289 citations · 2.6k across the 34 of their papers we have counts for
24 papers · 1 filter
ATLASGAL -- Relationship between dense star forming clumps and interstellar masers
S. J. Billington, J. S. Urquhart, C. König +10
We have used catalogues from several Galactic plane surveys and dedicated observations to investigate the relationship between various maser species and Galactic star forming clump…
The evolution of young HII regions
P. D. Klaassen, K. G. Johnston, J. S. Urquhart +6
High-mass stars form in much richer environments than those associated with isolated low-mass stars, and once they reach a certain mass, produce ionised (HII) regions. The formatio…
H2O Southern Galactic Plane Survey (HOPS): Paper III - Properties of Dense Molecular Gas across the Inner Milky Way
S. N. Longmore, A. J. Walsh, C. R. Purcell +22
The H2O Southern Galactic Plane Survey (HOPS) has mapped 100 square degrees of the Galactic plane for water masers and thermal molecular line emission using the 22-m Mopra telescop…
A search for ionized jets towards massive young stellar objects
S. J. D. Purser, S. L. Lumsden, M. G. Hoare +7
Radio continuum observations using the Australia telescope compact array at 5.5, 9.0, 17.0 and 22.8 GHz have detected free-free emission associated with 45 of 49 massive young stel…
Infrared dark clouds on the far side of the Galaxy
A. Giannetti, F. Wyrowski, S. Leurini +5
Context: Infrared dark clouds are the coldest and densest portions of giant molecular clouds. The most massive ones represent some of the most likely birthplaces for the next gener…
ATLASGAL --- Complete compact source catalogue: 280\degr\ 60\degr
J. S. Urquhart, T. Csengeri, F. Wyrowski +9
The APEX Telescope Large Area Survey of the Galaxy (ATLASGAL) is the largest and most sensitive systematic survey of the inner Galactic plane in the submillimetre wavelength regime…
ATLASGAL --- towards a complete sample of massive star forming clumps
J. S. Urquhart, T. J. T. Moore, T. Csengeri +12
By matching infrared-selected, massive young stellar objects (MYSOs) and compact HII regions in the RMS survey to massive clumps found in the submillimetre ATLASGAL survey, we have…
Molecular line mapping of the giant molecular cloud associated with RCW 106 - IV. Ammonia towards dust emission
Vicki Lowe, Maria R. Cunningham, James S. Urquhart +6
Here we report observations of the two lowest inversion transitions of ammonia with the 70-m Tidbinbilla radio telescope. They were conducted to determine the kinetic temperatures…
The RMS Survey: Galactic distribution of massive star formation
J. S. Urquhart, C. C. Figura, T. J. T. +6
Abridged: We have used the well-selected sample of ~1750 embedded, young, massive stars identified by the RMS survey to investigate the Galactic distribution of recent massive star…
The Red MSX Source Survey: the Massive Young Stellar Population of our Galaxy
S. L. Lumsden, M. G. Hoare, J. S. Urquhart +5
We present the Red MSX Source (RMS) Survey, the largest statistically selected catalog of young massive protostars and HII regions to date. We outline the construction of the catal…
ATLASGAL --- properties of compact HII regions and their natal clumps
J. S. Urquhart, M. A. Thompson, T. J. T. Moore +13
We present a complete sample of molecular clumps containing compact and ultra-compact (UC) HII regions between \ell=10\degr and 60\degr\ and $|b|<1\degr, identified by combining th…
Star formation in Galactic spiral arms and the inter-arm regions
D. J. Eden, T. J. T. Moore, L. K. Morgan +2
The line of sight through the Galactic Plane between longitudes l = 37.83 degr and l = 42.50 degr allows for the separation of Galactic Ring Survey molecular clouds into those that…
ATLASGAL --- Environments of 6.7\,GHz methanol masers
J. S. Urquhart, T. J. T. Moore, F. Schuller +7
Using the 870-m APEX Telescope Large Area Survey of the Galaxy (ATLASGAL), we have identified 577 submillimetre continuum sources with masers from the methanol multibeam (MMB) s…
The RMS Survey: Near-IR Spectroscopy of Massive Young Stellar Objects
H. D. B. Cooper, S. L. Lumsden, R. D. Oudmaijer +6
Near-infrared H- and K-band spectra are presented for 247 objects, selected from the Red MSX Source (RMS) survey as potential young stellar objects (YSOs). 195 (~80%) of the target…
The G305 star-forming complex: Embedded Massive Star Formation Discovered by Herschel Hi-GAL
A. Faimali, M. A. Thompson, L. Hindson +7
We present a Herschel far-infrared study towards the rich massive star- forming complex G305, utilising PACS 70, 160 μm and SPIRE 250, 350, and 500 μm observations from the Hi-GAL…
The H2O southern Galactic Plane Survey(HOPS): NH3 (1,1) and (2,2) catalogues
C. R. Purcell, S. N. Longmore, A. J. Walsh +19
The H2O Southern Galactic Plane Survey (HOPS) has mapped a 100 degree strip of the Galactic plane (-70deg > l > 30deg, |b| < 0.5deg) using the 22-m Mopra antenna at 12-mm wavelengt…
The Effect of Spiral Arms on Star Formation in the Galaxy
T. J. T. Moore, J. S. Urquhart, L. K. Morgan +1
We have examined the ratio between the integrated luminosity of massive young stellar objects detected by the Red MSX Source (RMS) survey and the mass of molecular clouds in the Ga…
The G305 star-forming complex: a wide-area radio survey of ultra-compact HII regions
L. Hindson, M. A. Thompson, J. S. Urquhart +3
We present wide-area radio continuum 5.5 and 8.8 GHz (5.5 and 3.4 cm) Australia Telescope Compact Array observations of the complex and rich massive star-forming region G305. The a…
The statistics of triggered star formation: an overdensity of massive YSOs around Spitzer bubbles
M. A. Thompson, J. S. Urquhart, T. J. T. Moore +1
We present a detailed statistical study of massive star formation in the environment of 322 Spitzer mid-infrared bubbles by using the RMS survey for massive Young Stellar Objects (…
The RMS Survey: Resolving kinematic distance ambiguities towards a sample of compact HII regions using HI absorption
J. S. Urquhart, M. G. Hoare, S. L. Lumsden +6
We present high-resolution HI data obtained using the Australia Telescope Compact Array to resolve the near/far distance ambiguities towards a sample of compact HII regions from th…
The H_2O southern Galactic Plane Survey (HOPS): I. Techniques and H_2O maser data
A. J. Walsh, S. L. Breen, T. Britton +19
We present first results of the H_2O Southern Galactic Plane Survey (HOPS), using the Mopra radiotelescope with a broad band backend and a beam size of about 2'. We have observed 1…
The G305 star forming complex: Wide-Area molecular mapping of NH3 and H2O masers
L. Hindson, M. A. Thompson, J. S. Urquhart +2
We present wide area radio (12 mm) Mopra Telescope observations of the complex and rich massive star forming region G305. Our goals are to determine the reservoir for star formatio…
Ammonia observations of bright-rimmed clouds: establishing a sample of triggered protostars
L. K. Morgan, C. C. Figura, J. S. Urquhart +1
We observed 42 molecular condensations within previously identified bright-rimmed clouds in the ammonia rotational inversion lines NH3 (1,1), (2,2), (3,3) and (4,4) using the Green…
The RMS Survey: 6 cm continuum VLA observations towards candidate massive YSOs in the northern hemisphere
J. S. Urquhart, M. G. Hoare, C. R. Purcell +6
(Abridged) Context: The Red MSX Source (RMS) survey is an ongoing multi-wavelength observational programme designed to return a large, well-selected sample of massive young stellar…