activity
20202025
most citedDetection and Bulk Properties of the HR 8799 Planets with High Resolution Spectroscopy

79 citations · 131 across the 7 of their papers we have counts for

collaborators

7 papers

astro-ph.EP2025★ 2 cited

Origins of Mercury's Big Heart of Iron: Exploring Pathways to Form High Core Mass Fraction (CMF) Planets via N-body Simulations

Haniyeh Tajer, Ji Wang, Anna C. Childs +3

Mercury's core mass fraction (CMF) is ~0.7, more than double that of the other rocky planets in the solar system, which have CMFs of ~0.3. The origin of Mercury's large, iron-rich…

astro-ph.EP2025

HD 206893 B at High Spectral Resolution with the Keck Planet Imager and Characterizer (KPIC)

Ben Sappey, Quinn Konopacky, Clarissa R. Do O +38

We present an atmospheric characterization and orbital analysis of HD 206893 B, an exceptionally red, L/T-transition substellar companion in a multiplanetary system, via Keck Plane…

astro-ph.IM2024

Resolving the Young 2 Cygni Run-away Star into a Binary using iLocater

Justin R. Crepp, Jonathan Crass, Andrew J. Bechter +30

Precision radial velocity (RV) spectrographs that use adaptive optics (AO) show promise to advance telescope observing capabilities beyond those of seeing-limited designs. We are b…

astro-ph.EP2021★ 79 cited

Detection and Bulk Properties of the HR 8799 Planets with High Resolution Spectroscopy

Jason J. Wang, Jean-Baptiste Ruffio, Evan Morris +49

Using the Keck Planet Imager and Characterizer (KPIC), we obtained high-resolution (R35,000) -band spectra of the four planets orbiting HR 8799. We clearly detected \water…

astro-ph.EP2021★ 6 cited

Searching For Transiting Planets Around Halo Stars. I. Sample Selection and Validation

Jared R. Kolecki, Ji Wang, Jennifer A. Johnson +3

By measuring the elemental abundances of a star, we can gain insight into the composition of its initial gas cloud -- the formation site of the star and its planets. Planet formati…

astro-ph.IM2020★ 3 cited

Exoplanets Sciences with Nulling Interferometers and a Single-Mode Fiber-Fed Spectrograph

Ji Wang, Colby Jurgenson

Understanding the atmospheres of exoplanets is a milestone to decipher their formation history and potential habitability. High-contrast imaging and spectroscopy of exoplanets is t…

astro-ph.EP2020★ 41 cited

On the Chemical Abundance of HR 8799 and the Planet c

Ji Wang, Jason Wang, Bo Ma +10

Comparing chemical abundances of a planet and the host star reveals the origin and formation path. Stellar abundance is measured with high-resolution spectroscopy. Planet abundance…