= Didier Queloz
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{wiki}
= D. Queloz
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{synonym}
<Didier Queloz> and <Michel Mayor> detected a planetary companion to the solar-type <star> <51 Pegasi> through periodic changes in its <radial velocity>. Their 1995 observations used the <ELODIE spectrograph> to measure the stellar <Doppler shift>.
The signal repeated in about four days, implying a close companion rather than a distant analogue of <Jupiter>. The inferred minimum companion <mass> was planetary. Because <radial velocity> measures only the line-of-sight component of the reflex <motion>, the <orbital inclination> remains part of the <mass> inference.<A Jupiter-mass companion to a solar-type star by Michel Mayor and Didier Queloz>[pp. 355–359: periodic radial velocities, short-period solution and companion interpretation]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Queloz%20profile.jpg?width=250]
{title=Portrait of <Didier Queloz>}
{description=Astrofisch66 (own work). https://creativecommons.org/licenses/by-sa/4.0/[CC BY-SA 4.0], via Wikimedia Commons.}
{source=https://commons.wikimedia.org/wiki/File:Queloz_profile.jpg}
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