Sentences with phrase «radial 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.
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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
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.
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).
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.
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.
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.
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).