Search Publications
On the far-infrared metallicity diagnostics: applications to high-redshift galaxies
Marques-Chaves, R.; Magdis, G. E.; Cooray, A. +5 more
In an earlier paper we modelled the far-infrared emission from a star-forming galaxy using the photoionization code CLOUDY and presented metallicity sensitive diagnostics based on far-infrared fine structure line ratios. Here, we focus on the applicability of the [O III] 88 µm/[N II] 122 µm line ratio as a gas-phase metallicity indicat…
PAHs and star formation in the H II regions of nearby galaxies M83 and M33
Tielens, A. G. G. M.; Peeters, E.; Stock, D. J. +3 more
We present mid-infrared (MIR) spectra of H II regions within star-forming galaxies M83 and M33. Their emission features are compared with Galactic and extragalactic H II regions, H II-type galaxies, starburst galaxies, and Seyfert/LINER type galaxies. Our main results are as follows: (i) the M33 and M83 H II regions lie in between Seyfert/LINER ga…
Herschel Planetary Nebula Survey (HerPlaNS). hydrogen recombination laser lines in Mz 3
Montez, Rodolfo; Villaver, Eva; Ueta, Toshiya +12 more
The bipolar nebula Menzel 3 (Mz 3) was observed as part of the Herschel Planetary Nebula Survey (HerPlaNS), which used the PACS and SPIRE instruments aboard the Herschel Space Observatory to study a sample of planetary nebulae (PNe). In this paper, one of the series describing HerPlaNS results, we report the detection of H I recombination lines (H…
On the detection of CO and mass-loss of bulge OH/IR stars
Blommaert, J. A. D. L.; Justtanont, K.; Decin, L. +1 more
We report on the successful search for CO (2-1) and (3-2) emission associated with OH/IR stars in the Galactic bulge. We observed a sample of eight extremely red asymptotic giant branch stars with the Atacama Pathfinder EXperiment telescope and detected seven. The sources were selected at a sufficiently high galactic latitude to avoid interference…
The role of external far-ultraviolet irradiation in the survival of astrophysical ices in Elias 29
Rocha, W. R. M.; Pilling, S.
The survival of astrophysical ices in star-forming regions depends on the suitability of temperature, density and radiation conditions. In this article, the role of the interstellar radiation field (ISRF) on ices in Elias 29 is addressed. This object is the most luminous protostar in the ρ Oph E molecular cloud and is surrounded by many young stel…
On the inner disc structure of MWC480: evidence for asymmetries?
Matter, A.; Lopez, B.; Sitko, M. L. +7 more
Studying the physical conditions structuring the young circumstellar discs is required for understanding the onset of planet formation. Of particular interest is the protoplanetary disc surrounding the Herbig star MWC480. The structure and properties of the circumstellar disc of MWC480 are studied by infrared interferometry and interpreted from a …