The Texas High-Precision Radial-velocity Programs
نویسندگان
چکیده
منابع مشابه
The Radial Velocity Precision of Fiber-fed Spectrographs
We have measured the radial velocities of five 51 Peg-type stars and one star known to be constant in velocity. Our measurements, on 20 Å centered at 3947 Å, were conventional using Th/Ar comparison spectra taken every 20 or 40 minutes between the stellar exposures. Existing IRAF routines were used for the reduction. We find σRV ≤ 20 m s−1, provided 4 measurements (out of 72) with residuals > 5...
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The reflex motion of a star induced by a planetary companion is too small to detect by photographic astrometry. The apparent discovery in the 1960s of planetary systems around certain nearby stars, in particular Barnard’s star, turned out to be spurious. Conventional stellar radial velocities determined from photographic spectra at that time were also too inaccurate to detect the expected refle...
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Exploring the use of single-mode fibers (SMFs) in high precision Doppler spectrometers has become increasingly attractive since the advent of diffraction-limited adaptive optics systems on largeaperture telescopes. Spectrometers fed with these fibers can be made significantly smaller than typical ‘seeing-limited’ instruments, greatly reducing cost and overall complexity. Importantly, classical ...
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High precision radial velocity (RV) measurements in the near infrared are on high demand, especially in the context of exoplanet search campaigns shifting their interest to late type stars in order to detect planets with ever lower mass or targeting embedded pre-main-sequence objects. ESO is offering a new spectrograph at the VLT – CRIRES – designed for high resolution near-infrared spectroscop...
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: International Astronomical Union Colloquium
سال: 1999
ISSN: 0252-9211
DOI: 10.1017/s0252921100048454