Frédéric GALLIANO

Astrophysicist - CNRS Researcher

Affiliation:
CEA, CNRS, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité
Institute:
Astrophysique Instrumentation Modélisation (AIM) & Départment d'AstroPhysique (DAp)
Laboratory:
Laboratoire de Formation des Étoiles et du Milieu Interstellaire (LFEMI)
Group:
Nearby Universe Agents of Galaxy Evolution Studies (NUAGES)

1 RESEARCH ACTIVITY

1.1 Scientific Interests

My research activity revolves around the InterStellar Medium (ISM), which is the complex intertwining of phases, filling the volume of galaxies between the stars. The ISM is constituted of gas and small solid particles. Stars are born out of the graviational collapse of interstellar matter. The ISM is thus the key to understanding galaxy evolution.

I focus my research on cosmic nanoparticles, also vulgarly called dust. My main projects attempt at constraining the grain properties, in various environments (essentially nearby galaxies). Putting in perspective grain properties observed in different physical conditions provides constraints on dust evolution. Indeed, dust constantly evolves, cycling through the different phases of the ISM (cf. Fig. 1).

dust_evolution_Galliano.png
Figure 1: Schematic representation of the lifecycle of interstellar dust. AGB: Asymptotic Giant Branch; SN: SuperNova; HIM: Hot Ionized Medium; WIM: Warm Ionized Medium; WNM: Warm Neutral Medium; CNM: Cold Neutral Medium.

More generally, I am involved in several aspects of ISMism: studies of photo-ionization and photo-dissociation regions, characterization of the dark gas, and scrutinizing the impact of massive star formation on the surrounding ISM.

1.1.1 Methodological Approach

demo_SED_Galliano.png
Figure 2: Decomposition of an infrared spectral energy distribution. The main space telescopes which contributed to unveil dust properties are indicated in the bottom panel. ISRF: InterStellar Radiation Field.

I usually approach the study of grain properties from the infrared-to-submillimeter Spectral Energy Distribution (SED) point of view (Fig. 2). The complex shape of the SED contains information about the composition, size and excitation of the grains. I have developed my own hierarchical Bayesian dust SED fitting model (HerBIE; Galliano, 2018). Such a code allows an optimal inference of the physical parameters, rigorously accounting for the different sources of uncertainty.

1.1.2 Participation to Large International Collaborations

SAGE/HERITAGE:
.
SAG2:
.
DustPedia:
.
SPICA:
.

1.2 Positions

2008-present:
chargé de recherche (CNRS) at the Département d'Astrophysique, CEA/Saclay, France
2007-2008:
postdoctoral researcher at the University of Maryland, College Park, USA
2004-2007:
postdoctoral researcher (NRC/NPP fellow) at the NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
2000-2004:
PhD thesis (CFR fellow) at the Service d'Astrophysique, CEA/Saclay, France

1.3 Publications, Oral Communications & Softwares

1.3.1 Publications in Scientific Journals

Exhaustive publication list:
ORCID.
Most notable papers
by inverse chronological order:
  1. The Interstellar Dust Properties of Nearby Galaxies, F. Galliano, M. Galametz & A. P. Jones, 2018, Annual Review of Astronomy and Astrophysics, volume 56, pages 673-713 (open access PDF).
  2. A dust spectral energy distribution model with hierarchical Bayesian inference - I. Formalism and benchmarking, F. Galliano, 2018, Monthly Notices of the Royal Astronomical Society, volume 476, pages 1445-1469 (open access PDF).
  3. Non-standard grain properties, dark gas reservoir, and extended submillimeter excess, probed by Herschel in the Large Magellanic Cloud, F. Galliano, S. Hony, J.-P. Bernard, et al., 2011, Astronomy and Astrophysics, volume 536, article A88, 32 pages (open access PDF).
  4. Variations of the mid-IR fromatic features inside and among Galaxies, F. Galliano, S. C. Madden, A. G. G. M. Tielens, et al., 2008, The Astrophysical Journal, volume 679, pages 310-345 (open access PDF).
  5. Stellar Evolutionary Effects on the Abundances of Polycyclic Aromatic Hydrocarbons and Supernova-Condensed Dust in Galaxies, F. Galliano, E. Dwek & P. Chanial, 2008, The Astrophysical Journal, volume 672, pages 214-243 (open acess PDF).
  6. ISM properties in low-metallicity environments. III. The spectral energy distributions of II Zw 40, He 2-10 and NGC 1140, F. Galliano, S. C. Madden, A.P. Jones, et al., 2005, Astronomy and Astrophysics, volume 434, pages 867-885 (open access PDF).
  7. ISM properties in low-metallicity environments. II. The dust spectral energy distribution of NGC 1569, F. Galliano, S. C. Madden, A. P. Jones, et al., 2003, Astronomy and Astrophysics, volume 407, pages 159-176 (open access PDF).

1.3.2 Recent Talks

1.3.3 Outreach

1.3.4 Select Research Notes

Interstellar dust grain properties:
computation and implementation in SwING:
Photometric filters:
color corrections and calibration uncertainties:
Robust estimators
of the moments of a distribution:
Displaying uncertainties
in correlation plots:

1.3.5 Softwares

Gitlab page:
https://gitlab.com/fredericgalliano.
SwING
(SoftWare for Investigating Nebulae and Galaxies).
Small utilities
in Python:
  1. M-estimators
  2. edit_bbl;
  3. diceware_fr.

2 ADMINISTRATIVE RESPONSABILITIES

2.1 The Scientific Council of PCMI

PCMI
is a national program of the Institut National des Sciences de l'Univers (INSU) within CNRS. It stands for Physique et Chimie du Milieu Interstellaire. It is aimed at bringing together the french researchers working on different aspects of the ISM: observations, simulations and laboratory experiments. Each year, it distributes operating grants. It organizes a biennial colloquium.
Website:
http://www.pcmi.cnrs.fr/.

2.2 The DAp Seminar Committee

2.2.1 For Speakers

Program:
official institute program, interactive working schedule.
Instructions:
invited speaker survival guide (HTML or PDF).
Bank account form:
PDF to be filled by hand or editable PDF.

2.2.2 For Organizers

Organization notes:
HTML or PDF.
Checklist:
PDF.

2.3 An International School for Astronomers

Subject:
the interstellar medium of galaxies, from the epoch of reionization to the Milky Way.
Date:
July 19 to 23, 2021.
Location:
observatoire océanographique de Banyuls-sur-Mer, France.
Website:
https://ismgalaxies2021.sciencesconf.org/.

3 MISCELLANEOUS

3.1 Various Computer Related Cheat Sheets (in french)

3.1.1 Text Editors

Vi:
HTML or PDF
Emacs:
HTML or PDF.
Elisp:
HTML or PDF.

3.1.2 Command line utilities

Bash:
HTML or PDF.
Awk:
HTML or PDF.

3.1.3 Other

Ubuntu:
HTML or PDF.
Google search:
HTML or PDF.

3.2 Minimalist Computer Environment

3.3 Systematic Jazz Guitar (in french)

3.3.1 My fake book

3.3.2 Scales, chords, etc.

Last update: 31 janv. 2020