Publications (29)
On shocks driven by high-mass planets in radiatively inefficient disks. II. Three-dimensional global disk simulations
Wladimir Lyra, Alexander J. W. Richert, Aaron Boley +4
Recent high-resolution, near-infrared images of protoplanetary disks have shown that these disks often present spiral features. Spiral arms are among the structures predicted decad…
Signatures of Young Planets in the Continuum Emission From Protostellar Disks
Andrea Isella, Neal Turner
Many protostellar disks show central cavities, rings, or spiral arms likely caused by low-mass stellar or planetary companions, yet few such features are conclusively tied to bodie…
Comets in context: Comparing comet compositions with protosolar nebula models
Karen Willacy, Neal Turner, Boncho Bonev +5
Comets provide a valuable window into the chemical and physical conditions at the time of their formation in the young solar system. We seek insights into where and when these obje…
Two-Dimensional Hydrodynamic Simulations of Convection in Radiation-Dominated Accretion Disks
Eric Agol, Julian Krolik, Neal Turner +1
The standard equilibrium for radiation-dominated accretion disks has long been known to be viscously, thermally, and convectively unstable, but the nonlinear development of these i…
The Habitable Exoplanet Observatory (HabEx) Mission Concept Study Final Report
B. Scott Gaudi, Sara Seager, Bertrand Mennesson +183
The Habitable Exoplanet Observatory, or HabEx, has been designed to be the Great Observatory of the 2030s. For the first time in human history, technologies have matured sufficient…
VADER: A Variational Autoencoder to Infer Planetary Masses and Gas-Dust Disk Properties Around Young Stars
Sayed Shafaat Mahmud, Sayantan Auddy, Neal Turner +1
We present \textbf{VADER} (Variational Autoencoder for Disks Embedded with Rings), for inferring both planet mass and global disk properties from high-resolution ALMA dust continuu…
The Substructures in Disks undergoing Vertical Shear Instability: II. Observational Predictions for the Dust Continuum
Diana Blanco, Luca Ricci, Mario Flock +1
High-angular resolution observations at sub-millimeter/millimeter wavelengths of disks surrounding young stars have shown that their morphology is made of azimuthally-symmetric or…
Unveiling the Chemical Complexity and C/O Ratio of the HD 163296 Protoplanetary Disk: Constraints from Multi-line ALMA Observations of Organics, Nitriles, Sulfur-bearing, and Deuterated Molecules
Parashmoni Kashyap, Liton Majumdar, Edwin A. Bergin +13
The physical and chemical conditions within a protoplanetary disk play a crucial role in determining its chemical composition, which is subsequently inherited by any forming planet…
Inferring (Sub)millimeter Dust Opacities and Temperature Structure in Edge-on Protostellar Disks From Resolved Multi-Wavelength Continuum Observations: The Case of the HH 212 Disk
Zhe-Yu Daniel Lin, Chin-Fei Lee, Zhi-Yun Li +2
(Sub)millimeter dust opacities are required for converting the observable dust continuum emission to the mass, but their values have long been uncertain, especially in disks around…
The Dynamics of Infall and Accretion Shocks in the Outer Disk
Susan Terebey, Loraine Sandoval Ascencio, Lizxandra Flores-Rivera +2
High-spatial-resolution observations of disks around young stars suggest planetary systems begin forming early, during the protostellar phase (< 1 Myr) when stars accrete most of t…
Physical and Chemical Structure of the Disk and Envelope of the Class 0/I Protostar L1527
Lizxandra Flores-Rivera, Susan Terebey, Karen Willacy +3
Sub-millimeter spectral line and continuum emission from the protoplanetary disks and envelopes of protostars are powerful probes of their structure, chemistry, and dynamics. Here…
The Planet Formation Imager
John D. Monnier, Stefan Kraus, Michael J. Ireland +36
The Planet Formation Imager (PFI, www.planetformationimager.org) is a next-generation infrared interferometer array with the primary goal of imaging the active phases of planet for…
Jets from the Upper Scorpius Variable Young Star System 2MASS J16075796-2040087 Via KECK/HIRES Spectro-astrometry
Emma Whelan, Miriam Keppler, Neal Turner +4
2MASS J16075796-2040087 is a ~ 5 Myr young star in Upper Sco with evidence for accretion bursts on a timescale of about 15 days and, uncommonly for its age, outflows traced by mult…
The Super-Earth Opportunity - Search for Habitable Exoplanets in the 2020s
Renyu Hu, Charles A. Beichman, David Brain +23
The recent discovery of a staggering diversity of planets beyond the Solar System has brought with it a greatly expanded search space for habitable worlds. The Kepler exoplanet sur…
Planet Formation Imager (PFI): science vision and key requirements
Stefan Kraus, John D. Monnier, Michael J. Ireland +75
The Planet Formation Imager (PFI) project aims to provide a strong scientific vision for ground-based optical astronomy beyond the upcoming generation of Extremely Large Telescopes…
Linking atmospheric chemistry of the hot Jupiter HD 209458b to its formation location through infrared transmission and emission spectra
Spandan Dash, Liton Majumdar, Karen Willacy +6
The elemental ratios of carbon, nitrogen, and oxygen in the atmospheres of hot Jupiters may hold clues to their formation locations in the protostellar disc. In this work, we adopt…
On shocks driven by high-mass planets in radiatively inefficient disks. I. Two-dimensional global disk simulations
Alexander J. W. Richert, Wladimir Lyra, Aaron Boley +2
Recent observations of gaps and non-axisymmetric features in the dust distributions of transition disks have been interpreted as evidence of embedded massive protoplanets. However,…
Applications of Fast Magnetic Reconnection Models to the Atmospheres of the Sun and Protoplanetary Disks
Fulvia Pucci, Alkendra Singh, Uma Gorti +4
Partially-ionized plasmas consist of charged and neutral particles whose mutual collisions modify magnetic reconnection compared with the fully-ionized case. The collisions alter t…
The Habitable Exoplanet Observatory (HabEx) Mission Concept Study Interim Report
B. Scott Gaudi, Sara Seager, Bertrand Mennesson +79
For the first time in human history, technologies have matured sufficiently to enable a mission capable of discovering and characterizing habitable planets like Earth orbiting sunl…
Water vapor as a probe of the origin of gas in debris disks
Yasuhiro Hasegawa, Riouhei Nakatani, Isabel Rebollido +5
Debris disks embrace the formation and evolution histories of planetary systems. Recent detections of gas in these disks have received considerable attention, as its origin ties up…
Inferring Planet and Disk Parameters from Protoplanetary Disk Images Using a Variational Autoencoder
Sayed Shafaat Mahmud, Sayantan Auddy, Neal Turner +1
Dust-continuum observations of many protoplanetary disks reveal rings and gaps that are widely interpreted as evidence of ongoing planet formation. Here we present the first framew…
Planet formation: The case for large efforts on the computational side
Wladimir Lyra, Thomas Haworth, Bertram Bitsch +54
Modern astronomy has finally been able to observe protoplanetary disks in reasonable resolution and detail, unveiling the processes happening during planet formation. These observe…
Witnessing Planetary Systems in the Making with the Next Generation Very Large Array
Luca Ricci, Andrea Isella, Sean M. Andrews +19
The discovery of thousands of exoplanets over the last couple of decades has shown that the birth of planets is a very efficient process in nature. Theories invoke a multitude of m…
Chemistry in the GG Tau A Disk: Constraints from H2D+, N2H+, and DCO+ High Angular Resolution ALMA Observations
Parashmoni Kashyap, Liton Majumdar, Anne Dutrey +17
Resolved molecular line observations are essential for gaining insight into the physical and chemical structure of protoplanetary disks, particularly in cold, dense regions where p…
A comprehensive understanding of planet formation is required for assessing planetary habitability and for the search for life
Dániel Apai, Fred Ciesla, Gijs D. Mulders +14
Dozens of habitable zone, approximately earth-sized exoplanets are known today. An emerging frontier of exoplanet studies is identifying which of these habitable zone, small planet…
Understanding Mass-Loss and the late Evolution of Intermediate Mass Stars: Jets, Disks, Binarity, Dust and Magnetic Fields
Raghvendra Sahai, Bruce Balick, Eric Blackman +7
Almost all stars in the 1-8 Msun range evolve through the Asymptotic Giant Branch (AGB), preplanetary nebula (PPN) and planetary nebula (PN) evolutionary phases. Most stars that le…
Non-Equilibrium Chemistry of Dynamically Evolving Prestellar Cores: II. Ionization and Magnetic Field
Konstantinos Tassis, Karen Willacy, Harold W. Yorke +1
We study the effect that non-equilibrium chemistry in dynamical models of collapsing molecular cloud cores has on measurements of the magnetic field in these cores, the degree of i…
On Shocks Driven by High-mass Planets in Radiatively Inefficient Disks. III. Observational Signatures in Thermal Emission and Scattered Light
Blake Hord, Wladimir Lyra, Mario Flock +2
Recent observations of the protoplanetary disk around the Herbig Be star HD 100546 show two bright features in infrared (H and L' bands) at about 50 AU, with one so far unexplained…
CSI 2264: Simultaneous optical and infrared light curves of young disk-bearing stars in NGC 2264 with CoRoT and Spitzer-- evidence for multiple origins of variability
Ann Marie Cody, John Stauffer, Annie Baglin +42
We present the Coordinated Synoptic Investigation of NGC 2264, a continuous 30-day multi-wavelength photometric monitoring campaign on more than 1000 young cluster members using 16…