Sentences with phrase «velocity measurements»

The only feature being affected by the regulatory issue is the pulse wave velocity measurements.

However, no data on airflow velocity measurement or research on the influence of AC airflow have been available.

So velocity measurements help to group objects together but do not determine the distances for those groups.

The research team took a series of radial velocity measurements of Kapteyn's Star's light between May and December 2013 using the High Accuracy Radial Velocity Planet Searcher, or HARPS, a high - resolution spectrograph mounted on ESO's 3.6 - meter telescope at the La Silla Observatory in Chile, which clearly revealed the presence of two distinct signals, indicating the presence of two high - mass planets.

We also used radial velocity measurements of the host star, spanning a time range of $ \ sim $ 30 yr, to constrain the companion's mass and orbital properties, as well as to probe the host star's spectral age indicators and general spectral energy distribution.

Follow - up radial velocity measurements with th... ▽ More We present 44 days of high duty cycle, ultra precise photometry of the 13th magnitude star Kepler - 5 (KIC 8191672, Teff = 6300 K, logg = 4.1), which exhibits periodic transits with a depth of 0.7 %.

The planet has an orbital period of 1.486 days, and radial velocity measurements from the Hobby - Eberly Telescope (HET) show a Doppler signal of 420 + / -15 m.s - 1.

In July 2008, astronomers (Michael Endl and Martin Kürster) analyzed used seven years of differential radial velocity measurements for Proxima Centauri to submit a paper indicating that large planets are unlikely to be orbiting Sol's closest stellar neighbor within its habitable zone — around 0.022 to 0.054 AU with a corresponding orbital period of 3.6 to 13.8 days.

The paper is titled «Demonstration of a near - IR line - referenced electro - optical laser frequency comb for precision radial velocity measurements in astronomy.»

We used radial velocity measurements obtained with the echelle spectrograph ELODIE at the Observatoire de Haute Provence.

Vogt and Butler's team found the new planet by combining 119 star velocity measurements from HARPS with 122 measurements taken with a similar instrument called HIRES, which is mounted on the 10 - metre Keck 1 telescope in Hawaii.

Rotational velocity measurements made with the European Southern Observatory's Very Large Telescope (VLT) showed that the disk galaxy is spinning more than twice as fast as the Milky Way.

Laughlin says it's frustrating that the most interesting planets — small ones like Earth — are so challenging to detect: «You have to get tons and tons and tons of velocity measurements over many years, and then you really, really have to take extreme care — as this Tuomi et al. paper does — to get rid of all the systematic noise.»

Abstract: 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.

«Runoff, Precipitation, mass balance, and ice velocity measurements at South Cascade Glacier, Washington, 1993 balance year».

New distance measurements allow us to ascertain the three - dimensional positions of the satellite galaxies, which together with new velocity measurements, reveal their true nature as part of a gigantic rotating structure (side view: bottom left panel; front view: top right panel).

There must have been something wrong with Jackson's velocity measurements because there is no way he has the weakest arm of that bunch.

Fellow IoA astronomer Floor van Leeuwen agrees, adding that individual velocity measurements of the stars will resolve the question definitively, but probably not before 10 to 15 years from now, when new satellites take to the skies.

These two figures show the internal waves at Dongsha Island on April 23, 2010, as seen by the radar on TerraSAR - X in its conventional mode of operation (left) and in the experimental new mode that permits direct velocity measurements (right), with the measured surface velocities shown in color.

Pepe and his Geneva colleagues examined about 180 star velocity measurements collected by HARPS, a third more data than was available to Vogt and colleagues when they wrote their paper.

In order to figure out whether K2 - 18b was a scaled - up version of Earth (mostly rock), or a scaled - down version of Neptune (mostly gas), researchers had to first figure out the planet's mass, using radial velocity measurements taken with HARPS.

That could be caused by spots on the star, which could confuse velocity measurements, or by the star expanding and contracting (known as stellar pulsations).

Complimentary radial velocity measurements tell us their masses, which we can combine with their radii to calculate their bulk densities.

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.

Radial velocity measurements determine the sizes and shapes of the orbits of extrasolar planets as well as the lower limits of the masses of these planets.

It was discovered by J.B. Irwin in 1956, its membership was confirmed by radial velocity measurements conducted by M.W. Feast of Radcliffs Observatory (the common RV of the cluster members is +4 km / sec).

A study of ice discharge from the Amundsen Sea Embayment used ice - velocity measurements derived from Landsat and radar interferometry, and previously documented ice thickness to estimate the total discharge from 1973 to 2013.

Pulse wave velocity measurements have existed for a while in the medical field, and are generally viewed as a useful measure of arterial stiffness, along with other aspects of cardiac health like hypertension or high blood pressure.

Velocity measurements for the Prestrud and Sulzberger Ice Shelves, West Antarctica.

You have to get tons and tons and tons of velocity measurements over many years, and then you really, really have to take extreme care — as this Tuomi et al. paper does — to get rid of all the systematic noise.»

Demonstration of a Near - IR Laser Comb for Precision Radial Velocity Measurements in Astronomy

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.

It was found using radial - velocity measurements obtained as part of the the NASA - UC Eta - Earth Survey by the California Planet Search (CPS) group, a systematic search for low - mass planets between three and 30 Earth - masses orbiting the nearest 230 G -, K -.

Radial velocity measurements of Alpha Centauri B with High Accuracy Radial Velocity Planet Searcher spectrograph ruled out planets of more than 4 M ⊕ to the distance of the habitable zone of the star (orbital period P = 200 days).

Follow - up radial velocity measurements with the Keck HIRES spectrograph on 9 separate nights demonstrate that the planet is more than twice as massive as Jupiter with a mass of 2.114 + / -0.057 and a mean density of 0.894 + / -0.079 g / cm ^ 3.

If nothing is found wrong with this neutrino - velocity measurement, then of course the modern understanding of physics is thrown entirely «up in the air.»

Combining Kepler's initial transit observations with traditional radial velocity measurements, the scientists have been able to calculate that the two planets are just slightly less massive than Saturn.