Artist’s concept of a giant extrasolar planet. Credit: NASA/JPL-Caltech.
The giant planets have masses from 2.4 to 5.5 the mass of Jupiter and have very long orbital periods ranging from nearly 2 to slightly more than 4 Earth years. The team, led by Matias Jones of the Pontifical Catholic University of Chile, made the discovery during observations under the EXPRESS (EXoPlanets aRound Evolved StarS) radial velocity program. They used 2 telescopes located in the Atacama desert in Chile: the 1.5 m telescope at the Cerro Tololo Inter-American Observatory and the 2.2 m telescope at La Silla observatory. Complementary observations were conducted at the 3.9 m Anglo-Australian telescope in Australia.
Using spectrographs mounted on these telescopes, the researchers were monitoring a sample of 166 b...
Read More![The value of the Hubble rate at the start of reheating that gives the correct relic abundance, as a function of the mass of the PIDM. The blue curve is for γ=1 , the orange curve is for γ=0.1 , and the green curve is for γ=0.01 . The red region is excluded from the current bound on the tensor-to-scalar ratio, and the purple dashed line is the projected sensitivity for next generation CMB experiments, from Ref. [24]. The dotted lines show the modification when taking also gravitational production into account [12, 13, 14]. The dashed-dotted line marks mX=Hi , and for a scalar PIDM the left-hand side of this line is excluded unless corrections to the PIDM potential are important during inflation. All values are given in units of Mp .](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAfQAAAFiAQAAAAAokhd5AAAAAnRSTlMAAHaTzTgAAAAsSURBVHja7cEBDQAAAMKg909tDwcUAAAAAAAAAAAAAAAAAAAAAAAAAAAA8GZYgAABKPAtIQAAAABJRU5ErkJggg==)
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