[AAA] First announcement IAUS 272

[Asociación Argentina de Astronomía - Comisión Directiva]

Estimado Socios,
Se adjunta anuncio del IAUS 272. Para mas informacion se puede contactar a
la Dra. Lydia Cidale, miembro del SOC.
Saludos

Comisión Directiva
Asociación Argentina de Astronomía

aaacd en fcaglp.unlp.edu.ar
http://www.astronomiaargentina.org.ar

Observatorio Astronómico de Córdoba
Laprida 854
X5000BGR - Córdoba
Argentina

Tel/fax: +54-351-4331064
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IAU Symposium 272: "Active OB stars: structure, evolution, mass loss, and
critical limits"
Paris, July 19-23, 2010
http://iaus272.obspm.fr

First announcement:

Early-type (OB) stars dominate the ecology of the universe as cosmic engines via
their extreme output of radiation and matter, not only as supernovae but also
during their entire lifetimes with far-reaching consequences. Active OB stars
are massive and intermediate-mass stars that display strong variability on
various time scales due to such phenomena as mass outflows, rapid rotation,
pulsations, magnetism, binarity, radiative instabilities, and the influence of
their circumstellar environment. This concerns in particular classical and
Herbig Be, Bp, beta Cep, Slowly Pulsating B Stars (SPB), B[e] and O stars, as
well as massive binaries such as the Be X-ray binaries and those that harbor
O-type subdwarf companions.

The IAU Symposium 272 will be dedicated to discussion of the structure,
evolution, mass loss, and critical limits of active early-type stars, four axes
of research that are currently providing important clues about the physics of
these objects. We expect that the meeting will allow fruitful exchange by
bringing together scientists working in the fields of O stars, B stars, Bp
stars, Be stars and Herbig Be stars, at wavelengths that span the
electromagnetic spectrum (especially X-ray, UV, optical, and IR) with emphasis
on forefront observational techniques (e.g. spectropolarimetry, interferometry,
asteroseismology). We thus expect that the meeting will result in further
important progress in our understanding of active OB stars and give rise to new
projects that will be undertaken in the second decade of the 21st century.

The key topics of the IAU Symposium 272 are:
    * the internal structure of active OB stars: pulsations, rotation, magnetism,
transport processes
    * their evolution: stellar environment, formation, binaries, late stages
(including magnetars and GRBs)
    * their circumstellar environment: disks, magnetospheres, the Be phenomenon,
wind, clumping
    * active OB stars as extreme condition test beds: critical rotation, mass
loss, radiation fields '
    * normal' OB stars as calibrators: fundamental parameters, astronomical
quantities
    * populations of OB stars: population studies, tracers of galactic
structure, cosmic history

The IAU Symposium 272 will be held in Paris from July 19 to 23, 2010.
Pre-registrations are open at http://iaus272.obspm.fr for those who wish to
receive further information. The website also provides details about the
Symposium scientific topics and local information. For further inquiries please
contact iaus272.info en obspm.fr. The symposium is co-sponsored by the IAU and the
Paris Observatory.

We are looking forward to seeing you in Paris in 2010!
  
		Coralie Neiner, for the SOC