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Ultracompact H II regions studies. II.
High spatial resolution radio continuum and 6.67-GHz methanol spectral line data are presented for methanol masers previously detected by Walsh et al. (1997, Cat. ). Methanol... -
Methanol maser of IRAS-selected sources
A survey of ultracompact (UC) HII regions has been carried out by searching for 6.669-GHz methanol maser emission from a sample of 535 IRAS-selected candidates. A total of 201... -
IRAS Galactic star-forming regions. II.
The results of the analysis of the occurrence of 22.2-GHz H_2_O maser emission in a sample of 1409 IRAS sources north of declination -30deg associated with star-forming regions... -
Methanol maser condensations in W 48
The methanol-line spectra in two maser condensations at velocities ~41 and ~45km/s in the star-forming region W 48 have been studied. Cone search capability for table... -
A 95 GHz Survey of Methanol Masers
A 95GHz survey of methanol emission in the 8_0_-7_1_A^+^ transition was conducted with the 20-m radio telescope at Onsala. Twenty-six new sources were detected in the emission... -
Thermal Methanol from 33 Clouds at 48 GHz
A search for thermal emission in the 1_0_-0_0_A^+^ methanol line was made at a frequency of 48.4GHz toward many celestial molecular clouds. The line was found in 33 clouds, and... -
Water fountain cand. from H_2_O masers (22.235GHz)
Water fountains (WFs) are thought to be objects in the morphological evolution of the circumstellar envelopes of low- and intermediate-mass evolved stars, transitioning from... -
IRAM 3mm, 2mm & 1.3mm obs. of star-forming regions
We carried out a spectral line survey of CH3OH toward a large sample of 175 high-mass star-forming regions in the 3mm, 2mm, and 1.3mm bands with the Institut de Radioastronomie... -
Statistical study of NEOWISE 6.7GHz methanol masers
We present a statistical study of infrared variability using the Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) database for a sample consisting of 1085... -
HC3N & N2H+ obs. toward 61 ultracompact HII regions
We conducted observations of multiple HC_3_N (J=10-9, 12-11, and 16-15) lines and the N_2_H^+^ (J=1-0) line toward a large sample of 61 ultracompact (UC) HII regions, through... -
Multiple maser transitions from G358.93-0.03 burst
The high-mass young stellar object G358.93-0.03 underwent an accretion burst during the period from 2019 January to June. Given its extraordinary conditions, a number of new... -
VLBA obs. of masers in the Scutum Spiral Arm
As part of the Bar and Spiral Structure Legacy (BeSSeL) Survey, we have used the Very Long Baseline Array (VLBA) to measure 16 trigonometric parallaxes and proper motions of... -
NH3 obs. (~23.7GHz) of SCOPE dense objects
The Planck Catalogue of Galactic Cold Clumps provides an all-sky sample of potential star-forming regions based on the submillimeter emission of their dust content. Around 1000... -
18cm OH masers VLA obs. toward 80 SFRs
Class I methanol masers (cIMMs) and 1720MHz OH masers are believed to arise from a common collisional pumping mechanism, and both trace shocked gas regions in supernova remnants... -
Survey of SiO maser emission in oxygen-rich stars
Circumstellar environments of oxygen-rich stars are among the strongest SiO maser emitters. Physical processes such as collisions, infrared pumping, and overlaps favor the... -
A 4-6GHz RRL survey in the Milky Way
We performed a radio recombination line (RRL) survey to construct a high-mass star-forming region (HMSFR) sample in the Milky Way based on the all-sky Wide-Field Infrared Survey... -
44 and 95GHz observations of class I methanol masers
We report a simultaneous 44 and 95GHz class I methanol maser survey toward 144 sources from the 95GHz class I methanol maser catalog. The observations were made with the three... -
Accurate OH maser positions from SPLASH. III.
We present high spatial resolution observations of ground-state OH masers achieved with the Australia Telescope Compact Array (ATCA). These observations targeted 253 pointing... -
6.7GHz methanol masers & RRLs in MSX regions
We report a systematic survey of a 6.7GHz Class II methanol maser toward a sample of 448 sources selected from the Red Midcourse Space Experiment Source catalog. These sample... -
VLA observations of the Central Molecular Zone
We present new observations of the C-band continuum emission and masers to assess high-mass (>8M_{sun}) star formation at early evolutionary phases in the inner 200pc of the...
