English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

To show the importance of high-spatial resolution observations of HII regionswhen compared with observations obtained with larger apertures such as ISO, wepresent mid-infrared spectra of two Magellanic Cloud HII regions, N88A andN160A. We obtained mid-infrared (8-13 um), long-slit spectra with TIMMI2 on theESO 3.6m telescope. These are combined with archival spectra obtained with theInfrared Spectrograph (IRS) onboard the Spitzer Space Telescope, and arecompared with the low-spatial resolution ISO-SWS data. An inventory of thespectra in terms of atomic fine-structure lines and molecular bands ispresented. Concerning N88A, an isolated HII region with no adjacent infraredsources, the observations indicate that the line fluxes observed by ISO-SWS andSpitzer-IRS come exclusively from the compact HII region of about 3 arcsec indiameter. This is not the case for N160A, which has a more complex morphology.We have spectroscopically isolated for the first time the individualcontributions of the three components of N160A, two high-excitation blobs, A1and A2, and the young stellar object N160A-IR. In addition, extended [SIV]emission is observed with TIMMI2 and is most likely associated with the centralstar cluster located between A1 and A2. We show the value of these high-spatialresolution data in determining source characteristics, such as the degree ofionization of each high-excitation blob or the bolometric luminosity of theYSO. This luminosity is about one order of magnitude lower than previouslyestimated. For each high-excitation blob, we also determine the electrondensity and the elemental abundances of Ne, S, and Ar.

A mid-infrared study of HII regions in the Magellanic Clouds: N88A and N160A