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: Article

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

Huella dactilar

masers
bubble
bubbles
asymptotic giant branch stars
stars
radio observation
stellar evolution
interferometer
contamination
envelopes
interferometers
telescopes
radio
galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

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
Ingallinera, A. ; Trigilio, C. ; Leto, P. ; Umana, G. ; Buemi, C. ; Cerrigone, L. ; Agliozzo, C. / Searching for OH maser emission towards the MIPSGAL compact Galactic bubbles. En: Monthly Notices of the Royal Astronomical Society. 2015 ; Vol. 453, N.º 3. pp. 3203-3212.
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abstract = "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.",
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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, vol. 453, n.º 3, pp. 3203-3212. https://doi.org/10.1093/mnras/stv1878

Searching for OH maser emission towards the MIPSGAL compact Galactic bubbles. / Ingallinera, A.; Trigilio, C.; Leto, P.; Umana, G.; Buemi, C.; Cerrigone, L.; Agliozzo, C.

En: Monthly Notices of the Royal Astronomical Society, Vol. 453, N.º 3, 2015, p. 3203-3212.

Resultado de la investigación: Article

TY - JOUR

T1 - Searching for OH maser emission towards the MIPSGAL compact Galactic bubbles

AU - Ingallinera, A.

AU - Trigilio, C.

AU - Leto, P.

AU - Umana, G.

AU - Buemi, C.

AU - Cerrigone, L.

AU - Agliozzo, C.

PY - 2015

Y1 - 2015

N2 - 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.

AB - 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.

KW - ISM: lines and bands

KW - Masers

KW - Stars: AGB and post-AGB

KW - Techniques: spectroscopic

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