Publications (26)
Evidence of Fragmenting Dust Particles from Near-Simultaneous Optical and Near-IR Photometry and Polarimetry of Comet 73P/Schwassmann-Wachmann 3
Terry Jay Jones, David Stark, Charles E. Woodward +4
We report imaging polarimetry of segments B and C of the Jupiter-family Comet 73P/Schwassmann-Wachmann 3 in the I and H bandpasses at solar phase angles of approximately 35 and 85d…
Infrared photonics for healthcare: A roadmap for proactive and predictive health management
Borislav Hinkov, Johannes Kunsch, Werner Mäntele +82
The field of infrared (IR) photonics is currently undergoing remarkable progress, moving rapidly towards practical sensing applications demanded by medical therapy and diagnostics…
The Nature of Starbursts : II. The Duration of Starbursts in Dwarf Galaxies
Kristen B. W. McQuinn, Evan D. Skillman, John M. Cannon +7
The starburst phenomenon can shape the evolution of the host galaxy and the surrounding intergalactic medium. The extent of the evolutionary impact is partly determined by the dura…
Leveraging extreme laser-driven magnetic fields for gamma-ray generation and pair production
Oliver Jansen, Tao Wang, David Stark +2
The ability of an intense laser pulse to propagate in a classically over-critical plasma through the phenomenon of relativistic transparency is shown to facilitate the generation o…
Finding Passive Galaxies in HI-MaNGA: The Impact of Star-Formation Rate Indicator
Nora Salem, Karen Masters, David Stark +1
HI-rich galaxies typically have high star-formation rates (SFR), but there exist interesting HI-rich and low star-forming (low-SF) galaxies. Previous work on a sample of these gala…
Boundary elements with mesh refinements for the wave equation
Heiko Gimperlein, Fabian Meyer, Ceyhun Oezdemir +2
The solution of the wave equation in a polyhedral domain in admits an asymptotic singular expansion in a neighborhood of the corners and edges. In this article we fo…
The growth of the central region by acquisition of counter-rotating gas in star-forming galaxies
Yan-Mei Chen, Yong Shi, Christy A. Tremonti +29
Galaxies grow through both internal and external processes. In about 10% of nearby red galaxies with little star formation, gas and stars are counter-rotating, demonstrating the im…
Short period InGaAs/AlInAs THz quantum cascade laser in thin double metal cavities operating up to 188K
Sebastian Gloor, David Stark, Martin Frankié +4
We present a two-well terahertz (THz) quantum cascade laser designed for high temperature operation based on the InGaAs/AlInAs material system. The lighter effective mass and highe…
HI-MaNGA: Results from (21cm-HI) single-dish observations of MaNGA Survey Galaxies
Karen Masters, David Stark
In a poster presentation for IAU Symposium 392: "Neutral hydrogen in and around galaxies in the SKA era", we gave an overview of the HI-MaNGA project which is working to obtain com…
A Multiwavelength Study of Active Galactic Nuclei in Post-Merger Remnants
Wenhao Li, Preethi Nair, Jimmy Irwin +9
We investigate the role of galaxy mergers in triggering AGN in the nearby Universe. Our analysis is based on a sample of 79 post-merger remnant galaxies with deep X-ray observation…
The Arecibo Legacy Fast ALFA Survey: The ALFALFA Extragalactic HI Source Catalog
Martha P. Haynes, Riccardo Giovanelli, Brian R. Kent +22
We present the catalog of ~31500 extragalactic HI line sources detected by the completed ALFALFA survey out to z < 0.06 including both high signal-to-noise ratio (> 6.5) detections…
The Strength of Bisymmetric Modes in SDSS-IV/MaNGA Barred Galaxy Kinematics
Brian DiGiorgio Zanger, Kyle B. Westfall, Kevin Bundy +7
The SDSS-IV/MaNGA Survey data provide an unprecedented opportunity to study the internal motions of galaxies and, in particular, represent the largest sample of barred galaxy kinem…
Post-Starburst Properties of Post-Merger Galaxies
Wenhao Li, Preethi Nair, Kate Rowlands +10
Post-starburst galaxies (PSBs) are transition galaxies showing evidence of recent rapid star formation quenching. To understand the role of galaxy mergers in triggering quenching,…
A Novel Framework for Modeling Weakly Lensing Shear Using Kinematics and Imaging at Moderate Redshift
Brian DiGiorgio, Kevin Bundy, Kyle B. Westfall +2
Kinematic weak lensing describes the distortion of a galaxy's projected velocity field due to lensing shear, an effect recently reported for the first time by Gurri et al. based on…
Microring quantum cascade surface emitting lasers
David Stark, Mattias Beck, Jérôme Faist
We miniaturize a vertically-coupled in-plane whispering gallery mode cavity incorporating a quantum cascade gain medium, aiming to realize the mid-infrared counterpart to the verti…
Quantum Cascade Surface Emitting Lasers
David Stark, Filippos Kapsalidis, Sergej Markmann +5
A low-cost single frequency laser emitting in the mid-infrared spectral region and dissipating minimal electrical power is a key ingredient for the next generation of portable gas…
The True Durations of Starbursts: HST Observations of Three Nearby Dwarf Starburst Galaxies
Kristen B. W. McQuinn, Evan D. Skillman, John M. Cannon +4
The duration of a starburst is a fundamental parameter affecting the evolution of galaxies yet, to date, observational constraints on the durations of starbursts are not well estab…
On a preconditioner for time domain boundary element methods
Heiko Gimperlein, David Stark
We propose a time stepping scheme for the space-time systems obtained from Galerkin time-domain boundary element methods for the wave equation. Based on extrapolation, the method p…
Photon-driven broadband emission and RF injection locking of THz quantum cascade laser frequency combs
Andres Forrer, Martin Franckié, David Stark +4
We present homogeneous quantum cascade lasers (QCLs) emitting around 3 THz which display bandwidths up to 950 GHz with a single stable beatnote. Devices are spontaneously operating…
Broadband surface-emitting THz laser frequency combs with inverse-designed integrated reflectors
Urban Senica, Sebastian Gloor, Paolo Micheletti +4
THz quantum cascade lasers (QCLs) based on double metal waveguides feature broadband and high-temperature devices for use in spectroscopy and sensing. However, their extreme field…
The Nature of Starbursts: I. The Star Formation Histories of Eighteen Nearby Starburst Dwarf Galaxies
Kristen B. W. McQuinn, Evan D. Skillman, John M. Cannon +7
We use archival HST observations of resolved stellar populations to derive the star formation histories (SFHs) of 18 nearby starburst dwarf galaxies. In this first paper we present…
SDSS-IV MaNGA: The link between bars and the early cessation of star formation in spiral galaxies
Amelia Fraser-McKelvie, Michael Merrifield, Alfonso Aragón-Salamanca +9
Bars are common in low-redshift disk galaxies, and hence quantifying their influence on their host is of importance to the field of galaxy evolution. We determine the stellar popul…
SDSS-IV MaNGA: Evidence for enriched accretion onto satellite galaxies in dense environments
Adam L. Schaefer, Christy Tremonti, Zachary Pace +9
We investigate the environmental dependence of the local gas-phase metallicity in a sample of star-forming galaxies from the MaNGA survey. Satellite galaxies with stellar masses in…
THz intersubband electroluminescence from n-type Ge/SiGe quantum cascade structures
David Stark, Muhammad Mirza, Luca Persichetti +15
We report electroluminescence originating from L-valley transitions in n-type Ge/SiGe quantum cascade structures centered at 3.4 and 4.9 THz with a line broadenin…
A residual a posteriori error estimate for the time-domain boundary element method
Heiko Gimperlein, Ceyhun Oezdemir, David Stark +1
This article investigates residual a posteriori error estimates and adaptive mesh refinements for time-dependent boundary element methods for the wave equation. We obtain reliable…
hp-version time domain boundary elements for the wave equation on quasi-uniform meshes
Heiko Gimperlein, Ceyhun Oezdemir, David Stark +1
Solutions to the wave equation in the exterior of a polyhedral domain or a screen in exhibit singular behavior from the edges and corners. We present quasi-optimal $…