Galaxies, Early Universe, Space Telescopes

if I have to summarize my passions in three words

These keywords summarize the things that I am most passionate about, but my scientific interest is certainly not limited to these! The Universe is big and full of mysteries, and there are so many things I want to study. Check out the complete list of publications and my full CV in the links below to learn about what I do. You can also learn more about me from my latest interview! Also check out all my other web profiles.


Research Highlights

Semi-analytic forecasts for the Universe

Project Logo This is a series of work where we provide a comprehensive package of mock catalogues with galaxies predicted with the Santa Cruz SAM. We currently provide predictions for an extremely wide range of physical and observable galaxy properties, and photometry for the James Webb Space Telescope, Roman Space Telescope, Euclid Observatory, Rubin Observatory, as well as Hubble, Spitzer, VISTA, UKIRT, and many others. This comprehensive simulated data is great for all sorts of planning best survey strategies, maximizing scientific productivity of future missions, and exploring multi-instrument synergies.

Semi-analytic forecasts for JWST

Project Logo My dissertation research has been published in a series of work entitled “Semi-analytic forecasts for JWST”, which I studied the co-evolution of galaxy formation and cosmic reionization using semi-analytic methods. Based on these results, we also made recommendations for survey designs for the long-anticipated, premier observatory James Webb Space Telescope. Click the links below to check out the Data Product Portal hosted by the Flatiron Institute and the full list of Forecasts Papers.

Semi-analytic forecasts for Roman

Project Logo We have created some 2 sq. deg. lightcones, aiming to provide forecasts for the coming Nancy Grace Roman Space Telescope and other ground- and space-based facilities. Stay tuned for a large collection of data releases and science publications! My recent talk at the Roman Virtual Lecture Series.

The CEERS Collaboration

Project Logo The Cosmic Evolution Early Release Science (CEERS) Survey is a selected Cycle 1 ERS program that will efficiently cover 100 sq. arcmin of the sky with JWST imaging and spectroscopy, taking advantage of JWST's various parallel observing capabilities. I am a Key Project Architect for the program, major contributor to the pre-launch data products, and Group Leader of the Simulations Working Group and Junior Scientist Working Group. Publications from the CEERS Collaboration are available here.

Get In Touch

  • Address

    Building 34, Office S359
    Observational Cosmology Lab (code 665)
    Astrophysics Science Division
    NASA Goddard Space Flight Center
    8800 Greenbelt Rd, Greenbelt, MD 20771
  • Address

    Muller Building, Office S422C
    Space Telescope Science Institute
    3700 San Martin Dr, Baltimore, MD 21218
  • Email

    aaron {d0t} yung at    [for official communication]
    l {d0t} y {d0t} aaronyung at    [for quick correspondence]

There is more!

Short Bio

Aaron Yung is currently a NASA Postdoctoral Fellow at NASA Goddard Space Flight Center, the world’s leading space telescope development facility . His work focuses on developing physical models for galaxy formation, with specific interest in the early episodes of our universe's evolution history. Aaron’s signature work Semi-analytic forecasts work provides crucial simulated data for NASA’s flagship Webb and Roman Space Telescopes.

Aaron was born in Hong Kong. At the age of 15, he moved to Hawaii with his family and attended Roosevelt High School. After attending the University of Hawaii at Manoa for one year, Aaron transferred to the University of San Francisco and switched majors to physics and mathematics. After that, Aaron pursued graduate study in Astrophysics at Rutgers University and received his training from the Center of Computational Astrophysics at the Flatiron Institute. Aaron received his Ph.D. in 2020 and began immediately working in the Observational Cosmology Laboratory at NASA’s Goddard Space Flight Center, supported by NASA's own prize fellowship program.


容朗殷博士現於美國國家航空暨太空總署任職博士後研究員, 主要工作包括開發模擬早期宇宙中星系演化的物理模型, 以及為詹士偉伯望遠鏡羅曼太空望遠鏡提供可靠的預測數據。容博士亦活躍於和多個觀測團隊合作, 以預測數據優化宇宙觀測策略。容朗殷於2014年在三藩市大學取得物理和數學學士學位, 其後於2020年在羅格斯大學取得天文物理學博士學位, 主要學術成果包括系列論文 Semi-analytic forecasts for the Universe。容博士將於2023年10月開始於太空望遠鏡科學研究所擔任里卡爾多·賈科尼研究員

Use of Name

Yung 容 is my family name, and both names 朗殷 and Aaron were given to me at birth. The former is phonetically translated to "Long Yan", which is shortened to "L. Y.". The preferred way to style my given name in formal settings (e.g. in publications) is "L. Y. Aaron" (note there is an empty space between "L." and "Y."). On all other occasions, I go by "Aaron" or "Aaron Yung". Please also note that "Long Yan Yung" was used briefly in my early career, in case you are looking for some of the very early work I did.