Maximizing Science in the Era of LSST, Stars Study Group Report: Rotation and...
This is the stars chapter of the Kavli workshop report, which resulted from the community-based study of needed US OIR capabilities in the LSST era. The full report, which will include this chapter, is...
View ArticleExamining the Accuracy of Astrophysical Disk Simulations With a Generalized...
We discuss a generalization of the classic Keplerian disk test problem allowing for both pressure and rotational support, as a method of testing astrophysical codes incorporating both gravitation and...
View ArticleEvolution of cosmic star formation in the SCUBA-2 Cosmology Legacy Survey
We present a new exploration of the cosmic star-formation history and dust obscuration in massive galaxies at redshifts $0.5< z<6$. We utilize the deepest 450 and 850$\mu$m imaging from SCUBA-2...
View ArticleApsara: A multi-dimensional unsplit fourth-order explicit Eulerian...
We present a new fourth-order finite-volume hydrodynamics code named Apsara. The code employs the high-order finite-volume method for mapped coordinates developed by Colella et al. (2011) with...
View ArticleDeep Herschel PACS point spread functions [Replacement]
The knowledge of the point spread function (PSF) of imaging instruments represents a fundamental requirement for astronomical observations. The Herschel PACS PSFs delivered by the instrument control...
View ArticleSPAMCART: a code for smoothed particle Monte Carlo radiative transfer...
We present a code for generating synthetic SEDs and intensity maps from Smoothed Particle Hydrodynamics simulation snapshots. The code is based on the Lucy (1999) Monte Carlo Radiative Transfer method,...
View ArticleCalibration artefacts in radio interferometry. III. Phase-only calibration...
This is the third installment in a series of papers in which we investigate calibration artefacts. Calibration artefacts (also known as ghosts or spurious sources) are created when we calibrate with an...
View ArticleSemi-implicit anisotropic cosmic ray transport on an unstructured moving mesh...
In the interstellar medium of galaxies and the intracluster gas of galaxy clusters, the charged particles making up cosmic rays are moving almost exclusively along (but not across) magnetic field...
View ArticleSurveying the Inner Solar System with an Infrared Space Telescope
We present an analysis of surveying the inner Solar System for objects that may pose some threat to the Earth. Most of the analysis is based on understanding the capability provided by Sentinel, a...
View ArticleA rubidium-traced white-light etalon calibrator for radial velocity...
We report on the construction and testing of a vacuum-gap Fabry-P\'erot etalon calibrator for high precision radial velocity spectrographs. Our etalon is traced against a rubidium frequency standard to...
View ArticleNatural guide-star processing for wide-field laser-assisted AO systems
Sky-coverage in laser-assisted AO observations largely depends on the system's capability to guide on the faintest natural guide-stars possible. Here we give an up-to-date status of our natural...
View ArticleAbsolute kinematics of radio-source components in the complete S5 polar cap...
We have carried out a high-precision astrometric analysis of two very-long-baseline-interferometry (VLBI) epochs of observation of the 13 extragalactic radio sources in the complete S5 polar cap...
View ArticleHall current effects in mean-field dynamo theory
The role of the Hall term on large scale dynamo action is investigated by means of the First Order Smoothing Approximation. It is shown that the standard $\alpha$ coefficient is altered, and is zero...
View ArticleMulti-region relaxed Hall magnetohydrodynamics with flow [Cross-Listing]
The recent formulations of multi-region relaxed magnetohydrodynamics (MRxMHD) have generalized the famous Woltjer-Taylor states by incorporating a collection of "ideal barriers" that prevent global...
View ArticleCorrection of distortion for optimal image stacking in Wide Field Adaptive...
The advent of Wide Field Adaptive Optics (WFAO) systems marks the beginning of a new era in high spatial resolution imaging. The newly commissioned Gemini South Multi-Conjugate Adaptive Optics System...
View ArticleThree years of harvest with the vector vortex coronagraph in the thermal...
For several years, we have been developing vortex phase masks based on sub-wavelength gratings, known as Annular Groove Phase Masks. Etched onto diamond substrates, these AGPMs are currently designed...
View ArticleThe long-term scientific benefits of a space economy
Utilisation of the material and energy resources of the Solar System will be essential for the development of a sustainable space economy and associated infrastructure. Science will be a major...
View ArticleApplication of the Allan Variance to Time Series Analysis in Astrometry and...
The Allan variance (AVAR) was introduced 50 years ago as a statistical tool for assessing of the frequency standards deviations. For the past decades, AVAR has increasingly being used in geodesy and...
View ArticleThe source structure of 0642+449 detected from the CONT14 observations
The CONT14 campaign with state-of-the-art VLBI data has observed the source 0642+449 with about one thousand observables each day during a continuous observing period of fifteen days, providing tens of...
View ArticleBICEP3 performance overview and planned Keck Array upgrade
BICEP3 is a 520 mm aperture, compact two-lens refractor designed to observe the polarization of the cosmic microwave background (CMB) at 95 GHz. Its focal plane consists of modularized tiles of...
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