Déclaration du code d’éthique de la CASCA

Compte tenu de récents événements, nous aimerions profiter de cette occasion pour informer toutes les parties concernées que la CASCA a adopté son propre code d’éthique.  CASCA ne tolère  pas les comportements contraires à cette déclaration, y compris  le sexisme, les comportements violents, et le harcèlement en milieu  de travail.

En ce qui concerne la conduite envers les autres, la Déclaration stipule explicitement: « Toutes les personnes rencontrées au hasard de sa vie professionnelle doivent être traitées avec respect et dignité. Discrimination, harcèlement et comportements abusifs, que ce soit  auprès de collègues, étudiants, membres des médias ou du public, ne sont jamais acceptables.  L’égalité des chances doit être assurée sans distinction de la “race, l’origine nationale ou ethnique, la couleur,  la religion, l’âge, le sexe, l’orientation sexuelle, l’état matrimonial, la situation familiale, la déficience ou l’état d’une personne graciée.” (citation de la “Loi canadienne sur les droits de l’homme”).

Le conseil de direction

CASCA’s Ethics Statement

In light of recent events, we would like to take this opportunity to inform all interested parties that CASCA has adopted an Ethics Statement.  CASCA does not condone behaviour contrary to this statement, including sexism, abusive behaviours, and harassment in the professional workplace.

Regarding conduct towards others, the Statement explicitly states, « All people encountered in one’s professional life must be treated with respect and dignity.  Discrimination, harassment and abusive behaviours, be it against colleagues, students, or members of the media or the public, are never acceptable.  Equal opportunities must be provided regardless of “race, national or ethnic origin, colour, religion, age, sex, sexual orientation, marital status, family status, disability and conviction for an offense for which a pardon has been granted or in respect of which a record suspension has been ordered” (quoted from “The Canadian Human Rights Act »). »

The CASCA Board

Birth of Planets Revealed in Astonishing Detail in ALMA’s ‘Best Image Ever’

Astronomers have captured the best image ever of planet formation around an infant star as part of the testing and verification process for the Atacama Large Millimeter/submillimeter Array’s (ALMA) new high-resolution capabilities.

https://public.nrao.edu/images/non-gallery/2014/c-blue/11-05-HL-Tau/HLTau_nrao.jpg
ALMA image of the young star HL Tau and its protoplanetary disk. This best image ever of planet formation reveals multiple rings and gaps that herald the presence of emerging planets as they sweep their orbits clear of dust and gas. Credit: ALMA (NRAO/ESO/NAOJ); C. Brogan, B. Saxton (NRAO/AUI/NSF)

This revolutionary new image reveals in astonishing detail the planet-forming disk surrounding HL Tau, a Sun-like star located approximately 450 light-years from Earth in the constellation Taurus.

ALMA uncovered never-before-seen features in this system, including multiple concentric rings separated by clearly defined gaps. These structures suggest that planet formation is already well underway around this remarkably young star.

« These features are almost certainly the result of young planet-like bodies that are being formed in the disk. This is surprising since HL Tau is no more than a million years old and such young stars are not expected to have large planetary bodies capable of producing the structures we see in this image, » said ALMA Deputy Director Stuartt Corder.

All stars are believed to form within clouds of gas and dust that collapse under gravity. Over time, the surrounding dust particles stick together, growing into sand, pebbles, and larger-size rocks, which eventually settle into a thin protoplanetary disk where asteroids, comets, and planets form.

Once these planetary bodies acquire enough mass, they dramatically reshape the structure of their natal disk, fashioning rings and gaps as the planets sweep their orbits clear of debris and shepherd dust and gas into tighter and more confined zones.

The new ALMA image reveals these striking features in exquisite detail, providing the clearest picture to date of planet formation. Images with this level of detail were previously only seen in computer models and artist concepts. ALMA, living up to its promise, has now provided direct proof that nature and theory are very much in agreement.

« This new and unexpected result provides an incredible view of the process of planet formation. Such clarity is essential to understand how our own Solar System came to be and how planets form throughout the Universe, » said Tony Beasley, director of the National Radio Astronomy Observatory (NRAO) in Charlottesville, Virginia, which manages ALMA operations for astronomers in North America.

HL Tau is hidden in visible light behind a massive envelope of dust and gas. Since ALMA observes at much longer wavelengths, it is able to peer through the intervening dust to study the processes right at the core of this cloud. « This is truly one of the most remarkable images ever seen at these wavelengths. The level of detail is so exquisite that it’s even more impressive than many optical images. The fact that we can see planets being born will help us understand not only how planets form around other stars but also the origin of our own Solar System, » said NRAO astronomer Crystal Brogan.

ALMA’s new high-resolution capabilities were achieved by spacing the antennas up to 15 kilometers apart. This baseline at millimeter wavelengths enabled a resolution of 35 milliarcseconds, which is equivalent to a penny as seen from more than 110 kilometers away.

« Such a resolution can only be achieved with the long baseline capabilities of ALMA and provides astronomers with new information that is impossible to collect with any other facility, including the best optical observatories, » noted ALMA Director Pierre Cox.

These long baselines fulfill one of ALMA’s major objectives and mark an impressive technological and engineering milestone. Future observations at ALMA’s longest possible baseline of 16 kilometers will produce even clearer images and continue to expand our understanding of the cosmos.

« This observation illustrates the dramatic and important results that come from NSF supporting world-class instrumentation such as ALMA, » said Fleming Crim, the National Science Foundation assistant director for Mathematical and Physical Sciences. « ALMA is delivering on its enormous potential for revealing the distant Universe and is playing a unique and transformational role in astronomy. »

Original press release: https://public.nrao.edu/news/pressreleases/planet-formation-alma