منابع مشابه
On the Eccentricity Distribution of Exoplanets from Radial Velocity Surveys
We investigate the estimation of orbital parameters by least-χ2 Keplerian fits to radial velocity (RV) data using synthetic data sets. We find that while the fitted period is fairly accurate, the best-fit eccentricity and Mp sin i are systematically biased upward from the true values for low signal-to-noise ratio K/σ . 3 and moderate number of observations Nobs . 60, leading to a suppression of...
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Within the past couple of years, our technology has become so precise that we have been able to unveil terrestrial planets inhabiting outside solar systems. Though we are currently unable to detect planets with Earth-like orbital properties, we can nonetheless contemplate what we might discover in the next few years. Utilizing the known distribution of extrasolar planets today and a variable me...
متن کاملSearch for exoplanets with the radial-velocity technique: quantitative diagnostics of stellar activity
Aims. It is known that stellar activity may complicate the analysis of high-precision radial-velocity spectroscopic data when looking for exoplanets signatures. We aim at quantifying the impact of stellar spots on stars with various spectral types and rotational velocities and comparing the simulations with data obtained with the HARPS spectrograph. Methods. We have developed detailed simulatio...
متن کاملRadial velocity follow-up for confirmation and characterization of transiting exoplanets
Radial Velocity follow-up is essential to establish or exclude the planetary nature of a transiting companion as well as to accurately determine its mass. Here we present some elements of an efficient Doppler follow-up strategy, based on high-resolution spectroscopy, devoted to the characterization of transiting candidates. Some aspects and results of the radial velocity followup of the CoRoT s...
متن کاملRadial Velocity
The radial velocity technique was utilized to make the first exoplanet discoveries and continues to play a major role in the discovery and characterization of exoplanetary systems. In this chapter we describe how the technique works, and the current precision and limitations. We then review its major successes in the field of exoplanets. With more than 250 planet detections, it is the most prol...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2015
ISSN: 1538-4357
DOI: 10.1088/0004-637x/805/2/188