Academic CV

Positions

NASA Postdoctoral Program (NPP) Fellow, NASA Ames Research Center
2024 - Present
Advisors: Steve Bryson, Jon Jenkins, Douglas Caldwell

Postdoctoral Research Associate, University of Notre Dame
2022 - 2024
Advisor: Prof. Lauren M. Weiss

Education

Ph.D. in Astronomy & Astrophysics, Pennsylvania State University
Graduate minor in Computational Science
2016 - 2022
Advisor: Prof. Eric B. Ford
Dissertation: Statistical Inference on the Distribution of Exoplanetary Systems: Correlations in Planetary System Architectures

Honours B.Sc. - Astronomy & Physics Specialist, University of Toronto
High Distinction
2012 - 2016
Advisor: Prof. Dae-Sik Moon

To view my full academic CV, click here (last updated Sept 22, 2023).

Publications

• Developing a Drift Rate Distribution for Technosignature Searches of Exoplanets
  Megan G. Li, Sofia Z. Sheikh, Christian Gilbertson, Matthias Y. He, Howard Isaacson, Steve Croft, Evan L. Sneed, 2023, AJ, 166, 182-192

• Beyond 2-D Mass-Radius Relationships: A Nonparametric and Probabilistic Framework for Characterizing Planetary Samples in Higher Dimensions
  Shubham Kanodia, Matthias Y. He, Eric B. Ford, Sujit K. Ghosh, Angie Wolfgang, 2023, AJ, 956, 76-89
  arXiv link: 2308.10615
  Github repository: MRExo

• Inner Planetary System Gap Complexity is a Predictor of Outer Giant Planets
  Matthias Y. He, Lauren M. Weiss, 2023, AJ, 166, 36-48
  arXiv link: 2306.08846
  Press: Universe Today article on our paper

• Debiasing the Minimum-Mass Extrasolar Nebula: On the Diversity of Solid Disk Profiles
  Matthias Y. He, Eric B. Ford, 2022, AJ, 164, 210-220
  arXiv link: 2208.09031

• Edge-of-the-Multis: Evidence for a Transition in the Outer Architectures of Compact Multiplanet Systems
  Sarah C. Millholland, Matthias Y. He, Jon K. Zink, 2022, AJ, 164, 72-87
  arXiv link: 2207.10068

• Friends and Foes: Conditional Occurrence Rates of Exoplanet Companions and their Impact on Radial Velocity Follow-up Surveys
  Matthias Y. He, Eric B. Ford, Darin Ragozzine, 2021b, AJ, 162, 216-238
  arXiv link: 2105.04703

• Evidence for a Non-Dichotomous Solution to the Kepler Dichotomy: Mutual Inclinations of Kepler Planetary Systems from Transit Duration Variations
  Sarah C. Millholland, Matthias Y. He, Eric B. Ford, Darin Ragozzine, Daniel Fabrycky, Joshua N. Winn, 2021, AJ, 162, 166-183
  arXiv link: 2106.15589

• Architectures of Exoplanetary Systems. III: Eccentricity and Mutual Inclination Distributions of AMD-stable Planetary Systems
  Matthias Y. He, Eric B. Ford, Darin Ragozzine, Daniel Carrera, 2020, AJ, 160, 276-314
  arXiv link: 2007.14473
  Press Release: Penn State ICDS News article on our paper
  Github repository: SysSimExClusters (He_et_al_2020b branch)

• Architectures of Exoplanetary Systems. II: An Increase in Inner Planetary System Occurrence Towards Later Spectral Types for Kepler’s FGK Dwarfs
  Matthias Y. He, Eric B. Ford, Darin Ragozzine, 2021a, AJ, 161, 16-40
  arXiv link: 2003.04348
  Github repository: SysSimExClusters (He_Ford_Ragozzine_2020 branch)

• Architectures of Exoplanetary Systems. I: A Clustered Forward Model for Exoplanetary Systems around Kepler’s FGK Stars
  Matthias Y. He, Eric B. Ford, Darin Ragozzine, 2019, MNRAS, 490, 4575-4605
  arXiv link: 1907:07773
  Github repository: SysSimExClusters (He_Ford_Ragozzine_2019 branch)

• On the stability and collisions in triple stellar systems
  Matthias Y. He and Cristobal Petrovich, 2018, MNRAS, 474, 20-31

• First limits on the occurrence rate of short-period planets orbiting brown dwarfs
  Matthias Y. He, Amaury H.M.J. Triaud, Michael Gillon, 2017, MNRAS, 464, 2687-2697

• KMTNet Supernova Program Variable Objects I. NGC 2784 Field
  Matthias Y. He, Dae-Sik Moon, Hilding Neilson, Jae-Joon Lee, Sang Chul Kim, Mina Park, Hong Soo Park, Dong-Jin Kim, Yongseok Lee, Seung-Lee Kim, Chung-Uk Lee, 2016, JKAS, 49, 209-233

• Supernova and optical transient observations using the three wide-field telescope array of the KMTNet
  Dae-Sik Moon, Sang Chul Kim, Jae-Joon Lee, Mina Pak, Hong Soo Park, Matthias Y. He, John Antoniadis, Yuan Qi Ni, Chung-Uk Lee, Seung-Lee Kim, Byeong-Gon Park, Dong-Jin Kim, Sang-Mok Cha, Yongseok Lee, Santiago Gonzalez, 2016, Proc. SPIE 9906

Software Packages

• MRExo
  Language: Python 3
  Developers: Shubham Kanodia, Matthias Y. He

• SysSimPyMMEN
  Language: Python 3
  Developers: Matthias Y. He

• SysSimPyPlots
  Language: Python 3
  Developers: Matthias Y. He

• SysSimExClusters
  Language: Julia
  Developers: Matthias Y. He, Eric B. Ford

• ExoplanetsSysSim
  Language: Julia
  Developers: Eric B. Ford, Matthias Y. He, Danley Hsu, Darin Ragozzine

Conferences and Presentations

• Ames HWO Meeting - Talk (with Aritra Chakrabarty) (Aug 26, 2024 - NASA Ames)

• GLEAM 2023 - Talk (Oct 27-28, 2023 - IU Bloomington)

• Postdoc Lightning Talk Competition, 2nd place finish - 3min Talk (Sep 21, 2023 - Notre Dame)

• Astrophysics Seminar - Talk (Sep 19, 2023 - Notre Dame)

• IU Tea Talk - Talk (Sep 11, 2023 - IU Bloomington)

• Protostars and Planets VII - Poster (Apr 10-15, 2023 - Kyoto, Japan)

• COSE-JAM - Poster (Dec 9, 2022 - Notre Dame)

• GLEAM 2022 - Talk (Nov 17-18, 2022 - Ohio State)

• Penn State Dissertation Defense - Thesis Talk (recording on exoplanet-talks.org!) (Feb 15, 2022 - Virtual)

• ERES VII - Poster (Aug 1-2, 2022 - Penn State)

• DDA 53rd - Poster (Apr 25-28, 2022 - Flatiron Institute)

• Center for Space and Habitability (CSH) Fellowship - Talk (Feb 2, 2022 - Virtual)

• BAEM 39 - Talk (Dec 3, 2021 - Virtual)

• UChicago Exoplanet Group - Talk (Oct 18, 2021 - Virtual)

• ERES VI - Poster (May 24-26, 2021 - Virtual)

• CHEXO - Talk (May 14, 2021 - Virtual)

• PLATO ESP 2020 - Talk (Dec 3, 2020 - Virtual)

• Exoplanet Demographics 2020 - Talk (Nov 11, 2020 - Virtual)

• EPSC 2020 - Talk (Sep 24, 2020 - Virtual)

• CEHW Seminar - Talk (Sep 14, 2020 - Virtual)

• DDA 51st - Talk (August 3, 2020 - Virtual)

• Exoplanets III - Plenary Talk (July 29, 2020 - Virtual)

• CHEXO - Talk (June 26, 2020 - Virtual)

• AAS 236 - iPoster (June 1-3, 2020 - Virtual)

• NASA ExoPAG 21 - Talk (Jan 4, 2020 - Honolulu, HI)
  Also served on a discussion panel of Kepler reliability

• Lunch Talk - Talk (Sep 17, 2019 - Penn State)

• Extreme Solar Systems IV - Talk (Aug 20, 2019 - Reykjavik, Iceland)

• TESS Science Conference I - Poster (Jul 29 - Aug 2, 2019 - MIT)

• Stars and Planets Seminar - Talk (Jul 19, 2019 - CITA/U of T)

• ERES V - Talk (Jun 17, 2019 - Cornell)

• ICS Symposium - Poster (Apr 1, 2019 - Penn State)

• SMAC Talk - Talk (Mar 22, 2019 - Penn State, Dept. of Statistics)

• ERES IV - Talk (Jun 22, 2018 - Penn State)

• Lunch Talk - Talk (Jan 16, 2018 - Penn State)

• ERES III - Talk (Jun 13, 2017 - Yale)

• SAMSI Transition Workshop - Poster (May 9, 2017 - Durham, NC)

• SURP student presentations - Talk (Jul 7, 2016 - CITA/U of T)