Publications (36)
SO2, silicate clouds, but no CH4 detected in a warm Neptune
Achrene Dyrek, Michiel Min, Leen Decin +44
WASP-107b is a warm (~740 K) transiting planet with a Neptune-like mass of ~30.5 Earth masses and Jupiter-like radius of ~0.94 Jupiter radius, whose extended atmosphere is eroding.…
15NH3 in the atmosphere of a cool brown dwarf
David Barrado, Paul Mollière, Polychronis Patapis +40
Brown dwarfs serve as ideal laboratories for studying the atmospheres of giant exoplanets on wide orbits as the governing physical and chemical processes in them are nearly identic…
The nature of point source fringes in mid-infrared spectra acquired with the James Webb Space Telescope
Ioannis Argyriou, Martyn Wells, Alistair Glasse +10
The constructive and destructive interference in different layers of the James Webb Space Telescope (JWST) Mid-Infrared Instrument (MIRI) detector arrays modulate the detected sign…
Surface Properties of Asteroids from Mid-Infrared Observations and Thermophysical Modeling
Michael Mueller
The subject of this work is the physical characterization of asteroids, focusing on the thermal inertia of near-Earth asteroids (NEAs). Thermal inertia governs the Yarkovsky effect…
Exogenous delivery of water to Mercury
Kateryna Frantseva, David Nesvorný, Michael Mueller +3
Radar and spacecraft observations show the permanently shadowed regions around Mercury's North Pole to contain water ice and complex organic material. One possible source of this m…
Eclipsing Binary Trojan Asteroid Patroclus: Thermal Inertia from Spitzer Observations
Michael Mueller, Franck Marchis, Joshua P. Emery +5
We present mid-infrared (8-33 micron) observations of the binary L5-Trojan system (617) Patroclus-Menoetius before, during, and after two shadowing events, using the Infrared Spect…
The Astropy Problem
Demitri Muna, Michael Alexander, Alice Allen +151
The Astropy Project (http://astropy.org) is, in its own words, "a community effort to develop a single core package for Astronomy in Python and foster interoperability between Pyth…
Spitzer's Solar System studies of asteroids, planets and the zodiacal cloud
David Trilling, Carey Lisse, Dale P. Cruikshank +13
In its 16 years of scientific measurements, the Spitzer Space Telescope performed a number of ground-breaking infrared measurements of Solar System objects. In this second of two p…
NEOSurvey 1: Initial results from the Warm Spitzer Exploration Science Survey of Near Earth Object Properties
David E. Trilling, Michael Mommert, Joseph Hora +6
Near Earth Objects (NEOs) are small Solar System bodies whose orbits bring them close to the Earth's orbit. We are carrying out a Warm Spitzer Cycle 11 Exploration Science program…
Reverse Hurwitz counts of genus 1 curves
Michael Mueller
In this paper, we study a problem that is in a sense a reversal of the Hurwitz counting problem. The Hurwitz problem asks: for a generic target -- with a list of …
The Science Performance of JWST as Characterized in Commissioning
Jane Rigby, Marshall Perrin, Michael McElwain +623
This paper characterizes the actual science performance of the James Webb Space Telescope (JWST), as determined from the six month commissioning period. We summarize the performanc…
Physical characterization and origin of binary near-Earth asteroid (175706) 1996 FG3
Kevin J. Walsh, Marco Delbo, Michael Mueller +2
The near-Earth asteroid (NEA) (175706) 1996 FG3 is a particularly interesting spacecraft target: a binary asteroid with a low-DeltaV heliocentric orbit. The orbit of its satellite…
Thermal inertia of near-Earth asteroids and implications for the magnitude of the Yarkovsky effect
Marco Delbo, Aldo Dell'oro, Alan W. Harris +2
Thermal inertia determines the temperature distribution over the surface of an asteroid and therefore governs the magnitude the Yarkovsky effect. The latter causes gradual drifting…
Physical Characterization of TNOs with JWST
Alex Parker, Noemi Pinilla-Alonso, Pablo Santos-Sanz +14
Studies of the physical properties of Trans-Neptunian Objects (TNOs) are a powerful probe into the processes of planetesimal formation and solar system evolution. JWST will provide…
Observing Near-Earth Objects with the James Webb Space Telescope
Cristina A. Thomas, Paul Abell, Julie Castillo-Rogez +6
The James Webb Space Telescope (JWST) has the potential to enhance our understanding of near-Earth objects (NEOs). We present results of investigations into the observability of NE…
Gas-plasma based generation of broadband THz radiation with 640 mW average power
Joachim Buldt, Henning Stark, Michael Mueller +3
We present a high-power source of broadband terahertz radiation covering the whole THz spectral region (0.1-30 THz). The two-color gas plasma generation process is driven by a stat…
JWST MIRI flight performance: The Medium-Resolution Spectrometer
Ioannis Argyriou, Alistair Glasse, David R. Law +22
The Medium-Resolution Spectrometer (MRS) provides one of the four operating modes of the Mid-Infrared Instrument (MIRI) on board the James Webb Space Telescope (JWST). The MRS is a…
BayesicFitting, a PYTHON Toolbox for Bayesian Fitting and Evidence Calculation
Do Kester, Michael Mueller
BayesicFitting is a comprehensive, general-purpose toolbox for simple and standardized model fitting. Its fitting options range from simple least-squares methods, via maximum likel…
The Discovery of Cometary Activity in Near-Earth Asteroid (3552) Don Quixote
Michael Mommert, Joseph L. Hora, Alan W. Harris +8
The near-Earth object (NEO) population, which mainly consists of fragments from collisions between asteroids in the main asteroid belt, is thought to include contributions from sho…
Observations of the Planetary Nebula SMP LMC 058 with the JWST MIRI Medium Resolution Spectrometer
O. C. Jones, J. Ãlvarez-Márquez, G. C. Sloan +21
During the commissioning of {\em JWST}, the Medium-Resolution Spectrometer (MRS) on the Mid-Infrared Instrument (MIRI) observed the planetary nebula SMP LMC 058 in the Large Magell…
Infrared Lightcurves of Near Earth Objects
Joseph L. Hora, Amir Siraj, Michael Mommert +9
We present lightcurves and derive periods and amplitudes for a subset of 38 near earth objects (NEOs) observed at 4.5 microns with the IRAC camera on the the Spitzer Space Telescop…
Product rule for gauge invariant Weyl symbols and its application to the semiclassical description of guiding center motion
Michael Mueller
We derive a product rule for gauge invariant Weyl symbols which provides a generalization of the well-known Moyal formula to the case of non-vanishing electromagnetic fields. Apply…
ngVLTI: Cost and Feasibility of a Four-Telescope VLTI Expansion for Milliarcsecond-Scale Imaging
Sylvestre Lacour, Johan Kosmalski, Michael Mueller +8
The paper evaluates the technical design and cost feasibility of adding four 8 m-class unit telescopes to the VLTI, presenting a compact segmented‑mirror concept and a rough €80 M…
Asteroid thermophysical modeling
Marco Delbo, Michael Mueller, Joshua P. Emery +2
The field of asteroid thermophysical modeling has experienced an extraordinary growth in the last ten years, as new thermal infrared data became available for hundreds of thousands…
Physical Characterization of Warm Spitzer-observed Near-Earth Objects
Cristina A. Thomas, Joshua P. Emery, David E. Trilling +3
Near-infrared spectroscopy of Near-Earth Objects (NEOs) connects diagnostic spectral features to specific surface mineralogies. The combination of spectroscopy with albedos and dia…
ExploreNEOs III: Physical characterization of 65 low-deltaV NEOs
Michael Mueller, M. Delbo', J. L. Hora +14
Space missions to NEOs are being planned at all major space agencies, and recently a manned mission to an NEO was announced as a NASA goal. Efforts to find and select suitable targ…
MINDS. The detection of CO with JWST-MIRI indicates abundant CO in a protoplanetary disk
Sierra L. Grant, Ewine F. van Dishoeck, Benoît Tabone +43
We present JWST-MIRI MRS spectra of the protoplanetary disk around the low-mass T Tauri star GW Lup from the MIRI mid-INfrared Disk Survey (MINDS) GTO program. Emission from $^{12}…
The scaling potential of beam-splitter-based coherent beam combination
Michael Mueller, Christopher Aleshire, Joachim Buldt +4
The impact of nonlinear refraction and residual absorption on the achievable peak and average power in beam-splitter-based coherent beam combination is analyzed theoretically. Whil…
Temporal contrast enhancement of energeticlaser pulses by filtered self-phase-modulation broadened spectra
Joachim Buldt, Michael Mueller, Robert Klas +3
We present a novel approach for temporal contrast enhancement of energetic laserpulses by filtered SPM broadened spectra. A measured temporal contrast enhancement by at least 7 ord…
Multipass cell for high-power few-cycle compression
Michael Mueller, Joachim Buldt, Henning Stark +2
A multipass cell for nonlinear compression to few-cycle pulse duration is introduced comprising dielectrically enhanced silver mirrors on silicon substrates. Spectral broadening wi…
The Dust Trail of Comet 67P/Churyumov-Gerasimenko between 2004 and 2006
Jessica Agarwal, Michael Mueller, William T. Reach +3
We report on observations of the dust trail of comet 67P/Churyumov-Gerasimenko (CG) in visible light with the Wide Field Imager at the ESO/MPG 2.2m telescope at 4.7 AU before aphel…
MINDS. Abundant water and varying C/O across the disk of Sz 98 as seen by JWST/MIRI
Danny Gasman, Ewine F. van Dishoeck, Sierra L. Grant +41
MIRI/MRS on board the JWST allows us to probe the inner regions of protoplanetary disks. Here we examine the disk around the classical T Tauri star Sz 98, which has an unusually la…
Spectroscopic time series performance of the Mid-Infrared Instrument on the JWST
Jeroen Bouwman, Sarah Kendrew, Thomas P. Greene +21
We present here the first ever mid-infrared spectroscopic time series observation of the transiting exoplanet \object{L 168-9 b} with the Mid-Infrared Instrument (MIRI) on the Jame…
Dust Environment Modelling of Comet 67P/Churyumov-Gerasimenko
Jessica Agarwal, Michael Mueller, Eberhard Gruen
Dust is an important constituent in cometary comae; its analysis is one of the major objectives of ESA's Rosetta mission to comet 67P/Churyumov-Gerasimenko (C-G). Several instrumen…
The Chemical Inventory of the Inner Regions of Planet-forming Disks -- The JWST/MINDS Program
Inga Kamp, Thomas Henning, Aditya M. Arabhavi +40
The understanding of planet formation has changed recently, embracing the new idea of pebble accretion. This means that the influx of pebbles from the outer regions of planet-formi…
Delivery of organics to Mars through asteroid and comet impacts
Kateryna Frantseva, Michael Mueller, Inge Loes ten Kate +2
Given rapid photodissociation and photodegradation, the recently discovered organics in the Martian subsurface and atmosphere were probably delivered in geologically recent times.…