Searching for OH maser emission towards the MIPSGAL compact Galactic bubbles

A. Ingallinera, C. Trigilio, P. Leto, G. Umana, C. Buemi, L. Cerrigone, C. Agliozzo

Resultado de la investigación: Contribución a una revistaArtículo

2 Citas (Scopus)

Resumen

We conducted radio observations searching for OH 18-cm maser emission from a sample of 169 unclassified MIPSGAL compact Galactic bubbles. These sources are thought to be the circumstellar envelopes of different kinds of evolved stars. Our observations were aimed at shedding light on the nature ofMIPSGAL bubbles, since their characterization is a fundamental aid for the development of accurate physical models of stellar and Galaxy evolution. The maser emission is observationally linked to the last stages of the life of low- and intermediate-mass stars, which may constitute a significant fraction of the MIPSGAL bubbles. In particular OH masers are usually observed towards post-asymptotic giant branch (post-AGB) stars. Our observations were performed with the Green Bank Telescope and, for each source, produced spectra around the four OH 18-cm transitions. The observations were compared with archive interferometer data in order to exclude possible contamination from nearby sources. The main result is that the OH maser emission is not a common feature among the MIPSGAL bubbles, with only one certain detection. We conclude that among theMIPSGAL bubbles the post-AGB stars could be very rare.

Idioma originalInglés
Páginas (desde-hasta)3203-3212
Número de páginas10
PublicaciónMonthly Notices of the Royal Astronomical Society
Volumen453
N.º3
DOI
EstadoPublicada - 2015

Áreas temáticas de ASJC Scopus

  • Astronomía y astrofísica
  • Ciencias planetarias y espacial

Huella Profundice en los temas de investigación de 'Searching for OH maser emission towards the MIPSGAL compact Galactic bubbles'. En conjunto forman una huella única.

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    Ingallinera, A., Trigilio, C., Leto, P., Umana, G., Buemi, C., Cerrigone, L., & Agliozzo, C. (2015). Searching for OH maser emission towards the MIPSGAL compact Galactic bubbles. Monthly Notices of the Royal Astronomical Society, 453(3), 3203-3212. https://doi.org/10.1093/mnras/stv1878