Ícaro Meidem

Astronomer & Astrophysicist

Itajubá, BR.

About

Highly skilled Astronomer and Astrophysicist with a strong focus on exoplanet detection, characterization, and atmospheric analysis, leveraging advanced machine learning and differential photometry techniques. Pioneered software development for stellar parameter determination and atmospheric characterization, contributing significantly to observational astronomy and educational outreach. Expert in analyzing complex astronomical data to drive new discoveries and enhance understanding of exoplanetary systems.

Work

Observatorio Nacional

|

Researcher (Ph.D. Candidate)

Rio de Janeiro, RJ, Brazil

→

Summary

Leads cutting-edge research on characterizing exoplanet atmospheres around high-metallicity host stars, utilizing advanced spectroscopic and photometric techniques.

Highlights

Directing advanced research on exoplanet atmospheres around high-metallicity stars ([Fe/H] > +0.15), employing transmission spectroscopy and multiband photometry.

Developing and integrating limb darkening models from the MPS-ATLAS spectral library to enhance atmospheric characterization precision.

Expanding research methodology to include FGK-hosted sub-Neptunes and super-Earths, strategically preparing for the PLATO mission's target sample.

Observatorio Nacional

|

Researcher (M.Sc. Candidate)

Rio de Janeiro, RJ, Brazil

→

Summary

Developed and implemented a machine learning pipeline for precise stellar parameter determination, utilizing extensive photometric survey data to identify new exoplanets.

Highlights

Engineered a machine learning pipeline using Random Forest and XGBoost algorithms, achieving improved accuracy in determining stellar parameters (Teff, log g, [Fe/H]).

Analyzed vast photometric data from J-PLUS, S-PLUS, and upcoming J-PAS surveys, significantly enhancing exoplanet host star characterization.

Enabled more precise light curve analysis and facilitated the identification of new exoplanets, brown dwarfs, and candidate objects, expanding the scope of astronomical discovery.

Universidade Federal de Itajubá

|

Research Assistant

Itajubá, MG, Brazil

→

Summary

Designed and implemented an automated experimental activity focused on exoplanet transits, successfully engaging students in physics and astronomy concepts.

Highlights

Developed an automated experimental activity focused on exoplanet transits in collaboration with Laboratório Nacional de Astrofísica, enhancing student engagement in physics and astronomy.

Integrated hands-on experimentation into the Institutional Voluntary Scientific Initiation Program (PIVIC) and Tutored Teaching Plan (PET), successfully bridging research and education.

Designed and implemented a learning sequence that effectively communicated complex exoplanet concepts to students.

Universidade Federal de Itajubá

|

Research Assistant

Itajubá, MG, Brazil

→

Summary

Characterized atmospheres of Hot Jupiter exoplanets using differential photometry, contributing to a deeper understanding of atmospheric composition.

Highlights

Characterized atmospheres of Hot Jupiter exoplanets using the planetary transit technique with narrow filters (H-beta, H-alpha, 4056 Å, Y filter).

Conducted observational studies at Pico dos Dias Observatory (OPD/LNA), collecting critical data for atmospheric analysis.

Improved understanding of atmospheric composition and formation environments of Hot Jupiter systems through detailed photometric research.

Education

Observatorio Nacional

Rio de Janeiro, RJ, Brazil
→
Ph.D Astronomy

Courses

Thesis: Characterization of Exoplanet Atmospheres around High-Metallicity Stars, extended to FGK-hosted sub-Neptunes in the PLATO era (working title).

Observatorio Nacional

Rio de Janeiro, RJ, Brazil
→
MSc Astronomy

Courses

Thesis: Characterization of Exoplanet Host-Stars using Machine Learning Techniques on J-PLUS and S-PLUS Survey Data.

Universidade Federal de Itajubá

Itajubá, MG, Brazil
→
B.Sc Physics

Courses

Thesis: Developing a Teaching and Learning Sequence with Design-Based Research about Exoplanets.

Awards

Best Work Award at the V Scientific Initiation Symposium

Universidade Federal de Itajubá

Recognized for outstanding research work presented at the V Scientific Initiation Symposium.

Best Work Award at the IV Scientific Initiation Symposium

Universidade Federal de Itajubá

Received recognition for exceptional research contributions at the IV Scientific Initiation Symposium.

Publications

Systematic effects of limb darkening on planetary radius recovery

A publication currently in preparation, focusing on the systematic effects of limb darkening on planetary radius recovery.

Meidem: Multi-grid Epic Interpolator for stellar limb DarkEning Models

A publication currently in preparation, detailing the "Meidem" multi-grid interpolator for stellar limb darkening models.

Interactive simulator of planetary transits and limb-darkening for teaching physics and astronomy

A publication currently in preparation, describing an interactive simulator for planetary transits and limb-darkening, designed for teaching physics and astronomy.

Stellar parameter estimation of stars observed by TESS using the eXtreme Gradient Boosting algorithm and S-PLUS DR5

A publication submitted for collaboration review, focusing on stellar parameter estimation for TESS-observed stars using eXtreme Gradient Boosting and S-PLUS DR5 data.

MEIDEM: Multi-grid Epic Interpolator for stellar limb DarkEning Models [Software]

Zenodo

Software publication providing a multi-grid interpolator for stellar limb darkening models.

MINAS: Machine-learning INtegrated Analysis with photometric Astronomical Surveys [Software]

GitHub

Software for machine-learning integrated analysis with photometric astronomical surveys.

Interactive exoplanet transit simulator as a didactic tool for teaching physics and astronomy

VII National Symposium on Astronomy Education (VII SNEA 2025), Universidade Estadual de Londrina

A publication presented at the VII National Symposium on Astronomy Education, describing an interactive exoplanet transit simulator for teaching physics and astronomy.

Science education in the post-truth era: Flat Earth

Experiências em Ensino de Ciências, 19(2)

A publication discussing science education in the post-truth era, specifically addressing the Flat Earth concept.

Developing a teaching and learning sequence with design-based research about exoplanets

Latin-American Journal of Astronomy Education, 35

A publication detailing the development of a teaching and learning sequence on exoplanets using design-based research.

Dissemination of astronomy in a pandemic Context: difficulties and learnings

Latin-American Journal of Astronomy Education, 34

A publication exploring the challenges and lessons learned in disseminating astronomy education during a pandemic context.

Languages

Portuguese

English

Skills

Programming & Software

Python, C++, Machine Learning frameworks.

Data Analysis

Statistical methods, photometric data processing.

Ícaro Meidem