Context. Theoretical scenarios propose that high-mass stars are formed by disk-mediated accretion. Aims. To test the theoretical predictions on the formation of massive stars, we wish to make a thorough study at high-angular resolution of the structu...
Document(s)
Title
In diffuse interstellar clouds the chemistry that leads to the formation of the oxygen-bearing ions OH+, H2O+, and H3O+ begins with the ionization of atomic hydrogen by cosmic rays, and continues through subsequent hydrogen abstraction reactions invo...
Context. The formation process of high-mass stars (with masses >8 M-circle dot) is still poorly understood, and represents a challenge from both the theoretical and observational points of view. The advent of the Atacama Large Millimeter Array (ALMA)...
Context. In dense parts of interstellar clouds (>= 10(5) cm(-3)), dust and gas are expected to be in thermal equilibrium, being coupled via collisions. However, previous studies have shown that in the presence of intense radiation fields, the tempera...
Context. The ethynyl radical (C2H) is one of the first radicals to be detected in the interstellar medium. Its higher rotational transitions have recently become available with the Herschel Space Observatory. Aims. We aim to constrain the physical pa...
In diffuse interstellar clouds the chemistry that leads to the formation of the oxygen-bearing ions OH+, H2O+, and H3O+ begins with the ionization of atomic hydrogen by cosmic rays, and continues through subsequent hydrogen abstraction reactions invo...
Aims. We try to understand the gas heating and cooling in the S 140 star-forming region by spatially and spectrally resolving the distribution of the main cooling lines with GREAT/SOFIA and combining our data with existing ground-based and Herschel o...
The observations were made with HIFI onboard Herschel on 2012 August 28 with observation id (obsid) 1342250409. The HF map of the Orion Bar was centered on the CO+ peak, that is, RA=05:35:20.8, DE=-05:25:17.10 (J2000). Reference spectra have been tak...
International audience
With the recent discovery of a dozen dusty star-forming galaxies and around 30 quasars at z>5 that are hyper-luminous in the infrared ($mu$$L_ m IR>10^13$ L$_odot$, where $mu$ is a lensing magnification factor), the possibility has opened up for SPIC...