Image © NASA, ESA, and A. Feild (STSci) Exeter University Press release: Scientists have found unmistakable evidence for a stratosphere on an enormous planet outside our solar system, with an atmosphere hot enough to boil iron. An international team of researchers, led… Read more ›
A correlation between giant-planet mass and atmospheric heavy elemental abundance was first noted in the past century from observations of planets in our own Solar System and has served as a cornerstone of planet-formation theory. Using data from the Hubble… Read more ›
The anomalously large radii of strongly irradiated exoplanets have remained a major puzzle in astronomy. In this new ApJ paper, based on a 2D steady state atmospheric circulation model, the validity of which is assessed by comparison to 3D calculations,… Read more ›
The admitted, conventional scenario to explain the complex spectral evolution of brown dwarfs (BDs) since their first detection 20 years ago has always been the key role played by micron-size condensates, called “dust” or “clouds,” in their atmosphere. This scenario,… Read more ›
In a letter published in ApJL, we improve the current understanding of the atmospheres of brown dwarfs, especially cold ones with spectral types T and Y, whose modeling is a current challenge. Silicate and iron clouds are believed to disappear… Read more ›
French post @ CEA/IRFU/SAp “By using the latest data from the Herschel Space Observatory, an international team coordinated by the Astrophysique- Service Laboratory AIM Paris Saclay (CEA-IRFU – CNRS – Université Paris Diderot) has highlighted the impact of massive stars on… Read more ›
French post @ CEA/IRFU/SAp “By comparing the latest Herschel observations with numerical simulations, a team of researchers from the Astrophysics Laboratory Service AIMdu-CEA-IRFU studied the transformation of an interstellar filament in a symmetrically shaped nebula called bipolar nebula, under the effect… Read more ›
Getting there: Plane from New Zealand to Mc Murdo Concordia Station Building the telescope Dumont d’Urville Station Getting back: Astrolabe
Numerical simulations of the ionization of molecular clouds showing the formation of pillars and globules are in cover page of the volume 546 of Astronomy & Astrophysics. The full article is here.
French post @ CEA/IRFU/SAp “Atmospheric transparency of the Antarctic sky favorable to astronomical observations. As part of the evaluation of the astronomical potential of the Concordia station in Antarctica, a campaign on the quality of the site has delivered promising results. It… Read more ›
