812 citations · 2k across the 19 of their papers we have counts for
13 papers · 1 filter
Pushing Automated Abundance Derivations Into the Cool Star Regime: A Test Using Three G and Two K Stars in Praesepe
Marwan Gebran, Marcel A. Agüeros, Keith Hawkins +2
We present the results of an abundance analysis of three G and two K dwarfs in the Praesepe open cluster based on high-resolution, moderate signal-to-noise-ratio spectra obtained w…
Are Starspots and Plages Co-Located on Active G and K Stars?
Brett M. Morris, Jason L. Curtis, Stephanie T. Douglas +4
We explore the connection between starspots and plages of three main-sequence stars by studying the chromospheric and photospheric activity over several rotation periods. We presen…
Non-detection of Contamination by Stellar Activity in the Spitzer Transit Light Curves of TRAPPIST-1
Brett M. Morris, Eric Agol, Leslie Hebb +6
We apply the transit light curve self-contamination technique of Morris et al. (2018) to search for the effect of stellar activity on the transits of the ultracool dwarf TRAPPIST-1…
Extreme precision photometry from the ground with beam-shaping diffusers for K2, TESS and beyond
Gudmundur Stefansson, Suvrath Mahadevan, John Wisniewski +7
The Transiting Exoplanet Survey Satellite (TESS, launched early 2018) is expected to find a multitude of new transiting planet candidates around the nearest and brightest stars. Ti…
Robust Transiting Exoplanet Radii in the Presence of Starspots from Ingress and Egress Durations
Brett M. Morris, Eric Agol, Leslie Hebb +1
We typically measure the radii of transiting exoplanets from the transit depth, which is given by the ratio of cross-sectional areas of the planet and star. However, if a star has…
Diffuser-assisted Photometric Follow-up Observations of the Neptune-sized Planets K2-28b and K2-100b
Gudmundur Stefansson, Yiting Li, Suvrath Mahadevan +5
We present precision transit observations of the Neptune-sized planets K2-28b and K2-100b, using the Engineered Diffuser on the ARCTIC imager on the ARC 3.5m Telescope at Apache Po…