Thermal Feedback in the High-mass Star- and Cluster-forming Region W51

Interstellar matter and star formatio

Star formation in 'the Brick': ALMA reveals an active protocluster in the Galactic centre cloud G0.253+0.016

Interstellar matter and star formatio

A Brief Update on the CMZoom Survey

The inner few hundred parsecs of the Milky Way, the Central Molecular Zone (CMZ), is our closest laboratory for understanding star formation in the extreme environments (hot, dense, turbulent gas) that once dominated the universe. We present an update on the first large-area survey to expose the sites of star formation across the CMZ at high-resolution in submillimeter wavelengths: the CMZoom survey with the Submillimeter Array (SMA). We identify the locations of dense cores and search for signatures of embedded star formation. CMZoom is a three-year survey in its final year and is mapping out the highest column density regions of the CMZ in dust continuum and a variety of spectral lines around 1.3 mm. CMZoom combines SMA compact and subcompact configurations with single-dish data from BGPS and the APEX telescope, achieving an angular resolution of about 4″ (0.2 pc) and good image fidelity up to large spatial scales

Star Formation and Dynamics in the Galactic Centre

The centre of our Galaxy is one of the most studied and yet enigmatic places in the Universe. At a distance of about 8 kpc from our Sun, the Galactic centre (GC) is the ideal environment to study the extreme processes that take place in the vicinity of a supermassive black hole (SMBH). Despite the hostile environment, several tens of early-type stars populate the central parsec of our Galaxy. A fraction of them lie in a thin ring with mild eccentricity and inner radius ~0.04 pc, while the S-stars, i.e. the ~30 stars closest to the SMBH (<0.04 pc), have randomly oriented and highly eccentric orbits. The formation of such early-type stars has been a puzzle for a long time: molecular clouds should be tidally disrupted by the SMBH before they can fragment into stars. We review the main scenarios proposed to explain the formation and the dynamical evolution of the early-type stars in the GC. In particular, we discuss the most popular in situ scenarios (accretion disc fragmentation and molecular cloud disruption) and migration scenarios (star cluster inspiral and Hills mechanism). We focus on the most pressing challenges that must be faced to shed light on the process of star formation in the vicinity of a SMBH.Comment: 68 pages, 35 figures; invited review chapter, to be published in expanded form in Haardt, F., Gorini, V., Moschella, U. and Treves, A., 'Astrophysical Black Holes'. Lecture Notes in Physics. Springer 201

Linearly polarized millimeter and submillimeter continuum emission of Sgr A* constrained by ALMA

Contains fulltext : 161144.pdf (publisher's version ) (Open Access)11 p

The 492 GHz emission of Sgr A* constrained by ALMA

Contains fulltext : 161191.pdf (publisher's version ) (Open Access)11 p

Discovery of 14NH3 (2,2) Maser Emission in Sgr B2 Main

Contains fulltext : 199274.pdf (preprint version ) (Open Access

Changements de representation des donnees dans le calcul des constructions inductives

Theme 2 - Genie logiciel et calcul symbolique - Projet LemmeSIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : 14802 E, issue : a.2000 n.4039 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Super star clusters in the central starburst of NGC 4945

Galaxie