Results 31 to 40 of about 4,855 (170)
OH masers in the Milky Way and Local Group galaxies in the SKA era
, 2015 The intense line emission of OH masers is a perfect tracer of regions where new stars are born aswell as of evolved stars, shedding large amounts of processed matter into the interstellar medium. From SKA deep surveys at 18 cm, where the maser lines from
Dawson, Joanne +6 more
core +1 more source
Searching for OH maser emission towards the MIPSGAL compact Galactic bubbles [PDF]
, 2015 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.
Agliozzo, C. +6 more
core +2 more sources
Surveys of the Milky Way and Magellanic System in the λ21-cm line of atomic hydrogen
EPJ Web of Conferences, 2012 In the next three years, surveys of the Northern and Southern skies using focal plane arrays on aperture synthesis radio telescopes will lead to a breakthrough in our knowledge of the warm and cool atomic phases of the interstellar medium and their ...
Dickey J.M.
doaj +1 more source
Time Variations of Interstellar Water Masers in HII Regions [PDF]
Monthly Notices of the Royal Astronomical Society, 1979 Previous studies of time variations in water vapour sources associated with HII regions by Sullivan (1971, 1973) and Gammon (1976) have revealed variability on time-scales of 106-107s. Sullivan monitored nine sources over a period of 14 months and Gammon observed W49 (H2O) for 13 months.
White, G. J., Macdonald, G.H.
openaire +2 more sources
Scintillation in the Circinus Galaxy water megamasers
, 2004 We present observations of the 22 GHz water vapor megamasers in the Circinus galaxy made with the Tidbinbilla 70m telescope. These observations confirm the rapid variability seen earlier by Greenhill et al (1997).
David L. Jauncey +6 more
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Chemistry in Interstellar Hydroxyl Maser Regions [PDF]
Symposium - International Astronomical Union, 1987 The pumping of the upper levels of the 2π3/2 J=3/2 state of OH at sufficient rates to account for the observed strengths of interstellar hydroxyl masers requires that OH contains a substantial fraction of the oxygen. Shocks have been suggested as the sites of the OH production, but a better understanding of OH photodissociation and observations of ...
openaire +1 more source
Current stage of the ATCA follow-up for SPLASH
, 2017 Four ground-state OH transitions were detected in emission, absorption and maser emission in the Southern Parkes Large-Area Survey in Hydroxyl (SPLASH).
Qiao, Hai-Hua +2 more
core +1 more source
ATLASGAL – relationship between dense star-forming clumps and interstellar masers [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT We have used catalogues from several Galactic plane surveys and dedicated observations to investigate the relationship between various maser species and Galactic star-forming clumps, as identified by the APEX Telescope Large Area Survey of the Galaxy (ATLASGAL) survey.
S J Billington +12 more
openaire +8 more sources
ALMA Detection of Masers and Dasars in the Hydrogen Recombination Lines of the Planetary Nebula Mz3
The Astrophysical JournalThe hydrogen recombination lines H30 α , H40 α , H42 α , H50 β , and H57 γ and the underlying bremsstrahlung continuum emission were detected with ALMA in the bipolar nebula Mz3.
Zulema Abraham +7 more
doaj +1 more source
The catalogues and mid-infrared environment of Interstellar OH Masers [PDF]
, 2014 Data for a number of OH maser lines have been collected from surveys. The posi- tions are compared to recent mid-infrared (MIR) surveys such as Spitzer-GLIMPSE and WISE, restricting the comparison to point sources.
Chen, Xi +4 more
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