Sentences with phrase «radial velocity measurements»

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

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.

The host star is bright (V = 11.2, J = 9.1) and so may be a good target for precise radial velocity measurements.

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 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.

For low - mass eclipsing binary stars, the method of eclipse minimum timing allows astronomers to search for smaller masses than those feasible with 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).

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.

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

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.

Initially identified a decade ago through radial velocity measurements, it was later confirmed through transit observations with the MOST and Spitzer space telescopes.

The study, led by Christophe Lovis of the Observatory of Geneva, relies on a type of observation called radial velocity measurements, which track Doppler shifts in a star's light spectrum as it moves closer to or farther away from an observer.

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.

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

Still, many of the nearby planets are detectable via three exoplanet hunting methods: planetary transits, high - contrast imaging, and stellar radial velocity measurements.

The new radial velocity measurements are now available for download on our website.

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.

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.

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

Such monolithic interferometers will make it possible to build relatively inexpensive instruments that are easy to operate and capable of precision radial velocity measurements.

These observations explore the minimum system requirements for precise radial velocity measurements.

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.

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).

An Inexpensive Field - Widened Monolithic Michelson Interferometer for Precision Radial Velocity Measurements

Radial velocity measurements suggest that HD 147513 has a companion «b» (or «A1») with at least 1.0 times Jupiter's mass.

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.

Older calculations indicating that the Wolf 424 system would get as close to the Solar System as 0.95 light - years within around 7,500 years have been determined to be based on a «probably erroneous» radial velocity measurement (Vadim V. Bobylev, 2010; and Mülläri and Orlov, 1996).

It was only in 2017 that a paper by Kervella, et al., showed that, based on high precision radial velocity measurements and with a high degree of confidence, Proxima and Alpha Centauri are in fact gravitationally bound.

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.

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).

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.

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 %.

Radial velocity measurements from the Keck HIRES spectrograph show a reflex Doppler signal of 9.

In the EDEN / RV component we are utilizing stellar reflex motion (radial velocity measurements) to search for extrasolar planets around nearby stars.

Radial velocity measurements from the Keck HIRES spectrograph show a reflex Doppler signal of 9.3 (+1.1 -1.9) m / s, consistent with a low - eccentricity orbit with the phase expected from the transits.

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.

Using the proper motion and radial velocity measurements, they were able to reconstruct how these stars move in three dimensions — the first time this was done for a dwarf 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.