Astronomy

This article reports the interstellar detection of urea. The detection was made possible thanks to a new, sensitive spectral line survey carried out with ALMA toward the high-mass star-forming region Sgr B2(N).

https://arxiv.org/abs/1906.04614

This article analyzes the chemical composition of a sample of hot molecular cores detected with ALMA in the high-mass star forming region Sgr B2(N). It shows that a cosmic-ray ionization rate enhanced by a factor 50 best reproduces the observed abundance ratios of various complex organic molecules.

https://arxiv.org/abs/1906.04695

This article analyzes the chemical composition of a sample of hot molecular cores detected with ALMA in the high-mass star forming region Sgr B2(N). It shows that a cosmic-ray ionization rate enhanced by a factor 50 best reproduces the observed abundance ratios of various complex organic molecules.

https://arxiv.org/abs/1906.04695

Geometry of S235 resolved from SOFIA observations of ionized carbon

Velocity-resolved observations of ionized carbon in the HII-region S235 show that, although most of the radiation comes from the direction of ionized hydrogen, it has a different velocity than the ionized hydrogen. Practically the emission does not come from the same gas, but from photon-dominated dense gas behind the HII region.

https://arxiv.org/pdf/1904.12029.pdf (accepted by ApJ)

Geometry of S235 resolved from SOFIA observations of ionized carbon

Velocity-resolved observations of ionized carbon in the HII-region S235 show that, although most of the radiation comes from the direction of ionized hydrogen, it has a different velocity than the ionized hydrogen. Practically the emission does not come from the same gas, but from photon-dominated dense gas behind the HII region.

https://arxiv.org/pdf/1904.12029.pdf (accepted by ApJ)

We report the first velocity-resolved observations of atomic oxygen in the Large Magellanic Cloud (LMC) seen in emission lines at a wavelength of 63 and 145 micrometers. The line profiles neither match those from ionized carbon nor from carbon monoxide. This confirms that clouds in very different physical conditions co-exist within the observing beam.

https://doi.org/10.1051/0004-6361/201833398

We report the first velocity-resolved observations of atomic oxygen in the Large Magellanic Cloud (LMC) seen in emission lines at a wavelength of 63 and 145 micrometers. The line profiles neither match those from ionized carbon nor from carbon monoxide. This confirms that clouds in very different physical conditions co-exist within the observing beam.

https://doi.org/10.1051/0004-6361/201833398

The large telescope ALMA has been used to discover for the first time a number of filaments converging to the center of the very massive star-forming region named Sagittarius B2 (North). These filaments transport mass at a high rate resulting in the formation of star like the Sun every 6 years. With our results we propose that Sagittarius B2 (North) can represent the first example of a super stellar cluster in the making. More details can be found in the link below.

https://arxiv.org/abs/1906.10979

The large telescope ALMA has been used to discover for the first time a number of filaments converging to the center of the very massive star-forming region named Sagittarius B2 (North). These filaments transport mass at a high rate resulting in the formation of star like the Sun every 6 years. With our results we propose that Sagittarius B2 (North) can represent the first example of a super stellar cluster in the making. More details can be found in the link below.

https://arxiv.org/abs/1906.10979