Currently in the team
Marshall Perrin: I develop and employ advanced instrumentation for imaging planets and disks around other stars, in particular making extensive use of infrared integral field spectroscopy and imaging polarimetry. I have been a part of the Gemini Planet Imager team since the project's inception over a decade ago, and these days I co-lead GPI's Data Analysis & Data Pipeline team. I carry out observations of nearby circumstellar disks using HST, GPI, and other facilities, and collaborate in the development of our lab testbeds for high contrast and wavefront control.
Dean Hines: I use ultraviolet, optical and infrared imaging, spectropolarimetry and spectroscopy, to investigate active galaxies, quasars, post-main-sequence stars, and the formation and evolution of planetary systems including the Solar System. My research has a particular emphasis on polarimetry and high-contrast imaging of these astrophysical phenomenon. I am a member of the HST/NICMOS and Spitzer/MIPS instrument and science teams, and the JWST/MIRI science and the MIRI Instrument Team Lead at STScI. I am also the PI for the Polarimetry Experiment for Zodiacal Dust, and the Deputy PI for the EXCEDE mission, which is a proposed dedicated coronagraphic imaging polarimetry space telescope designed to investigate the environments of nearby stars.
Laurent Pueyo: High contrast imaging of nearby stars opens new avenues to map regions of the planetary formation phase-space yet unexplored with indirect methods. This technique is also the most promising to search for biomarkers in the atmosphere of earth-like planets in order to eventually address the fascinating question: “Are we alone?” Such observations are however quite challenging: they rely on detecting sources fainter than their host stars by factors ranging from 105 − 107 for young gas giants, to 1010 for earth analogs. I investigate a broad range of problems aimed at facilitating and carrying out direct imaging exo-planetary science. More specifically, I am currently working on:
[a.] High-contrast imaging instrumentation to prepare the ELT/post-JWST era, with long term goals aimed at capturing in-situ planetary formation phenomena and probing for biomarkers in the atmosphere of earth analogs.
[b.] Direct imaging surveys with today’s state of the art facilities, aimed at revealing a broader range of planetary systems, unveiling their formation history and exploring their atmospheric compositions
I played a pioneering role in developing extreme adaptive optics coronagraphy, and was involved in the first three such instruments: The Lyot Project on USAF's AEOS telescope, Project 1640 on Palomar's 200-inch, and the Gemini Planet Imager. I lead high resolution interferometric methods for the James Webb Space Telescope by placing a non-redundant aperture mask in JSWT-NIRISS. I develop instrumentation to address problems of imaging planets around other stars, the environs of supermassive black holes at the centers of Active Galactic Nuclei. I also co-teach a JHU graduate course in Fourier Optics.
Keira Brooks: I am a Senior Research and Instrument Analyst on the Telescopes team. I previously was involved in testing the optical performance of the JWST primary mirror but now I support the JWST FGS team that is imbedded in the Telescopes team and the Coronagraphs Working Group. In the Makidon Optics lab, I work on the HiCAT testbed, developing experimental software and calibration of the testbed.
Christopher Moriarty: I am a Senior Systems Software Engineer at STScI. I primarily develop Python code to control the HiCAT testbed, and in doing so I plan to create a generic library to control other testbeds. The infrastructure I have been developing focuses on object oriented interfaces, automated safe control of hardware and standardization of data collection. While I’m mostly recognized for my software contributions, I’m also learning and contributing to the science goals of the project.
Iva Laginja: I work on JOST, the JWST Optical Simulation Testbed, which is a three lens anastigmat reproducing the optics of JWST, including a segmented deformable mirror. It is used for testing and demonstration of different phase retrieval techniques, like a linear phase diversity algorithm (LAPD), the Hybrid Diversity Algorithm (HDA) which is the baseline phase retrieval technique for JWST, as well as Geometric Phase Retrieval (GPR) and parametric phase retrieval. Furthermore, I am interested in adaptive optics, coronagraphy and exoplanet sciences, specifically circumplanetary environments and detection techniques.
Lucie Leboulleux: I am a PhD student, half attached to the STScI and half to the Laboratoire d’Astrophysique de Marseille, but funded by Onera. My research focuses on high-contrast imaging with segmented telescopes, in particular wavefront correction. I am also developing a novel method for sensitivity analysis of segmented primary mirrors in the context of Earth-like planet imaging.
Charles Lajoie: My work focuses on preparing for the on-orbit alignment of the James Webb Space Telescope. In order to prepare for such a complex task, we will use JOST (James Webb Space Telescope Optical Simulator Testbed), a three-lens transmissive model of JWST that includes a segmented deformable mirror, to exercise the software that will be used to commission JWST. JOST will allow us to become intimately familiar with various steps of the JWST commissioning process and develop contingency strategies for aligning it. I also work on simulations of JWST coronagraphic observations and methods for optimizing coronagraphic performance.
Johan Mazoyer: I am interested in the imaging and study of the close vicinity of young stars, in which often hide debris disks and exoplanets. Both in simulation and experimentally on test beds, I develop wavefront control techniques which, associated to coronagraphs, achieve high contrast imaging in broad spectral bands. I also use image processing methods to detect and analyze circumstellar debris disks.
Previously in the team
STScI projects: ALICE, HICAT.
Alex Greenbaum: I am a graduate student at Johns Hopkins University, working on a high angular resolution technique called non-redundant masking (NRM) that can be used for the direct detection of young planets in the process of formation. I work with the non-redundant mask on the Gemini Planet Imager to look for these young planets and learn about how the instrument performs. I use the same concepts to do simulations for the NRM on the James Webb Space Telescope. I am also interested in wavefront sensing and image reconstruction.
Elena Gofas Salas