The search for rocky exoplanets plays an important role in our quest for
extra-terrestrial life. Here, we discuss the extreme physical properties
possible for the first characterized rocky super-Earth, CoRoT-7b (R_pl = 1.58
\pm 0.10 R_Earth, Mpl = 6.9 \pm 1.2 M_Earth). It is extremely close to its star
(a = 0.0171 AU = 4.48 R_st), with its spin and orbital rotation likely
synchronized. The comparison of its location in the (Mpl, Rpl) plane with the
predictions of planetary models for different compositions points to an
Earth-like composition, even if the error bars of the measured quantities and
the partial degeneracy of the models prevent a definitive conclusion. The
proximity to its star provides an additional constraint on the model. It
implies a high extreme-UV flux and particle wind, and the corresponding
efficient erosion of the planetary atmosphere especially for volatile species
including water. Consequently, we make the working hypothesis that the planet
is rocky with no volatiles in its atmosphere, and derive the physical
properties that result. As a consequence, the atmosphere is made of rocky
vapours with a very low pressure (P \leq 1.5 Pa), no cloud can be sustained,
and no thermalisation of the planetary is expected. The dayside is very hot
(2474 \leq 71 K at the sub-stellar point) while the nightside is very cold (50
to 75 K). The sub-stellar point is as hot as the tungsten filament of an
incandescent bulb, resulting in the melting and distillation of silicate rocks
and the formation of a lava ocean. These possible features of CoRoT-7b could be
common to many small and hot planets, including the recently discovered
Kepler-10b. They define a new class of objects that we propose to name
"Lava-ocean planets"
Abstract. New data on the periods of Ap stars with references are presented. 161 further stars are introduced for which a periodic variability has recently been discovered or it was known before but it was not reported in previous issues of this catalogue. For many stars also present in previous issues of the catalogue new determinations of the periods are given. Recently attributed variable star names are also quoted.
ADPN is markedly increased in patients with nephrotic syndrome, and proteinuria is strongly related to circulating ADPN in patients with nephrotic and non-nephrotic renal diseases. The relationships between plasma ADPN, serum cholesterol, and serum albumin suggest that this adipocyte protein may serve to mitigate endothelial damage triggered by dyslipidemia and other risk factors in patients with chronic renal diseases.
This study demonstrates that the proposed prognostic score, which is easily obtained after emergency endoscopy, is useful in clinical practice because it can identify patients with different levels of rebleeding risk. It can be helpful in patient management and decision making for discharge.
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