scholarly journals The roAp Stars Observed by the Kepler Space Telescope

2021 ◽  
Vol 8 ◽  
Author(s):  
Daniel L. Holdsworth
Keyword(s):  
High Resolution ◽  
Data Sets ◽  
Resolution Time ◽  
Time Resolved ◽  
Single Star ◽  
Space Telescope ◽  
Time Resolved Spectroscopy ◽  
Entire Data ◽  
The Wire ◽  
Kepler Space Telescope

Before the launch of the Kepler Space Telescope, most studies of the rapidly oscillating Ap (roAp) stars were conducted with ground-based photometric B observations, supplemented with high-resolution time-resolved spectroscopy and some space observations with the WIRE, MOST, and BRITE satellites. These modes of observation often only provided information on a single star at a time, however, Kepler provided the opportunity to observe hundreds of thousands of stars simultaneously. Over the duration of the primary 4 year Kepler mission, and its 4 year reconfigured K2 mission, the telescope observed at least 14 new and known roAp stars. This paper provides a summary the results of these observations, including a first look at the entire data sets, and provides a look forward to NASA's TESS mission.

Mapping cardiac-induced lung motion using high-resolution time-resolved phase-contrast synchrotron computed tomography

2018 ◽  
Author(s):  
Luca Fardin ◽  
Ludovic Broche ◽  
Goran Lovric ◽  
Anders Larsson ◽  
Alberto Bravin ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Phase Contrast ◽  
Resolution Time ◽  
Time Resolved ◽  
Lung Motion

Probing Benzene in a New Way:  High-Resolution Time-resolved Rotational Spectroscopy†

2001 ◽  
Vol 105 (23) ◽  
pp. 5618-5621 ◽  
Author(s):  
Christoph Riehn ◽  
Andreas Weichert ◽  
Bernhard Brutschy
Keyword(s):  
High Resolution ◽  
Rotational Spectroscopy ◽  
Resolution Time ◽  
Time Resolved

scholarly journals A Geostationary Instrument Simulator for Aerosol Observing System Simulation Experiments

Atmosphere ◽  
2018 ◽  
Vol 10 (1) ◽  
pp. 2 ◽  
Author(s):  
Patricia Castellanos ◽  
Arlindo da Silva ◽  
Anton Darmenov ◽  
Virginie Buchard ◽  
Ravi Govindaraju ◽  
...  
Keyword(s):  
High Resolution ◽  
Rayleigh Scattering ◽  
System Simulation ◽  
Visible Spectral Range ◽  
Geostationary Orbit ◽  
Atmospheric Composition ◽  
Resolution Time ◽  
Time Resolved ◽  
The Impact ◽  
Time Resolved Measurements

In the near future, there will be several new instruments measuring atmospheric composition from geostationary orbit over North America, East Asia, and Europe. This constellation of satellites will provide high resolution, time resolved measurements of trace gases and aerosols for monitoring air quality and tracking pollution sources. This paper describes a detailed, fast, and accurate (less than 1.0% uncertainty) method for calculating synthetic top of the atmosphere (TOA) radiances from a global simulation with a mesoscale free running model, the GEOS-5 Nature Run, for remote sensing instruments in geostationary orbit that measure in the ultraviolet-visible spectral range (UV-Vis). Generating these synthetic observations is the first step of an Observing System Simulation Experiment (OSSE), a framework for evaluating the impact of a new observation or algorithm. This paper provides details of the model sampling, aerosol and cloud optical properties, surface reflectance modeling, Rayleigh scattering calculations, and a discussion of the uncertainties of the simulated TOA radiance. An application for the simulated TOA radiance observations is demonstrated in the manuscript. Simulated TEMPO (Tropospheric Emissions: Monitoring of Pollution) and GOES-R (Geostationary Operational Environmental Satellites) observations were used to show how observations from the two instruments could be combined to facilitate aerosol type discrimination. The results demonstrate the viability of a detailed instrument simulator for radiance measurements in the UV-Vis that is capable of accurately simulating high resolution, time-resolved measurements with reasonable computational efficiency.

scholarly journals OPTICAL AND ULTRAVIOLET STELLAR FLARE SPECTROSCOPY

1983 ◽  
Vol 71 ◽  
pp. 207-221
Author(s):  
Simon P. Worden
Keyword(s):  
High Resolution ◽  
Solar Flares ◽  
Spectroscopic Data ◽  
Resolution Time ◽  
Stellar Flare ◽  
Dwarf Stars ◽  
Time Resolved ◽  
International Ultraviolet Explorer ◽  
M Dwarf Stars ◽  
M Dwarf

As for solar flares, one of the most physically revealing types of data for M-dwarf flares are high-resolution, time-resolved spectra. Due to the intrinsically faint nature of the M-dwarf stars, spectroscopic data has tended to be of low spectral (˜ 5 Ǻ) and temporal (˜ 5 min) resolution. However, with the development of image intensified spectrographs and fast, efficient digital detectors, the last several years have seen the successful acquisition of both high time and spectral resolution M-dwarf flare spectra. Recent programs have also been successfully conducted using the International Ultraviolet Explorer (IUE) satellite to obtain UV and EUV spectra of M-dwarf flares. These data reveal that dwarf M star flares are remarkably similar to solar flares in all aspects of their spectroscopic phenomenology.

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