About me
I'm an associate astronomer at Space Telescope Science Institute, trying to understand the structure of the Galaxy, and especially its dust, using observations of stars. I lead the processing pipeline for the Nancy Grace Roman Space Telescope. I am the survey coordinator for the Dark Energy Spectroscopic Instrument. My recent work uses the DECam and WISE instruments to measure the properties of billions of stars, as part of understanding the Galaxy's stars, gas, and dust. I also use APOGEE spectroscopy to understand how dust properties vary, and the PS1 survey to infer the three-dimensional structure of the dust in the Milky Way.
Projects
- The Roman calibration pipeline and Roman image simulator
- Survey operations and fiber positioning for the Dark Energy Spectroscopic Instrument
- The unWISE Catalog: two billion sources from deep WISE and NEOWISE imaging
- The DECam Plane Survey: a survey of the southern Galactic plane, observing more than 2 billion stars
- Mapping the 3D variation in the Milky Way's extinction curve
- The Milky Way's extinction curve and its variability
- Discovery of the Orion Dust Ring, hinting at Orion's past
- 2D map of dust reddening to 4.5 kpc based on PS1 photometry
- Large, homogeneous catalog of distances to molecular clouds
- The PS1 photometric calibration
- Extinction curve measurements from SDSS stellar spectra
- Blue tip photometric reddening maps from SDSS photometry
Press
- Cosmology results from the first year of the DESI survey! NYT, Space.com, Quanta, Ars Technica, Phys.org, Newsweek
- DECaPS2: 3.3 billion sources in the Galactic plane! PBS, CNN, CBS, Fox, AP, Forbes, Space.com
- Mapping the extinction curve in 3D on Gizmodo (Ryan F. Mandelbaum)
- Orion Dust Ring in Scientific American (Ken Croswell)
- Orion Dust Ring in New Scientist (Liz Kruesi)