Brett M. Morris, PhD

Phase curves and eclipses

Light emitted and reflected by exoplanets

• Observations of scattered light from exoplanet atmospheres
  Morris, Heng & Kitzmann 2024 (A&A)
• Physically-motivated basis functions for temperature maps of exoplanets
  Morris et al. 2022 (A&A)
• CHEOPS Precision Phase Curve of the Super-Earth 55 Cnc e
  Morris et al. 2021 (A&A)
• Kepler's Optical Secondary Eclipse of HAT-P-7b and Probable Detection of Planet-induced Stellar Gravity Darkening
  Morris et al. 2013 (ApJL)

CHEOPS

Collaborator on the ESA CHEOPS mission (2018-2022)

• CHEOPS Precision Phase Curve of the Super-Earth 55 Cnc e
  Morris et al. 2021 (A&A)
• A CHEOPS White Dwarf Transit Search
  Morris et al. 2021 (A&A)

Effects of stellar heterogeneity

Stellar surface brightness variations affect exoplanet observations

• The stellar variability noise floor for transiting exoplanet photometry with PLATO
  Morris et al. 2020 (ApJ)
• Non-detection of Contamination by Stellar Activity in the Spitzer Transit Light Curves of TRAPPIST-1
  Morris et al. 2018 (ApJ)
• Robust Transiting Exoplanet Radii in the Presence of Starspots from Ingress and Egress Durations
  Morris et al. 2018 (AJ)

Stellar heterogeneity

Stellar surface brightness variations, often with implications for exoplanet observations

• Hunt for Starspots in HARPS Spectra of G and K Stars
  Morris et al. 2020 (AJ)
• Stellar Properties of Active G and K Stars: Exploring the Connection between Starspots and Chromospheric Activity
  Morris et al. 2019 (AJ)
• Are Starspots and Plages Co-located on Active G and K Stars?
  Morris et al. 2018 (AJ)
• Non-detection of Contamination by Stellar Activity in the Spitzer Transit Light Curves of TRAPPIST-1
  Morris et al. 2018 (ApJ)
• Spotting stellar activity cycles in Gaia astrometry
  Morris et al. 2018 (MNRAS)

Planet host: Sun

Observations of the Sun-Earth system for distant observers

• The stellar variability noise floor for transiting exoplanet photometry with PLATO
  Morris et al. 2020 (ApJ)
• The solar benchmark: rotational modulation of the Sun reconstructed from archival sunspot records
  Morris et al. 2019 (MNRAS)

Stellar dynamos

Probing the source of stellar magnetism

• A Relationship Between Stellar Age and Spot Coverage
  Morris 2020 (ApJ)
• Starspots of HAT-P-11: Evidence for a Solar-like Dynamo
  Morris et al. 2017 (ApJ)

Planet host: TRAPPIST-1

An ultracool dwarf star with seven Earth-sized exoplanets.

• Possible Bright Starspots on TRAPPIST-1
  Morris et al. 2018 (ApJ)
• Non-detection of Contamination by Stellar Activity in the Spitzer Transit Light Curves of TRAPPIST-1
  Morris et al. 2018 (ApJ)

Planet host: HAT-P-11

Measuring stellar magnetic activity encoded in planetary transits

• Starspots of HAT-P-11: Evidence for a Solar-like Dynamo
  Morris et al. 2017 (ApJ)
• Chromospheric Activity of HAT-P-11: an Unusually Active Planet-Hosting K Star
  Morris et al. 2017 (ApJ)
• Large Starspot Groups on HAT-P-11 in Activity Cycle 1
  Morris et al. 2018 (RNAAS)

Peer-reviewed

• fleck: Fast approximate light curves for starspot rotational modulation
  Morris et al. 2020 (JOSS)
• arcesetc: ARC Echelle Spectrograph Exposure Time Calculator
  Morris et al. 2019 (JOSS)
• aesop: ARC Echelle Spectroscopic Observation Pipeline
  Morris et al. 2018 (JOSS)
• astroplan: An Open Source Observation Planning Package in Python
  Morris et al. 2018 (AJ)

kelp

Compute photometric phase curves of exoplanets.

gadfly

Simulate stellar oscillations and granulation with Gaussian processes

jdaviz

JWST astronomical data analysis tools in the Jupyter platform

astroplan

An astropy-affiliated package for astronomical observation planning

fleck

Fast approximate light curves for starspot rotational modulation

astropy

Core package for Astronomy in Python