Faculty Profiles

Marwan Gebrane

Marwan Gebran

Associate Professor of Physics and Astronomy
Department Chair
B 03 Science Hall



I am an observational astrophysicist. My research interests include the chemical composition of stars in open clusters and in the field, synthetic spectra, binary stars, HgMn stars, and model atmospheres.

I got my PhD from Universite de Montpellier II in 2007. My thesis was entitled "Chemical abundances determination in A/F dwarfs members of open clusters. Constraints on the evolutionary models including transport processes."

I joined the Gaia team from December 2008 till September 2010 at the University of Barcelona (UB) where I worked on the calibration of the photometric instrument of the Gaia space telescope. In fall 2010, I joined the Department of Physics and Astronomy at Notre-Dame University-Louaize (NDU), Lebanon.

In fall 2021, I joined the Department of Chemistry and Physics at Saint Mary's College, Notre Dame, Indiana. I am currently the physics program director.


PhD in Astrophysics, University Montpellier II, France
MS in Astrophysics , University Paul Sabatier, Toulouse, France
BS in Physics, University Saint Joseph, Lebanon

Areas of Expertise 

  • Stellar astrophysics
  • Chemical abundances
  • Stellar atmospheres
  • Spectroscopy
  • Deep learning

Research Interests 

  • Chemical composition and fundamental parameters of stars in different clusters and age-anomaly relation in A/F stars
  • Automated spectral classification, application to large survey.
  • Peculiar stars
  • Machine and Deep Learning
  • Chemical tagging

Courses Recently Taught 

  • Heat Vibrations and Waves
  • Mathematical Methods for Physics
  • Thermal and Statistical Physics
  • Discovering Astronomy
  • Introduction to Astronomy and Astrophysics
  • Fundamental of Astrophysics
  • Stellar Astrophysics
  • Variable Phenomena in Astrophysics
  • Electricity and Magnetism
  • Artificial intelligence in Science and everyday life
  • Computational physics

Professional Experience 

  • Physics program director at Saint Mary’s College, Notre Dame, IN, USA. 2022 - present
  • Associate professor at the Department of Chemistry and Physics, Saint Mary’s College, Notre Dame, IN, USA. 2021 - present
  • Chairperson Department of Physics & Astronomy NDU, FNAS–Lebanon. 2018 - 2021
  • Fulbright Visiting Scholar Program, Columbia University, NYC-USA. Spring, 2018
  • Associate Professor NDU, FNAS–Lebanon. 2016 - 2021
  • Assistant Professor NDU, FNAS–Lebanon. 2010 - 2016
  • Postdoctoral Fellow University of Barcelona, Departament, DAM), BCN-Spain. 2008 - 2010

Creative and Scholarly Work 

  • 2022: The Gaia-ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data  products
  • 2022: The Gaia-ESO Public Spectroscopic Survey: Implementation, data products, open cluster survey, science, and legacy
  • 2022: The Gaia-ESO Survey: The analysis of the hot-star spectra
  • 2022: Deep Learning application for stellar parameters determination: I- Constraining the hyperparameters.
  • 2021: The use of Deep Learning in stellar classification
  • 2021: The Gaia spectrophotometric standard stars survey - IV. Results of the absolute photometry campaign
  • 2019: The Chemical Compositions of the Two New HgMn Stars HD 30085 and HD 30963: Comparison to χ Lupi A, ν Cap, and HD 174567
  • 2019: Sliced Inverse Regression: application to fundamental stellar parameters
  • 2019: Pushing Automated Abundance Derivations into the Cool Dwarf Regime: A Test Using Three G and Two K Stars in Praesepe
  • 2018: An empirical recipe for inelastic hydrogen-atom collisions in non-LTE calculations
  • 2018: A and F stars as probes of outer Galactic disc kinematics

Professional Memberships 

International Astronomical Union, IAU
The American Physics Society, APS
The American Astronomical Society, AAS
Sigma-Pi-Sigma Honor Society