Sentences with phrase «velocity measurements in»
This low - mass companion was discovered using radial velocity measurements in 1996, possibly confirming Louis Berman's discovery of a spectroscopic companion to Star B in 1931.
http://www.solstation.com/
The paper is titled «Demonstration of a near - IR line - referenced electro - optical laser frequency comb for precision radial velocity measurements in astronomy.»
Demonstration of a Near - IR Laser Comb for Precision Radial Velocity Measurements in Astronomy
Not exact matches
Measurement of Hydrodynamic Growth near Peak Velocity in an Inertial Confinement Fusion Capsule Implosion using a Self - Radiography Technique
Measurements of collective fuel velocities in deuterium - tritium exploding pusher and cryogenically layered deuterium - tritium implosions on the NIF
At one point Fizeau's measurement of the velocity of light in water seemed a conclusive refutation of the corpuscular theory of light; but the latter returned, in a new form, in Einstein's theory of photons.
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.»
As detailed in this video, Laniakea's discovery emerged from measurements of galactic positions and velocities that reveal how galaxies are moving in relation to concentrations of nearby matter and the universe's overall expansion.
Semantic Scholar tries to reveal what's «hot» in the field by measuring the «velocity» and «acceleration» of bodies of work, measurements of how rapidly others are citing certain work, and whether that is trending.
«If you really want to have a precise mass measurement of the black hole in a specific galaxy, you'd better use the slightly more cumbersome velocity dispersion method,» Ferrarese says.
In 1929 Edwin Hubble used these velocities and his own measurements of these galaxies» distances from Earth to deduce that the Universe is expanding.
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.
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.
Estimates of data like temperature and wind velocity also had to be used in some border areas, which were under control of FARC (the Revolutionary Armed Forces of Colombia) and were not easily accessible for measurements, he adds.
The research team, led by professor Kazuyo Tsuzuki, had the subjects sleep in two bedrooms set to the same temperature using ACs set at different airflow velocities, then made a comparison of the depth of sleep and body temperature control using electroencephalogram (EEG) measurements as well as subjective reporting by the subjects.
The researchers took measurements of small - scale temperature and velocity fluctuations, to measure the diapycnal movements in the Antarctic Circumpolar Current (ACC) across the Drake Passage region of the Southern Ocean.
«When the electron comes out, we measure its energy and velocity, and what we found is that electrons coming out of the cadmium arsenide had measurements that were similar to what is seen in particles that are massless,» Neupane said.
These seismic measurements enabled scientists to visualize these ultralow velocity zones in some regions along the core - mantle boundary, by observing the slowing down of seismic waves passing through them.
These velocity measurements led the Dutch astronomer Jan Oort in 1928 to propose that the Milky Way rotates.
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 Keck / DEIMOS combination is the only one in the world capable of making these velocity measurements for large numbers of Andromeda stars.»
Abstract: We report precise radial velocity (RV) measurements of WASP - 47, a G star that hosts three transiting planets in close proximity (a hot Jupiter, a super-Earth and a Neptune - sized planet) and a non-transiting planet at 1.4 AU.
For the super-Earth WA... ▽ More We report precise radial velocity (RV) measurements of WASP - 47, a G star that hosts three transiting planets in close proximity (a hot Jupiter, a super-Earth and a Neptune - sized planet) and a non-transiting planet at 1.4 AU.
The initial transit signal was identified in KELT - North survey data, and the planetary nature of the occulter was established using a combination of follow - up photometry, high - resolution imaging, high - resolution spectroscopy, and precise radial velocity measurements.
We measure eclipse timing variations (ETVs), which are then combined with the single - lined radial velocity measurements to yield masses in a manner equivalent to double - lined spectroscopic binaries.
As a subgiant star subject to pulsations which affect careful measurements of variations in radial velocity caused by the gravitational pull of substellar companions, astronomers would find it very difficult to detect any Earth - type planet around Beta Hydri using present methods.
We identified the initial transit signal in the KELT - North survey data and established the planetary nature of the companion through precise follow - up photometry, high - resolution spectroscopy, precise radial velocity measurements, and high - resolution adaptive optics imaging.
In to - tal, 148 high - quality radial - velocity measurements were obtained over two observing seasons.
We present new mass measurements of three of the planets in the Kepler - 20 system facilitated by 104 radial velocity measurements from the HARPS - N spectrograph and 30 archival Keck / HIRES observations, as well as an updated photometric analysis of the Kepler data and an asteroseismic analysis of the host star (MStar = 0.948 + -0.051 Msun and Rstar = 0.964 + -0.018 Rsun).
«Geodetic measurements of vertical crustal velocity in West Antarctica and the implications for ice mass balance.»
Preliminary Determination of Ice Flow Velocity in West Antarctica Using High Precision GPS Measurements, ION - 96 Proceedings, Kansas City, Missouri, September 17 - 20, 1996, 1853 - 1861.
Furthermore, by knowing the mass of a planet from radial velocity measurements and the radius of a planet based on how much starlight it blocked, it is a simple calculation to determine a planet's density, which can tell astronomers whether that planet is rocky or gaseous in nature, or whether it has a small core and a thick atmosphere, or whether it has a large core covered in deep oceans.
In the EDEN / RV component we are utilizing stellar reflex motion (radial velocity measurements) to search for extrasolar planets around nearby stars.
Putting the measurements together, the team determined the star is moving at about 1,200 kilometers per second — much higher than the velocities of previously known stars in the Milky Way galaxy.
We detected the transit light - curve signature in the course of the TrES multi-site transiting planet survey, and confirmed the planetary nature of the companion via multicolor photometry and precise radial velocity measurements.
Recently developed, in - situ techniques for direct volume determination, acoustic wave velocity measurements, and x-ray diffraction at HPCAT, along with molecular dynamics simulations, were employed to explore the nature of the unusual and pressure - tunable, compression and elastic properties.
The researchers took high - resolution mean and fluctuating velocity and density field measurements in an RM flow, which was shocked and reshocked, to understand production and dissipation in a two - fluid, developing turbulent flow field.
These involved calculating weights for the velocity time series from the measurement uncertainties and adjusting them in order to minimize the noise level of the combined data.
Optical fiber modal noise in the 0.8 to 1.5 micron region and implications for near infrared precision radial velocity measurements
We find that the asteroseismic parameters allow us to test cluster - membership of the stars, and even with the limited seismic data in hand, we can already identify four possible non-members despite their having a better than 80 % membership probability from radial velocity measurements.
By contrast, Hubble's measurements are based on the velocities of stars whirling around in the dense cores of globular clusters, which yield a direct measurement of the black hole masses.
In addition, Tau Ceti does not appear to have a close stellar or substellar companion based on astrometric measurements (Lippincott and Worth, 1980), radial velocity variations (Campbell et al, 1988; and near - infrared interferometry (Di Folco et al, 2007).
Misalignments in a broader class of systems had been predicted as a consequence of torques from wide - orbiting companions, and indeed radial - velocity measurements revealed a third companion in a wide orbit in the Kepler - 56 system.
Kepler 10b was detected using the transit method from more than eight months of data collected by the spacecraft between May 2009 and early January 2010 and confirmed by radial velocity measurements, and there evidence for another planet (KOI 72.02) in an outer orbit with a period around 45.3 days (Kepler news release; images, animations, and discovery page; and Batalha et al, 2011).
No hints for the presence of an additional planetary companion in the two systems were found either from the photometric or radial velocity measurements.
This gave them 25 small planets in 12 star systems from radial velocity measurements.
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).
It can be simply measured using dynamometry by taking multiple measurements in the same dynamometer of the same joint angle movement, at different angular velocities.
When different studies use the same angular velocity for measurement, these can be compared to one another, so long as differences between the populations tested are acknowledged, and so long as the dynamometer used is the same in both cases, as differences have been observed between brands (Francis & Hoobler, 1987; Thompson et al. 1989; Gross et al. 1991).
I can determine the standard uncertainty for all the measured variables from statistics It is falsifiable — i can move a body at a certain velocity for a certain time and measure the traveled distance If the traveled distance does not fit with calculated distance within the uncertainty calculated by using the international standard Guide to the expression of Uncertainty in Measurement the model might be wrong.