Sentences with phrase «precision radial»
An efficient, compact, and versatile fiber double scrambler for high precision radial velocity instruments
https://arxiv.org/
Optical fiber modal noise in the 0.8 to 1.5 micron region and implications for near infrared precision radial velocity measurements
This is an increasingly pressing problem for precision radial velocity (RV) spectrographs in the near - infrared (NIR) and optical that require both high stability of the observed line profiles and high signal to noise.
The paper is titled «Demonstration of a near - IR line - referenced electro - optical laser frequency comb for precision radial velocity measurements in astronomy.»
Modal noise become significantly more important as the wavelength increases and presents a risk to the new generation of near - infrared precision radial spectrographs under construction or being proposed to search for planets around cool M - dwarf stars, which emit most of their light in the NIR.
Abstract: We present the design concept of the wavelength calibration system for the Habitable - zone Planet Finder instrument (HPF), a precision radial velocity (RV) spectrograph designed to detect terrestrial - mass planets around M - dwarfs.
High - precision radial - velocity measurements confirm a sinusoidal variation with the period and phase predicted by the photometry, and rule out the presence of line - bisector variations that would indicate that the spectroscopic orbit is spurious.
Such monolithic interferometers will make it possible to build relatively inexpensive instruments that are easy to operate and capable of precision radial velocity measurements.
«Paul Butler and I have been obtaining precision radial velocity data of Kapteyn's star for over a decade at Keck, and were thus heavily invested in this work,» said Steve Vogt, a professor of astronomy at the University of California, Santa Cruz that contributed the data from Keck Observatory.
When we first embarked on this project we were told unequivocally that precision radial velocity measurements were impossible at the amateur level and required the funding and resources of an institution.
The planets are amenable to mass measurement by precision radial velocity measurements, and therefore K2 - 138 could represent a new benchmark systems for comparing radial velocity and TTV masses.
We derived the radii of the planets from the K2 light curve and used high - precision radial velocities gathered with the HARPS - N spectrograph for mass measurements.
KELT - 8b: A highly inflated transiting hot Jupiter and a new technique for extracting high - precision radial velocities from noisy spectra
Not exact matches
These new results have been obtained from analysing data from two high - precision planet surveys — the HARPS (High Accuracy Radial Velocity Planet Searcher) and UVES (Ultraviolet and Visual Echelle Spectrograph)-- both operated by the European Southern Observatory in Chile.
As part of a large survey of possible planet - hosting stars, Lovis and his colleagues used the powerful HARPS (for High Accuracy Radial - Velocity Planet Searcher) spectrograph at La Silla Observatory in Chile, 2,400 meters above sea level, which can detect stellar motions with precisions of less than one meter per second, roughly the walking speed of a human being.
This technology, when coupled with a high spectral resolution spectrograph, offers the promise of $ < $ 1 m / s radial velocity precision suitable for the detection of Earth - sized planets in the habitable zones of cool M - type stars.
Our barycentric radial velocities, derived from observations taken at the KPNO 2.1 meter telescope, differ from... ▽ More We demonstrate the ability to measure precise stellar barycentric radial velocities with the dispersed fixed - delay interferometer technique using the Exoplanet Tracker (ET), an instrument primarily designed for precision differential Doppler velocity measurements using this technique.
Here we present a cautionary note outlining how the polarization properties of SMFs can affect the radial velocity measurement precision of high resolution spectrographs.
This temperature stability is comparable to the best stability demonstrated for Doppler spectrometers currently achieving 1 m s $ ^ -LCB--1 -RCB- $ radial velocity precision.
Highly temperature and pressure stabilized spectrographs allow us to better calibrate out instrumental drifts, thereby helping in distinguishing instrumental noise from astrophysical stel... ▽ More Insufficient instrument thermo - mechanical stability is one of the many roadblocks for achieving 10cm / s Doppler radial velocity (RV) precision, the precision needed to detect Earth - twins orbiting Solar - type stars.
The ECS presented here could potentially provide the stable operating environment required for future compact, «astro - photonic» precise radial velocity (PRV) spectrometers to achieve high Doppler measurement precision with a modest budget.
Significantly, the researchers say they have improved the precision of the radial velocity method to arrive at these revised estimates.
By re-observing the photometric transit, we attempt to determine the transit parameters to high precision, and, by spectroscopic observations, to estimate the properties of the host star and determine the mass of the transiting object by means of radial - velocity measurements.
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