منابع مشابه
Properties of Sun-like Stars with Planets
Planets have been reported orbiting the Sun-like stars 1 Cnc, Boo o, and And based on low-amplitude radial velocity variations. We have derived 1 Based on observations made at Mount Wilson Observatory, operated by the Mount Wilson Institute under an agreement with the Carnegie Institution of Washington. information on the rst two stars from analysis of spectra, as well as parallel records of hi...
متن کاملDetecting transits from Earth-sized planets around Sun-like stars
Context. Detecting regular dips in the light curve of a star is an easy way to detect the presence of an orbiting planet. CoRoT is a Franco-European mission launched at the end of 2006, and one of its main objectives is to detect planetary systems using the transit method. Aims. In this paper, we present a new method for transit detection and determine the smallest detected planetary radius, as...
متن کاملProperties of Sun - like Stars with Planets 1
Radial velocity variations have revealed planets orbiting 51 Peg, 47 UMa, and 70 Vir, and a low-mass companion orbiting HD 114762. We analyze parallel records of photometric measurements and Ca II H and K uxes in those stars. In the case of 51 Peg, the high precision of the diierential photometric measurements made by the 0.75m Automatic Photoelectric Telescope and the nonvariability of the sta...
متن کاملWhat Fraction of Sun-like Stars Have Planets?
The radial velocities of 1800 nearby Sun-like stars are currently being monitored by eight high-sensitivity Doppler exoplanet surveys. Approximately 90 of these stars have been found to host exoplanets massive enough to be detectable. Thus, at least 5% of target stars possess planets. If we limit our analysis to target stars that have been monitored the longest ( 15 years), 11% possess planets....
متن کاملSpectral fingerprints of Earth-like planets around FGK stars.
We present model atmospheres for an Earth-like planet orbiting the entire grid of main sequence FGK stars with effective temperatures ranging from Teff=4250 K to Teff=7000 K in 250 K intervals. We have modeled the remotely detectable spectra of Earth-like planets for clear and cloudy atmospheres at the 1 AU equivalent distance from the VIS to IR (0.4 to 20 μm) to compare detectability of featur...
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ژورنال
عنوان ژورنال: Nature
سال: 2004
ISSN: 0028-0836,1476-4679
DOI: 10.1038/430509a