263 datasets found

Keywords: astrophysical masers

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  • MALT-45, 44 GHz class I methanol masers

    We detail interferometric observations of 44GHz class I methanol masers detected by MALT-45 (a 7mm unbiased auto-correlated spectral-line Galactic-plane survey) using the...
  • HOPS. III. Dense molecular gas properties

    The H_2_O Southern Galactic Plane Survey (HOPS) has mapped 100deg^2^ of the Galactic plane for water masers and thermal molecular line emission using the 22m Mopra telescope. We...
  • SCUBA observations of cold cores

    We report the results of a submillimetre continuum emission survey targeted towards 78 star formation regions, 72 of which are devoid of methanol maser and UC HII regions,...
  • SIMBA observations of cold cores

    We report the results of a 1.2-mm continuum emission survey toward 131 star-forming complexes suspected of undergoing massive star formation. These regions have previously been...
  • X-ray & MIR luminosities of the GBT galaxies

    We present an investigation of the dependence of H_2_O maser detection rates and properties on the mid-IR active galactic nucleus (AGN) luminosity, L_AGN_, and the obscuring...
  • The Megamaser Cosmology Project (MCP). IX.

    As part of the Megamaser Cosmology Project, we present VLBI maps of nuclear water masers toward five galaxies. The masers originate in sub-parsec circumnuclear disks. For three...
  • Ultra-compact HII regions & methanol masers. I.

    We conducted Very Large Array C-configuration observations to measure positions and luminosities of Galactic Class II 6.7GHz methanol masers and their associated ultra-compact...
  • ALMA and VLA radio continuum obs. of NGC 6334I

    We present Very Large Array and Atacama Large Millimeter/submillimeter Array imaging of the deeply embedded protostellar cluster NGC 6334I from 5cm to 1.3mm at angular...
  • VLBA observations of H20 maser in IRAS 18286-0959

    We report the results of multi-epoch Very Long Baseline Array observations of the 22.2GHz H_2_O maser emission associated with the "water fountain" IRAS 18286-0959. We suggest...
  • NGC 2071 water masers

    We have mapped the water maser emission associated with the infrared centers IRS 1 and IRS 3 of the NGC 2071 IR star-forming region at four epochs over ~4 months with the Very...
  • 6.7GHz methanol maser emission survey

    We report the first results of a search for 6.7GHz methanol masers in the direction of 1399 IRAS objects north of declination -20{deg} with the flux densities greater than 100...
  • R Cas, o Cet, and R Leo 22GHz spectra

    We carry out decades-long single-dish monitoring of the variation in water-maser emission associated with the circumstellar envelopes (CSEs) of different types of evolved stars....
  • G358.93-0.03 22GHz H2O maser parameters

    The massive young stellar object (MYSO) G358.93-0.03-MM1 showed an extraordinary NIR/(sub)mm-dark and FIR-loud accretion burst closely associated with flares of several class II...
  • High-mass star-forming regions cyanopolyyne

    Cyanopolyynes (HC_2n+1_N, n=1,2,3), which are the linear carbon chain molecules, are precursors for the prebiotic synthesis of simple amino acids. They are important for...
  • Periodic flares in two 6.7GHz methanol masers

    Periodicity in the 6.7GHz methanol maser sources is a rare phenomenon discovered during long-term monitoring programs. Understanding underlying processes leading to periodic...
  • 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...
  • Class I methanol maser catalog

    We have revised the Astro Space Center catalog of Class I methanol masers detected in starforming regions (MMI/SFR), mainly at 44GHz, and created a new electronic version of the...
  • Methanol emission of isolated maser condensations

    The distribution of the radial velocities of class I methanol masers relative to the velocities of their parent molecular clouds is analyzed. This analysis is based on catalog...
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