sant aux membres du groupe d’astrophysique nucléaire de la tolérance dont ils font preuve quand je m’égare Nous avons été rejoints en cours de route par Gilles. Maurin, avec Evans, A., et al. , MNRAS, , L1. – 44 heures de cours de TD de physique en DEUG B premi`ere année Enfin, d’un point de vue plus astrophysique, les binaires X , L1. Yamauchi, S., Asaoka, I., Kawada, M., et al. , PASJ, 42, L Astronomy and Astrophysics – A&A, EDP Sciences, , cours. L1. 〈 //〉. 〈hal〉, Link. , Axel Nothnagel.
|Published (Last):||14 April 2008|
|PDF File Size:||4.15 Mb|
|ePub File Size:||3.90 Mb|
|Price:||Free* [*Free Regsitration Required]|
Star formation is the central process of the galactic cycle of matter and is at the origin of the formation of planetary systems. While simple in principle gravitational collapse of an interstellar cloud of gas and dustthe details of the process are far from being well understood, especially for the most massive stars.
In nearby galaxies, we address the question of the universality of the star formation process by probing a large range of physical conditions. High-mass star formation is not well explained with scenarios applying to low-mass star formation.
The massive stars have masses significantly in excess of the typically observed Jeans masses in the interstellar medium. Resolving this issue may ultimately allow us to explain the origin of the upper limit for stellar masses of the order of to M sun. Astrochemistry provides a way to constrain the physical processes responsible for the formation of stars and, more importantly, the best way to evaluate to which extent complex molecules, especially those of prebiotic interest, are formed in the interstellar medium.
To this end, our team is also hunting for the rare complex molecules towards Orion KL, one of the two reference targets for such studies SgrB2 being the second one.
We plan to follow the chemical evolution of massive protostars to couts to identify the dominant processes leading to the formation of complex molecules. At the other end of the stellar life cycle, complex mass-loss processes dominate the evolution of a star when its nuclear fusion reactions have stopped. The dust and molecules formed at this stage enrich the interstellar medium.
ONLINE PEOPLE DIRECTORY
The magnetic field plays a decisive role at several stages of the star evolution, from its formation to its most evolved stages. Our group works at characterizing the magnetic couts in the evolved stages using Xpol on the IRAM 30m.
Nearby galaxies in the Local Group offer a unique opportunity to probe a significant range of galactic environments and conditions to test the universality of the star formation process, including structuration and formation of molecular clouds. Our group investigates for instance the relationship between the amount of dense gas and the star formation rate as well as the properties of the population of molecular clouds in nearby galaxies such as M33 projects HerM33es and STARFICH.
Directeur de recherche CNRS. Laboratoire d’Astrophysique astrophysjque Bordeaux. FS — Star Formation Presentation Members Projects Publications Star formation is the central process of the galactic cycle of matter and is at the origin of the formation of planetary systems. Origin and formation of massive stars High-mass star formation is not well explained with scenarios applying to low-mass star formation. Astrochemistry in massive protostars Astrochemistry provides a way coours constrain the physical processes responsible for the formation of stars and, more importantly, the best way to evaluate to which extent complex molecules, especially those of prebiotic interest, are formed in the interstellar medium.
Stellar evolution and magnetic field At the other end of the stellar life cycle, complex mass-loss processes dominate the evolution of a star when its nuclear fusion reactions have stopped. Diversity and origin of star formation events in the local group Nearby galaxies in the Local Group offer a unique opportunity to probe a significant range of galactic environments and conditions to test the universality of the star formation process, including structuration and formation of molecular clouds.
Thierry Jacq Astronome adjoint Formation of high-mass stars. Detection of a high-mass prestellar core candidate in WMM1. Gaia Data Release satrophysique.
The catalogue of radial velocity standard stars. Observations of solar system objects. Kinematics of globular clusters and dwarf galaxies around the Milky Way. De Bruijne, et al. Summary of the contents and survey properties. The celestial reference frame Gaia-CRF2.
Gaia Data Release 2: Heterodyn receiver for the Origins Space Telescope concept 2. Space Telescopes and Instrumentation VizieR Online Data Catalog: VizieR On-line Data Catalog: Laboratory spectroscopy of methoxymethanol in the millimeter-wave range.
Alain Baudry, Fabrice Herpin, E. The Messenger, pp. Rotation of the asymptotic giant branch star R Doradus. Edvige Corbelli, Bruce G. Probability distribution functions of gas surface density in M Spatially resolving the dust properties and submillimetre excess in M Humphreys, Fabrice Herpin, K.
Vibrationally excited water emission at GHz from evolved stars. Mapping the Astrohpysique Way disc kinematics. Braine, Erik Rosolowsky, P. Gratier, Edvige Corbelli, Karl Schuster. Properties and rotation of molecular clouds in M Csengeri, Sylvain Bontemps, F.
FS – Star Formation | Laboratoire d’Astrophysique de Bordeaux – LAB
Indication for a astrophysiqur barrier in the environment of a single high-mass envelope. Van Der Tak, S. Marsh, Sylvain Bontemps, et al. The unexpectedly large proportion of high-mass star-forming cores in a Galactic mini-starburst. Nature Astronomy, Nature Publishing Group,2, pp.
Core fragmentation and Toomre stability analysis of W3 H2O: Anatomy of the massive star-forming region Courx Introduction to the Survey.
Evolution of the magnetic field of Betelgeuse from – Chemical segregation of complex organic O-bearing species in Orion KL. Properties of the ionised gas filament of M Far-infrared observations of a massive cluster forming in the Monoceros R2 filament hub. Agudo, Alain Baudry, D.
Gray, Alain Baudry, L. Hot and cold running water: Chemical differentiation in the inner envelope of a young high-mass protostar associated with Class II methanol maser emission. Di Matteo, Fabrice Herpin, E. Semaine de l’Astrophysique Francaise. Fabrice Herpin, Alain Baudry, A. Structure, excitation, and dynamics of the inner Galactic interstellar medium. Gaia Data Release 1. Testing the parallaxes with local Cepheids and RR Lyrae stars. Herschel observations of compact sources.
Testing the universality of the star formation efficiency in dense molecular gas. Co-Aligned Chemical and Mineralogical Astrophysjque. Tafoya, Alain Baudry, et al. Limited fragmentation at the early evolutionary stage of massive clumps. Leurini, Fabrice Herpin, F. Van Der Tak, F. Distribution of water in the G Braine, Rino Bandiera, N.
From molecules to Young Stellar Clusters: Astrophysical Journal, American Astronomical Society,1pp. L’observatoire astronomique de Bordeaux: Astrophyeique sample of young massive cluster progenitors. The Rise of Metals and Dust. The Power of IR Spectroscopy. Proper motion survey and kinematic analysis of the Rho Ophiuchi embedded cluster. Dense gas in low-metallicity galaxies.
IPAG | Institut de Planétologie et d’Astrophysique de Grenoble
Limited fragmentation at the early evolutionary stage of massive clumps. Outflows, infall and evolution of a sample of embedded low-mass protostars. Tracing the evolution of dust obscured star-formation and accretion back to the reionisation epoch with SPICA.
The molecular gas mass of M Summary of the astrometric, photometric, and survey properties. Star formation and chemical complexity in the Orion nebula: Comptes Rendus Physique, Elsevier Masson,17, pp. Krone-Martins, Sylvain Bontemps, D.
Bujarrabal, Alain Baudry, P. De Vicente, et al.