Sentences with phrase «by planetary transits»

To avoid being fooled, Kepler must be able to distinguish between natural variations in a star's light and the dimming caused by planetary transits.

Not exact matches

In particular, they are looking at the planet as it transits, seeking a telltale broadening of its planetary shadow due to starlight being absorbed by a hydrogen - rich atmosphere.

This was borne out by his first voyage in 1768 on the Endeavour with James Cook, who was to observe the transit of Venus across the face of the Sun from the southern hemisphere to help to calculate planetary distances, while Banks collected biological specimens, the first from the South Pacific to be seen in England.

The Vespa technique works by comparing the details of a transiting planet signal — specifically its duration, depth and shape — against simulated planetary and false positive signals to indicate the type of signal the candidate most likely is.

To confirm that the transits of COROT 9 b recorded in 2008 by the COROT satellite were indeed planetary, the researchers first took two follow - up readings of the star using a spectrograph in France, a rough sketch that was consistent with the presence of a planet.

Several Detection Teams» studied CoRoT light - curves for planetary transits, also finding by coincidence a large number of EBs.

«You can see that this is an indirect method,» Maciejewski says, acknowledging that others have claimed planetary detections by transit timing in the past, only to have other astronomers rule out the purported finds.

The transit zone is rich in host stars for planetary systems, offering approximately 100,000 potential targets, each potentially orbited by habitable planets and moons, the scientists say — and that's just the number we can see with today's radio telescope technologies.

Coming hot off the heels of discoveries made by other observatories, including NASA's Kepler and CoRot (the Convection, Rotation, and Planetary Transits mission, led by France's CNES with contributions from the ESA), this spacecraft is intended to build significantly on our knowledge of the universe, the Solar System, and the formation of life in general.

The expected Doppler signals are too small to confirm them by demonstrating that their masses are in the planetary regi... ▽ More We present an investigation of twelve candidate transiting planets from Kepler with orbital periods ranging from 34 to 207 days, selected from initial indications that they are small and potentially in the habitable zone (HZ) of their parent stars.

This observational result, which uses the achromatic property of planetary transit signals that is not investigated by the Kepler observations, provides an independent indication that Kepler's false positive rate is low.

For Kepler - 20c and Kepler - 20d, the blend scenario is independently disfavored by the achromaticity of the transit: From Spitzer data gathered at 4.5 um, we infer a ratio of the planetary to stellar radii of 0.075 + -0.015 (Kepler - 20c) and 0.065 + -0.011 (Kepler - 20d), consistent with each of the depths measured in the Kepler optical bandpass.

A third mission, called PLATO (PLAnetary Transits and Oscillations of stars), proposed using a number of small, optically fast, wide - field telescopes to detect and characterize a large number of close - by exoplanetary systems.

The dilution of the host star's light by the nearly equal magnitude stellar companion (~ 0.5 magnitudes fainter) significantly affects the derived planetary parameters, and if left uncorrected, leads to an underestimate of the radius and mass of the planet by 10 %... ▽ More We present the discovery of a hot Jupiter transiting an F star in a close visual (0.3» sky projected angular separation) binary system.

«This new planetary system presents various peculiarities which make it extraordinarily interesting, e.g., it was detected by the Kepler spatial observatory through the planetary transit method (occultations similar to eclipses)», Barrado details.

Follow - up observations of planetary candidates identified by detection of transit - like events are needed both for identification of astrophysical phenomena that mimic planetary transits and for characterization of the... ▽ More The Kepler Mission was launched on March 6, 2009 to perform a photometric survey of more than 100,000 dwarf stars to search for terrestrial - size planets with the transit technique.

Follow - up observations of planetary candidates identified by detection of transit - like events are needed both for identification of astrophysical phenomena that mimic planetary transits and for characterization of the true planets and planetary systems found by Kepler.

Abstract: Based on more than four weeks of continuous high cadence photometric monitoring of several hundred members of the young cluster NGC 2264 with two space telescopes, NASA's Spitzer and the CNES CoRoT (Convection, Rotation, and planetary Transits), we provide high quality, multi-wavelength light curves for young stellar objects (YSOs) whose optical variability is dominated by short duration flux burs... ▽ More Based on more than four weeks of continuous high cadence photometric monitoring of several hundred members of the young cluster NGC 2264 with two space telescopes, NASA's Spitzer and the CNES CoRoT (Convection, Rotation, and planetary Transits), we provide high quality, multi-wavelength light curves for young stellar objects (YSOs) whose optical variability is dominated by short duration flux bursts, which we infer are due to enhanced mass accretion rates.

Giant transiting exoplanets are easily mimicked by false positives, so spectroscopic follow - up observations are needed to establish the planetary nature of the transit detections, and easily reveal blended multiple stellar systems.

We report on the results from the radial - velocity follow - up program performed to establish the planetary nature and to characterize the transiting candidates discovered by the space mission CoRoT.