxygen abundance profiles with MUSE: radial gradients and widespread deviations)
14:25 - Sanchez-Blazquez, Patricia (Gas and stellar metallicity gradients in face-on disk galaxies)
14:40 - Barrera-Ballesteros, Jorge K. (Exploring the taxomony of metallicity gradients in SDSS-IV MaNGA interacting galaxies)

Section II
Results from large spectroscopic surveys cont.

room: E2
15:30 - Bovy, Jo (The impact of the Apogee database on metallicity gradients)
15:50 - Molla, Mercedes (The relation of the oxygen abundance radial gradient in spiral galaxies with the formation process of their disks)
16:05 - Patrick, Lee (Supergiant stars as Cosmic Abundance Probes)
Section III
Observations of metallicity gradients in galaxies: from the Local Universe to intermediate and high redshifts

room: E2
16:20 - Berg, Danielle (Observations of radial metallicity gradients in nearby galaxies)
16:40 - Flores Duran, Sheila Nathanya (Metallicity gradients in M31, M33, NGC 300, and Milky Way using Argon abundances)


Wednesday, 29. Aug.

Section III
Observations of metallicity gradients in galaxies: from the Local Universe to intermediate and high redshifts cont.
room: E2
10:30 - Belfiore, Francesco (Surveys of moderately redshift galaxies and radial metallicity gradients)
10:50 - Wang, Xin (Precise evolution of metallicity radial gradients at cosmic noon and its constraints on galaxy evolution )
11:05 - Carton, David (Resolving gas-phase metallicity gradients of intermediate redshift galaxies with MUSE)
11:20 - Christensen, Lise (Metallicity gradients in absorption-selected intermediate-redshift galaxies)
11:35 - Curti, Mirko (The Klever Survey: spatially resolved metallicity maps and gradients in high redshift galaxies )

Section IV
Measuring the metal content with gas, dust and molecules

room: E2
13:30 - Bianchi, Simone (The Dustpedia project: comparing the radial distributions of metal content in gas and dust)
13:50 - Kewley, Lisa (Emission-line diagnostics for galaxies)
14:10 - Casasola, Viviana (The dust/gas/metallicity scaling relations in the Local Universe)
14:25 - Colzi, Laura (Nitrogen isotopic ratio across the Galaxy)
14:40 - Zhang, Jiangshui (A systematic study on isotope ratios toward molecular clouds in our Galaxy)

Section V
Chemo-dynamical evolution models, and comparison with the observations

room: E2
15:30 - Minchev, Ivan (Galactic archaeology: understanding the metallicity gradients with chemo-dynamical models)
15:50 - Tissera, Patricia (Galaxy evolution in the context of radial metallicity gradients)
16:10 - Vincenzo, Fiorenzo (Radial elemental abundance gradients in galaxies from cosmological chemodynamical simulations)
16:25 - Fragkoudi, Francesca (What the Milky Way bulge reveals about the initial metallicity gradients in the disc)
16:40 - Athanassoula, Lia (Time evolution of the metallicity gradients)



  • Letizia Stanghellini, USA (chair)
  • Laura Magrini, Italy (chair)
  • Katia Cunha, Brazil (chair)
  • Magda Arnaboldi, Germany
  • Fabio Bresolin, USA
  • Viviana Casasola, Italy
  • Brad Gibson, UK
  • Karen Kwitter, USA
  • Xiaowei Liu, China
  • Melissa Ness, Germany
  • Miriam Pena, Mexico
  • Leonid Pilyugin, Ukraine
  • Sofia Randich, Italy
  • Sebastian Sánchez, Mexico
  • Patricia Sánchez-Blazquez, Chile
  • Jose Vilchez, Spain
  • Gayandhi De Silva, Australia



Letizia Stanghellini 


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