Results 11 to 20 of about 10,175 (216)
Astronomy & Astrophysics, 2022 Context.Active regions on the photosphere of a star have been the major obstacle for detecting Earth-like exoplanets using the radial velocity (RV) method. A commonly employed solution for addressing stellar activity is to assume a linear relationship between the RV observations and the activity indicators along the entire time series, and then remove ...
Simola, U. +5 more
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Detecting planets around very cool dwarfs at near infrared wavelengths with the radial velocity technique [PDF]
Astronomy & Astrophysics, 2011 Context. Radial velocity monitoring of very cool dwarfs such as late M- and hot L-dwarfs has become a promising tool to search for rocky planets as well as to follow-up planetary candidates around dwarfs found by transit surveys. These stars are faint at optical wavelengths, as their spectral flux distribution peaks at near-infrared (NIR) wavelengths ...
F. Rodler +7 more
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Detection of Planetary and Stellar Companions to Neighboring Stars via a Combination of Radial Velocity and Direct Imaging Techniques [PDF]
The Astronomical Journal, 2019 Abstract The sensitivities of radial velocity (RV) surveys for exoplanet detection are extending to increasingly longer orbital periods, where companions with periods of several years are now being regularly discovered. Companions with orbital periods that exceed the duration of the survey manifest in the data as an incomplete orbit or ...
Stephen R. Kane +15 more
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Search for planets around young stars with the radial velocity technique [PDF]
, 2010 Giant planets form in circumstellar disks around young stars. Two alternative theoretical formation concepts, disk instability and core accretion, may both apply under certain conditions, but core accretion is believed to be the main mechanism. No observational proof of the dominant process has been found thus far. Therefore, this thesis aims to detect
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FM stars: a Fourier view of pulsating binary stars, a new technique for measuring radial velocities photometrically [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 Some pulsating stars are good clocks. When they are found in binary stars, the frequencies of their luminosity variations are modulated by the Doppler effect caused by orbital motion. For each pulsation frequency this manifests itself as a multiplet separated by the orbital frequency in the Fourier transform of the light curve of the star.
Shibahashi, Hiromoto, Kurtz, Donald W.
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Development of Iodine Cells for Subaru HDS and Okayama HIDES. III. An Improvement on the Radial-Velocity Measurement Technique [PDF]
Publications of the Astronomical Society of Japan, 2008 Abstract An improvement of the radial-velocity measurement accuracy is crucial for the detection of tiny stellar oscillations and exoplanets. Through the analysis of week-long extensive observations of solar-type stars (Procyon in 2000, 2002, and 2006/2007 and $\tau$ Cet in 2002 and 2006/2007), we have carefully examined, revised, and ...
Kambe, Eiji +16 more
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Investigating transcription factor dynamics in health and disease using FRAP
FEBS Letters, EarlyView.FRAP analysis of GFP‐tagged transcription factors reveals how molecular mobility and target engagement change in response to drug treatment. By combining live‐cell imaging, quantitative model fitting, and statistical analysis, this approach uncovers transcription factor dynamics linked to disease mechanisms, providing a powerful framework for ...
Kannan Govindaraj +3 more
wiley +1 more source
Search for Large Radial Velocities in Direction of NGP Using the Fehrenbach Techniques [PDF]
Highlights of Astronomy, 1977 The Observatory of Strasbourg will participate in the future in the general radial velocity survey which is in hand at the Observatories of Haute-Provence and of Marseille with FEHRENBACH’s Objective-prism astrograph. A programme of this type, providing a large number of data, is particularly suitable at the place where the “Data Center” is growing up ...
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Optimizing photoexcitation conditions for time‐resolved X‐ray solution scattering experiments
FEBS Open Bio, EarlyView.Time‐resolved X‐ray solution scattering (TR‐XSS) is a powerful technique to visualize how proteins change their structure in real time after light activation. Selecting the right laser photoexcitation conditions—fluence, excitation geometry, and sample refresh rate—is critical to maximize the experimental signal while avoiding unwanted side effects ...
Matteo Levantino
wiley +1 more source
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.
Paul A. Dalba +4 more
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