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Andrew Howard

Professor of Astronomy

California Institute of Technology

United States

Research Interests

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About

Andrew Howard is a Professor of Astronomy at the California Institute of Technology, USA. His research areas encompass stellar obliquity, exoplanet characterization, and the dynamics of planetary systems, as evidenced by his recent publications on multivariate planetary systems and the fate of activity cycles in Sun-like stars. He is actively investigating the properties of Kepler red giants and the behaviors of various exoplanets, contributing significant insights to the field of astronomy.

Articles (41)

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Collaborators (34)

Matthew Payne

Harvard-Smithsonian Center for Astrophysics

UNITED STATES

Andrew Howard

Research Interests

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About

Articles (41)

The γ Cephei System: Updated Orbits, Dynamical Architecture, and Limits on Additional Companions

The Keck Planet Finder SURFS-UP Survey. I. Transmission Spectroscopy of WASP-76 b

Spin–Orbit Alignment of Two Neptune-size Planets Younger Than 500 Myr: TOI-560 b and TOI-5082 b

Automated Detection of Double-lined Spectroscopic Binaries in High-resolution Spectra and a Probabilistic Analysis of Stellar Multiplicity

Hydrogen Airglow from an Escaping Ultrahot Jupiter Atmosphere

A Smooth Transition from Giant Planets to Brown Dwarfs from the Radial Occurrence Distribution

TOI-4495: A Pair of Aligned, Near-resonant Sub-Neptunes That Likely Experienced Overstable Migration

Orbital Eccentricities Suggest a Gradual Transition from Giant Planets to Brown Dwarfs

The Transition from Giant Planets to Brown Dwarfs Beyond 1 au from the Stellar Metallicity Distribution

Extreme Winds on the Emerging Dayside of an Ultrahot Jupiter

Stellar Obliquity of the Ultra-short-period Planet System HD 93963

TOI-6324 b: An Earth-mass Ultra-short-period Planet Transiting a Nearby M Dwarf

The True Stellar Obliquity of a Sub-Saturn Planet from the Tierras Observatory and the Keck Planet Finder

The highest mass Kepler red giants – II. Spectroscopic parameters, the amplitude–activity relation, and unexpected halo orbits

TOI-880 is an Aligned, Coplanar, Multiplanet System

The California Legacy Survey. VI. The Fate of Activity Cycles in Sun-like Stars

A Hot Jupiter with a Retrograde Orbit Around A Sun-like Star and a Toy Model of Hot Jupiters in Wide Binary Star Systems

Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. V. Two Giant Planets in Kepler-511 but Only One Ran Away

An Obliquity Measurement of the Hot Neptune TOI-1694b

No Giant Planets in the Eta Cassiopeiae System: Dynamical Implications of a Wide Binary Companion

An Earth-sized Planet on the Verge of Tidal Disruption

Obliquity Constraints for the Extremely Eccentric Sub-Saturn Kepler-1656 b

Additional Doppler Monitoring Corroborates HAT-P-11c as a Planet

The TESS-Keck Survey. VII. A Superdense Sub-Neptune Orbiting TOI-1824*

A Perfect Tidal Storm: HD 104067 Planetary Architecture Creating an Incandescent World

The TESS-Keck Survey. XII. A Dense 1.8 R ⊕ Ultra-short-period Planet Possibly Clinging to a High-mean-molecular-weight Atmosphere after the First Gigayear

Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. IV. Long-term Doppler Spectroscopy for 11 Stars Thought to Host Cool Giant Exoplanets

Investigating the Atmospheric Mass Loss of the Kepler-105 Planets Straddling the Radius Gap

ESPRESSO Observations of Gaia BH1: High-precision Orbital Constraints and no Evidence for an Inner Binary

The California Legacy Survey. IV. Lonely, Poor, and Eccentric: A Comparison between Solitary and Neighborly Gas Giants

Ages of Stars and Planets in the Kepler Field Younger than Four Billion Years

Revisiting Orbital Evolution in HAT-P-2 b and Confirmation of HAT-P-2 c

A Mini-Neptune Orbiting the Metal-poor K Dwarf BD+29 2654

Erratum: “Kepler and the Behemoth: Three Mini-Neptunes in a 40 Million Year Old Association” (2022, AJ, 164, 215)

Revised Properties and Dynamical History for the HD 17156 System

Planet engulfment detections are rare according to observations and stellar modelling

The Orbital Architecture of Qatar-6: A Fully Aligned Three-body System?

A Jupiter Analog Orbiting The Nearby M Dwarf GJ 463

Erratum: “Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. II. Discovery of a Failed Hot Jupiter on a 2.7 yr, Highly Eccentric Orbit” (2021, AJ, 162, 154)

Kepler and the Behemoth: Three Mini-Neptunes in a 40 Million Year Old Association

New Dynamical State and Habitability of the HD 45364 Planetary System

Collaborators (34)

Matthew Payne

Samuel Halverson

Lauren Weiss

Julien de Wit

Phillip MacQueen

Daniel R Hey

Lars A. Buchhave

Paul Robertson

Leslie Rogers

Benjamin Fulton

Fei Dai

Sarah Martell

J N Winn

Dennis Stello

Benjamin T Montet

Aurora Kesseli

Heather Knutson

John Brewer

Rae Holcomb

Christian Schwab

David Latham

Tim Bedding

Stephen Kane

Natalie Batalha

David Charbonneau

Jack Lubin

Crystal Gnilka

Yaguang Li

Daniel Huber

Ashley Chontos

Courtney Crawford

Konstantin Gerbig