J. A. Eisner
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View article: NIRC2 Interferometric Imaging of the HD 34282 Transition Disk’s Small Grain Structure
NIRC2 Interferometric Imaging of the HD 34282 Transition Disk’s Small Grain Structure Open
The HD 34282 transition disk is a favorable location for protoplanet searches given its complex substructures that may be driven by planet formation. Early millimeter continuum studies revealed a cavity with a stellar-centric radius of 0 …
View article: First demonstration of kernel phase interferometry on JWST/MIRI: prospects for future planet searches around post main sequence stars
First demonstration of kernel phase interferometry on JWST/MIRI: prospects for future planet searches around post main sequence stars Open
Kernel phase interferometry (KPI) is a post-processing technique that treats a conventional telescope as an interferometer by accurately modeling a telescope pupil as an array of virtual subapertures. KPI provides angular resolution within…
View article: exoALMA. XI. ALMA Observations and Hydrodynamic Models of LkCa 15: Implications for Planetary Mass Companions in the Dust Continuum Cavity
exoALMA. XI. ALMA Observations and Hydrodynamic Models of LkCa 15: Implications for Planetary Mass Companions in the Dust Continuum Cavity Open
In the past decade, the Atacama Large Millimeter/submillimeter Array (ALMA) has revealed a plethora of substructures in the disks surrounding young stars. These substructures have several proposed formation mechanisms, with one leading the…
View article: Constraining Free–Free Emission and Photoevaporative Mass-loss Rates for Known Proplyds and New VLA–identified Candidate Proplyds in NGC 1977
Constraining Free–Free Emission and Photoevaporative Mass-loss Rates for Known Proplyds and New VLA–identified Candidate Proplyds in NGC 1977 Open
We present NSF's Karl G. Jansky Very Large Array observations covering the NGC 1977 region at 3.0, 6.4, and 15.0 GHz. We search for compact radio sources and detect continuum emission from 34 NGC 1977 cluster members and 37 background obje…
View article: Constraining free-free emission and photoevaporative mass loss rates for known proplyds and new VLA-identified candidate proplyds in NGC 1977
Constraining free-free emission and photoevaporative mass loss rates for known proplyds and new VLA-identified candidate proplyds in NGC 1977 Open
We present Karl G. Jansky Very Large Array observations covering the NGC 1977 region at 3.0, 6.4, and 15.0 GHz. We search for compact radio sources and detect continuum emission from 34 NGC 1977 cluster members and 37 background objects. O…
View article: High-angular-resolution Imaging of the V892 Tau Binary System: A New Circumprimary Disk Detection and Updated Orbital Constraints
High-angular-resolution Imaging of the V892 Tau Binary System: A New Circumprimary Disk Detection and Updated Orbital Constraints Open
We present a direct imaging study of V892 Tau, a young Herbig Ae/Be star with a close-in stellar companion and circumbinary disk. Our observations consist of images acquired via Keck II/NIRC2 with nonredundant masking and the pyramid wavef…
View article: Simulating medium-spectral-resolution exoplanet characterization with SCALES angular/reference differential imaging
Simulating medium-spectral-resolution exoplanet characterization with SCALES angular/reference differential imaging Open
SCALES (Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy) is a 2 - 5 micron high-contrast lenslet-based integral field spectrograph (IFS) designed to characterize exoplanets and their atmospheres. The SCALES medium-spectra…
View article: The Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy (SCALES): driving science cases and expected outcomes
The Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy (SCALES): driving science cases and expected outcomes Open
The Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy (SCALES) is a $2-5~μ$m, high-contrast integral field spectrograph (IFS) currently being built for Keck Observatory. With both low ($R\lesssim250$) and medium ($R\sim3500…
View article: High Angular Resolution Imaging of the V892 Tau Binary System: A New Circumprimary Disk Detection and Updated Orbital Constraints
High Angular Resolution Imaging of the V892 Tau Binary System: A New Circumprimary Disk Detection and Updated Orbital Constraints Open
We present a direct imaging study of V892 Tau, a young Herbig Ae/Be star with a close-in stellar companion and circumbinary disk. Our observations consist of images acquired via Keck 2/NIRC2 with non-redundant masking and the pyramid wavef…
View article: Isolating Dust and Free–Free Emission in ONC Proplyds with ALMA Band 3 Observations
Isolating Dust and Free–Free Emission in ONC Proplyds with ALMA Band 3 Observations Open
The Orion Nebula Cluster (ONC) hosts protoplanetary disks experiencing external photoevaporation by the cluster’s intense UV field. These “proplyds” are comprised of a disk surrounded by an ionization front. We present ALMA Band 3 (3.1 mm)…
View article: Recovering simulated planet and disk signals using SCALES aperture masking
Recovering simulated planet and disk signals using SCALES aperture masking Open
The Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy\n(SCALES) instrument is a lenslet-based integral field spectrograph that will\noperate at 2 to 5 microns, imaging and characterizing colder (and thus older)\nplanets tha…
View article: Isolating Dust and Free-Free Emission in ONC Proplyds with ALMA Band 3 Observations
Isolating Dust and Free-Free Emission in ONC Proplyds with ALMA Band 3 Observations Open
The Orion Nebula Cluster (ONC) hosts protoplanetary disks experiencing external photoevaporation by the cluster's intense UV field. These ``proplyds" are comprised of a disk surrounded by an ionization front. We present ALMA Band 3 (3.1 mm…
View article: Systematic Multiepoch Monitoring of LkCa 15: Dynamic Dust Structures on Solar System Scales
Systematic Multiepoch Monitoring of LkCa 15: Dynamic Dust Structures on Solar System Scales Open
We present the highest-angular-resolution infrared monitoring of LkCa 15, a young solar analog hosting a transition disk. This system has been the subject of a number of direct-imaging studies from the millimeter through the optical, which…
View article: Systematic Multi-Epoch Monitoring of LkCa 15: Dynamic Dust Structures on Solar-System Scales
Systematic Multi-Epoch Monitoring of LkCa 15: Dynamic Dust Structures on Solar-System Scales Open
We present the highest angular resolution infrared monitoring of LkCa 15, a young solar analog hosting a transition disk. This system has been the subject of a number of direct imaging studies from the millimeter through the optical, which…
View article: Chemical Modeling of Orion Nebula Cluster Disks: Evidence for Massive, Compact Gas Disks with Interstellar Gas-to-dust Ratios
Chemical Modeling of Orion Nebula Cluster Disks: Evidence for Massive, Compact Gas Disks with Interstellar Gas-to-dust Ratios Open
The stellar cluster environment is expected to play a central role in the evolution of circumstellar disks. We use thermochemical modeling to constrain the dust and gas masses, disk sizes, UV and X-ray radiation fields, viewing geometries,…
View article: The Large Binocular Telescope Interferometer as an ELT pathfinder
The Large Binocular Telescope Interferometer as an ELT pathfinder Open
The Large Binocular Telescope (LBT) Interferometer (LBTI) is a strategic instrument that combines the two 8.4m apertures of the LBT for sensitive, high-angular resolution imaging and interferometric observations at thermal infrared wavelen…
View article: Chemical modeling of Orion Nebula Cluster disks: evidence for massive, compact gas disks with ISM-like gas-to-dust ratios
Chemical modeling of Orion Nebula Cluster disks: evidence for massive, compact gas disks with ISM-like gas-to-dust ratios Open
The stellar cluster environment is expected to play a central role in the evolution of circumstellar disks. We use thermochemical modeling to constrain the dust and gas masses, disk sizes, UV and X-ray radiation fields, viewing geometries,…
View article: Large Binocular Telescope Search for Companions and Substructures in the (Pre)transitional Disk of AB Aurigae
Large Binocular Telescope Search for Companions and Substructures in the (Pre)transitional Disk of AB Aurigae Open
Multiwavelength high-resolution imaging of protoplanetary disks has revealed the presence of multiple, varied substructures in their dust and gas components, which might be signposts of young, forming planetary systems. AB Aurigae bears an…
View article: Small Protoplanetary Disks in the Orion Nebula Cluster and OMC1 with ALMA
Small Protoplanetary Disks in the Orion Nebula Cluster and OMC1 with ALMA Open
The Orion Nebula Cluster (ONC) is the nearest dense star-forming region at ∼400 pc away, making it an ideal target to study the impact of high stellar density and proximity to massive stars (the Trapezium) on protoplanetary disk evolution.…
View article: Small Protoplanetary Disks in the Orion Nebula Cluster and OMC1 with ALMA
Small Protoplanetary Disks in the Orion Nebula Cluster and OMC1 with ALMA Open
This is a supplement to 'Small Protoplanetary Disks in the Orion Nebula Cluster and OMC1 with ALMA', Otter and Ginsburg et al 2021, ApJ. All the code for this work can be found in the github repo: https://github.com/jaotter/summer_research…
View article: Betelgeuse scope: single-mode-fibers-assisted optical interferometer design for dedicated stellar activity monitoring
Betelgeuse scope: single-mode-fibers-assisted optical interferometer design for dedicated stellar activity monitoring Open
Betelgeuse has gone through a sudden shift in its brightness and dimmed mysteriously. This is likely caused by a hot blob of plasma ejected from Betelgeuse and then cooled to obscuring dust. If true, it is a remarkable opportunity to direc…
View article: Protoplanetary disk masses in NGC 2024: Evidence for two populations
Protoplanetary disk masses in NGC 2024: Evidence for two populations Open
Context. Protoplanetary disks in dense, massive star-forming regions are strongly affected by their environment. How this environmental impact changes over time is an important constraint on disk evolution and external photoevaporation mod…
View article: Protoplanetary Disks in the Orion Nebula Cluster: Gas Disk Morphologies and Kinematics as seen with ALMA
Protoplanetary Disks in the Orion Nebula Cluster: Gas Disk Morphologies and Kinematics as seen with ALMA Open
We present Atacama Large Millimeter Array CO(3$-$2) and HCO$^+$(4$-$3) observations covering the central $1\rlap{.}'5$$\times$$1\rlap{.}'5$ region of the Orion Nebula Cluster (ONC). The unprecedented level of sensitivity ($\sim$0.1 mJy bea…
View article: High-precision Dynamical Masses of Pre-main-sequence Stars with ALMA and Gaia
High-precision Dynamical Masses of Pre-main-sequence Stars with ALMA and Gaia Open
The Keplerian rotation in protoplanetary disks can be used to robustly measure stellar masses at very high precision if the source distance is known. We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of spatially …
View article: The LEECH Exoplanet Imaging Survey: Limits on Planet Occurrence Rates under Conservative Assumptions
The LEECH Exoplanet Imaging Survey: Limits on Planet Occurrence Rates under Conservative Assumptions Open
We present the results of the largest L ′ (3.8 μ m) direct imaging survey for exoplanets to date, the Large Binocular Telescope Interferometer Exozodi Exoplanet Common Hunt (LEECH). We observed 98 stars with spectral types from B to M. Coo…
View article: Probing Effect Of External Uv Radiation On Young Stellar And Substellar Mass Objects: Is Orion A Special Place For Observing External Photoevaporation Of Disks?
Probing Effect Of External Uv Radiation On Young Stellar And Substellar Mass Objects: Is Orion A Special Place For Observing External Photoevaporation Of Disks? Open
Does star and planet formation environment matter for their circumstellar disk evolution and their properties? What are the observational signatures and theoretical implication? UV radiation from massive stars may affect the disk propertie…
View article: A VLA SURVEY FOR FAINT COMPACT RADIO SOURCES IN THE ORION NEBULA CLUSTER
A VLA SURVEY FOR FAINT COMPACT RADIO SOURCES IN THE ORION NEBULA CLUSTER Open
We present Karl G. Jansky Very Large Array 1.3, 3.6, and 6 cm continuum maps of compact radio sources in the Orion Nebular Cluster (ONC). We mosaicked 34 arcmin 2 at 1.3 cm, 70 arcmin 2 at 3.6 cm and 109 arcmin 2 at 6 cm, containing 778 ne…
View article: L-BAND SPECTROSCOPY WITH MAGELLAN-AO/Clio2: FIRST RESULTS ON YOUNGLOW-MASS COMPANIONS
L-BAND SPECTROSCOPY WITH MAGELLAN-AO/Clio2: FIRST RESULTS ON YOUNGLOW-MASS COMPANIONS Open
L-band spectroscopy is a powerful probe of cool low-gravity atmospheres: the P, Q, and R branch fundamental transitions of methane near 3.3 μ m provide a sensitive probe of carbon chemistry; cloud thickness modifies the spectral slope acro…