Sentences with phrase «velocity variations of»

Due to the close binary orbital interactions of the host star with Alpha Centauri A and Star B's own increased stellar activity during recent years, the astronomers were only able to detect the radial - velocity variations of host star B that were caused by the 3.236 - day orbit of the planet (with a semi-major axis of 0.04 AU) only after more than three years of careful observation.

Due to the close binary orbital interactions of the host star with Alpha Centauri A and Star B's own increased stellar activity during recent years, the astronomers were only able to detect the radial - velocity variations of host star B that were caused by the 3.236 - day orbit of the planet (with a semi-major axis of 0.04 AU) only after more than four and a half years of careful observation.

[1] Most of the exoplanets currently known were discovered using indirect techniques — such as radial velocity variations of the host star, or the dip in brightness of the star caused by a transiting exoplanet.

Not exact matches

This includes low momentum diffusion, high momentum convection, and rapid variation of pressure and velocity in space and time.

The planet was found with the radial velocity method, a planet - hunting technique that relies upon slight variations in the velocity of a star to determine the gravitational pull exerted by nearby planets that are too faint to observe directly with a telescope.

Because we can not sample the deep Earth, we must deduce its composition either by looking at the clues hidden in igneous and metamorphic rocks, or by examining proxies for composition and structure such as the three - dimensional variation of the velocity of seismic waves produced by earthquakes and sampled by networks of seismometers on the surface.

These options and their more exotic variations theoretically offer velocities that are a significant fraction of the speed of light.

The radial - velocity variations indicate a highly eccentric orbit with a period of 153.9 days.

Scientists can also measure tiny variations in the velocity of the spacecraft, as accurate as only one foot (0.3 meters) per hour, by using NASA's Deep Space Network (DSN) to track the radio signal coming from Dawn.

I. Performances of radial velocity measurements, first analyses of variations.

On March 25, 2015, a team of astronomers using the Hubble Space Telescope revealed observations which indicate via the transit method that Alpha Centauri B may have a second planet «c» in a hot inner orbit, just outside planet candidate «b.» After observing Alpha Centauri B in 2013 and 2014 for a total of 40 hours, the team failed to detect any transits involving planet b (previously detected using the radial velocity variations method and recently determined not to be observed edge - on in a transit orbit around Star B).

Prior to 2009, small but significant variations in radial velocity had been detected which may have been caused by a substellar companion of one to nine Jupiter - masses with an orbital period of 50 years of less (Campbell et al, 1988, pages 904, 906, and 919).

The transit signals were detected in photometric data from the Kepler satellite, and were confirmed to arise from planets using a combination of large transit - timing variations, radial - velocity variations, Warm - Spitzer observations, and statistical analysis of false - positive probabilities.

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.

Kepler - 19 joins the small number of systems that reconcile transit timing variation and radial velocity measurements.

Kepler 18 - b, c, and d: A System Of Three Planets Confirmed by Transit Timing Variations, Lightcurve Validation, Spitzer Photometry and Radial Velocity Measurements

Herman, F., Anderson, B. & Leprince, S. Mountain glacier velocity variation during a retreat / advance cycle quantified using sub-pixel analysis of ASTER images.

Radial velocity observations from observing runs in 2000 and 2004 reveal a periodic variation of 3.30 ± 0.02 d, which is consistent with the previously determined value of 3.3125 ± 0.0002 d.

If you are new to this saga make sure you read Tau II Abstract: The successful detection is reported of radial - velocity variations due to orbital motion of the substellar companion of the star tau Boötis, from data obtained with a small aperture (0.4 - m) telescope and a fibre - fed high resolution spectrograph.

The primary shows long - period radial velocity variations that indicate the presence of a low mass companion whose projected mass is in the planetary regime (m sin i = 9.33 Mjup).

However, the high luminosity of the primary star, intense Ca II H and K emission (Smith and Dominy, 1979), and radial velocity variations somewhat larger than can be accounted for by the expected uncertainties suggested that Delta Eridani might be an RS CVn - type binary and therefore a photometric variable like most members of that class.

According to the Yale Bright Star Catalogue, 1991 5th Revised Edition notes entry for HR 4983, analysis of spectroscopy and velocity variations over at least five years initially suggested that Beta Comae Berenices may have an unseen companion, which was unresolved by speckle interferometry (Hartkopf and McAlister, 1984, page 109).

Analysis of radial velocity variations suggest that this probable red dwarf star has about 15 percent of Sol's mass (Irwin et al, 1992).

As CORVAL monitoring failed to detect significant radial velocity variations over period of 3,400 days — or over 9.3 years (Duquennoy and Mayor, 1991, pp. 492 and 506), the detection is now considered to be spurious.

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.

In the case of Edasich, however, the high orbital eccentricity of its companion made its motion distinguishable from stellar pulsation as the cause of the observed velocity variations.

In 1988, Campbell et al also reported finding small velocity variations that could be the result of a substellar object of one to nine times the mass of Jupiter that may orbit Xi Boötis B.

Arcturus exhibits both short - and long - period Doppler velocity variations with amplitudes of order 150 meters (492 feet) per second (Hatzes and Cochran, 1994 and 1993).

We also find a slow variation in the radial velocity of Procyon, with good agreement between different telescopes.

Variations in rotational velocity should indicate regions of varying gravity and therefore mass.

Scientists were also able use the infrared spectroscopy to look at radial velocity variations (an analysis of the light spectrum) to determine that water was present.

# 3 Lifting: Snatch and snatch variation — hang snatch, power snatch, snatch pulls and high pulls — seem to provide a better chance of increasing peak vertical bar velocity, a distinctive feature that ultimately reflects the ability to generate and apply force over a longer period of time (special strength training).

These are normally triple extension or multi-joint upper body exercises that are found on the strength - speed, power, and speed - strength portion of the force velocity curve: Olympic lifting variations, jump squats, bench press throws, trap bar jumps, kettle bell swings and snatches.

These variations are characterized by their function within the muscle, namely the velocity of contraction they produce.

For these trying to play the definitive variations of previous video games, you'll be able to slash and shoot via the Devil May Cry HD Collection or velocity round Burnout Paradise City Remastered.

His photorealist paintings depict the moving train's blur, precisely painted with a mixture of acrylic and oil, conveying the velocity and movement of his subjects while also showing subtle variations in texture and saturation.

Ocean currents sometimes mix and sometimes stratify the signals from different parts of the oceans, but since they, too, can change with season, with wind direction and velocity, and with changes in THC / MOC, they also create variations in SST.

This leads to the following chain of causes and effects: decreased mass variations reduce the numerically induced alternating patterns in the horizontal velocity components, which reduce erroneous vertical mass fluxes, which reduce erroneous precipitation.

We have found notable oscillations in the acceleration of rotation velocity (rate of variations in the maximum wind velocity), which are most pronounced in the...

The importance of variations in the thermohaline circulation has been stressed by other recent research that shows a temporary decline in Gulf Stream velocities may be the main culprit behind the Little Ice Age.

A number of publications suggest that seasonal, inter-seasonal and inter-annual variations of the earth's rotation velocity are directly proportional to the relative angular momentum at the atmosphere, which primarily depends on the velocity of zonal winds (Langley et al. 1981; Rosen and Salstein 1983; Robertson 1991).

«The decadal «noise» involves coupled variations in the distributions of temperature, mass, and velocity (21, 22) and so is manifested in the steric sea level, moments of inertia, and the Earth's variable rotation.»

Your cell phone will execute better on next variations of Asphalt or Want for Velocity and extra.

Your cell phone will originate higher on next variations of Asphalt or Need for Velocity and extra.

Your cell phone will originate greater on subsequent variations of Asphalt or Need for Velocity and extra.