Multiple Explanations for the Single Transit of KIC 5951458 Based on Radial Velocity Measurements Extracted with a Novel Matched-template Technique∗ [PDF]
The Astronomical Journal, 2020 Abstract Planetary systems that show single-transit events are a critical pathway to increasing the yield of long-period exoplanets from transit surveys. From the primary Kepler mission, KIC 5951458 b (Kepler-456b) was thought to be a single-transit giant planet with an orbital period of 1310 days.
Andrew W. Howard +5 more
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Radial velocity technique [PDF]
The precise Doppler method for measuring stellar radial velocities (RV) is a fundamental technique in modern astronomy. This method records a star's spectrum and detects periodic Doppler shifts in its spectral features, which indicate the gravitational influences induced by orbiting companions.
T. Trifonov
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A VERSATILE TECHNIQUE TO ENABLE SUB-MILLI-KELVIN INSTRUMENT STABILITY FOR PRECISE RADIAL VELOCITY MEASUREMENTS: TESTS WITH THE HABITABLE-ZONE PLANET FINDER* [PDF]
The Astrophysical Journal, 2016 ABSTRACT Insufficient instrument thermomechanical stability is one of the many roadblocks for achieving 10 cm s−1 Doppler radial velocity precision, the precision needed to detect Earth-twins orbiting solar-type stars. Highly temperature and pressure stabilized spectrographs allow us to better calibrate out instrumental drifts, thereby ...
Christian Schwab +18 more
openaire +6 more sources
, 2011 Discovering an Earth-like exoplanet in habitable zone is an important milestone for astronomers in search of extra-terrestrial life. While the radial velocity (RV) technique remains one the most powerful tools in detecting and characterizing exo-planetary sys- tems, we calculate the uncertainties in precision RV measurements considering stellar ...
Wang, Ji, Ge, Jian
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Simultaneous Measurement of Local Pulse Wave Velocities in Radial Arteries Using a Soft Sensor Based on the Fiber Bragg Grating Technique [PDF]
MicromachinesArterial stiffness has been proved to be an important parameter in the evaluation of cardiovascular diseases, and Pulse Wave Velocity (PWV) is a strong indicator of arterial stiffness. Compared to regional PWV (PWV among different arteries), local PWV (PWV within a single artery) outstands in providing higher precision in indicating arterial properties,
Jing Wang +11 more
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Statistical Methods for Exoplanet Detection with Radial Velocities [PDF]
Annual Review of Statistics and Its Application, 2022 Exoplanets can be detected with various observational techniques. Among them, the radial velocity (RV) has the key advantages of revealing the architecture of planetary systems and measuring orbital eccentricities and mass.
N. Hara, E. Ford
semanticscholar +1 more source
Precise dynamical masses of new directly imaged companions from combining relative astrometry, radial velocities, and Hipparcos-Gaia eDR3 accelerations [PDF]
Astronomy & Astrophysics, 2022 Aims. With an observing time span of more than 20 years, the CORALIE radial-velocity survey is able to detect long-term trends in data corresponding to companions with masses and separations accessible to direct imaging.
E. Rickman +9 more
semanticscholar +1 more source
An Extreme-precision Radial-velocity Pipeline: First Radial Velocities from EXPRES [PDF]
Astronomical Journal, 2020 The EXtreme-PREcision Spectrograph (EXPRES) is an environmentally stabilized, fiber-fed, R = 137,500, optical spectrograph. It was recently commissioned at the 4.3 m Lowell Discovery Telescope near Flagstaff, Arizona. The spectrograph was designed with a
R. R. Petersburg +15 more
semanticscholar +1 more source
Toward Extremely Precise Radial Velocities. II. A Tool for Using Multivariate Gaussian Processes to Model Stellar Activity [PDF]
Astrophysical Journal, 2020 The radial velocity method is one of the most successful techniques for the discovery and characterization of exoplanets. Modern spectrographs promise measurement precision of 0.2–0.5 m s−1 for an ideal target star.
C. Gilbertson +3 more
semanticscholar +1 more source