257 datasets found

Keywords: astrophysical masers

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  • Distances towards 6.7GHz methanol masers

    Distances to most star forming regions are determined using kinematics, through the assumption that the observed radial velocity arises from the motion of the source with...
  • Interferometric study of SgrB2(N)

    Amino acids are building blocks of proteins and therefore key ingredients for the origin of life. The simplest amino acid, glycine (NH2CH2COOH), has long been searched for in...
  • ATCA 3mm obs. of NGC 6334I and NGC 6334I(N)

    We investigate the dense gas, the outflows, and the continuum emission from the massive twin cores NGC 6334I and I(N) at high spatial resolution. We imaged the region with the...
  • Mid-IR and radio interferometry of S Ori

    We present the first multi-epoch study that includes concurrent mid-infrared and radio interferometry of an oxygen-rich Mira star. We obtained mid-infrared interferometry of S...
  • High-resolution images in Cep-A HW2 region

    Due to its relatively small distance (725pc), the Cepheus A East star-forming region is an ideal laboratory to study massive star formation processes. Based on its morphology,...
  • Hot ammonia from NGC 6334I and NGC 6334I(N)

    The massive twin cores NGC 6334I and I(N) are in different evolutionary stages and hence ideal targets to study evolutionary variations within the same larger-scale environment....
  • OH masers towards high mass protostellar object

    Masers are important tracers of the early evolution of young high mass stars, but the relationship between different types of maser and the evolutionary state of the exciting...
  • 86GHz SiO maser survey of late-type stars. III

    We have determined extinction corrections for a sample of 441 late-type stars in the inner Galaxy, which we previously searched for SiO maser emission, using the 2MASS...
  • Water maser survey of methanol maser sources

    High sensitivity observations of the 22GHz water maser emission have been carried out with the Effelsberg 100m radio telescope. The observed sample was 79 candidate high-mass...
  • The 35um absorption line towards 1612MHz masers

    The 1612MHz hydroxyl maser in circumstellar envelopes has long been thought to be pumped by 34.6{mu}m photons. Only recently, the Infrared Space Observatory has made possible...
  • General Catalogue of 6.7GHz Methanol Masers

    Methanol masers are often detected in regions of intense star formation. Several studies in the last decade indicate that they may even be the earliest signpost of a high-mass...
  • Rest frequencies of methanol maser lines

    We report accurate laboratory measurements of selected methanol transition frequencies between 0.834 and 230GHz in order to facilitate astronomical velocity analyses. New data...
  • 86GHz SiO maser survey in the Inner Galaxy

    We present a compilation and study of DENIS, 2MASS, ISOGAL, MSX and IRAS 1-25 microns photometry for a sample of 441 late-type stars in the inner Galaxy, which we previously...
  • Maser and outflows in UC HII region

    We report the results of a single-dish survey of molecular outflows towards a homogeneous sample of 136 ultracompact HII regions for which we had previously obtained...
  • OH maser emission from star forming regions

    High sensitivity observations of all four transitions of the ground state at 18cm of OH in both senses of circular polarization have been carried out with the Nancay radio...
  • 12.2 GHz methanol survey

    We present results of 12.2GHz methanol maser survey done with the Torun 32 meter radio telescope. We examined 261 star forming sites, known as containing 6.7GHz maser emission...
  • Warm dust near methanol masers

    Continuum emission at 450 and 850{mu}m from warm dust has been mapped in the fields of 71 methanol masers. Within these fields lie 30 centimetre-wave radio continuum sources and...
  • 6.7GHz methanol masers survey of low-mass YSO

    We report the results of a search for 6.7-GHz methanol masers toward low-mass young stellar objects (YSOs) and (pre)protostellar condensations with the Australia Telescope...
  • OH 5-cm line survey in late-type stars

    We have undertaken a comprehensive search for 5-cm excited OH maser emission from evolved stars representative of various stages of late stellar evolution. Observed sources were...
  • 86GHz SiO maser survey of late-type stars

    We present 86GHz (v=1, J=2-1) SiO maser line observations with the IRAM 30-m telescope of a sample of 444 late-type stars in the Inner Galaxy (-4{deg}<l<+30{deg}). These...
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