M. G. Hoare
A5030526063- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Molecular Spectroscopy and Structure
- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Spectroscopy and Laser Applications
- Atmospheric Ozone and Climate
- Geophysics and Gravity Measurements
- Calibration and Measurement Techniques
- Scientific Research and Discoveries
- Solar and Space Plasma Dynamics
- Atomic and Molecular Physics
- Space Science and Extraterrestrial Life
- Ionosphere and magnetosphere dynamics
- Space Exploration and Technology
- Adaptive optics and wavefront sensing
- Spacecraft and Cryogenic Technologies
- History and Developments in Astronomy
- X-ray Spectroscopy and Fluorescence Analysis
University of Leeds
2015-2025
Max Planck Institute for Radio Astronomy
2015
Max Planck Society
1995-2015
University of Manchester
2006
Max Planck Institute for Astronomy
1995-1996
University College London
1988-1996
Biochemical Society
1996
University of Oxford
1991-1995
We present the first results from science demonstration phase for Hi-GAL survey, <i>Herschel<i/> key program that will map inner Galactic plane of Milky Way in 5 bands. outline our data reduction strategy and some highlights on two observed 2° × tiles approximately centered at <i>l<i/> = 30° 59°. The regions are extremely rich intense highly structured extended emission which shows a widespread organization filaments. Source SEDs can be built hundreds objects fields, physical parameters...
Hi-GAL, the Herschel infrared Galactic Plane Survey, is an Open Time Key Project of Space Observatory. It will make unbiased photometric survey inner plane by mapping a 2° wide strip in longitude range ∣l∣ < 60° five wavebands between 70 μm and 500 μm. The aim Hi-GAL to detect earliest phases formation molecular clouds high-mass stars use optimum combination wavelength coverage, sensitivity, strategy, speed deliver homogeneous census star-forming regions cold structures interstellar medium....
The UKIDSS Galactic Plane Survey (GPS) is one of the five near infrared Public Legacy Surveys that are being undertaken by consortium, using Wide Field Camera on United Kingdom Infrared Telescope. It surveying 1868 sq.deg. northern and equatorial plane at latitudes -5<b></b>
Context. The ESO public survey VISTA variables in the Vía Láctea (VVV) started 2010. VVV targets 562 sq. deg Galactic bulge and an adjacent plane region is expected to run for about five years.
(Abridged) We present the first public release of high-quality data products (DR1) from Hi-GAL, {\em Herschel} infrared Galactic Plane Survey. Hi-GAL is keystone a suite continuum surveys near-IR to radio, and covers five wavebands at 70, 160, 250, 350 500 micron, encompassing peak spectral energy distribution cold dust for 8 < T 50K. This inner Milky Way in longitude range 68{\deg} > l -70{\deg} |b|<1{\deg} latitude strip. Photometric maps have been produced with ROMAGAL pipeline, that...
By matching infrared-selected, massive young stellar objects (MYSOs) and compact HII regions in the RMS survey to clumps found submillimetre ATLASGAL survey, we have identified ~1000 embedded stars between 280\degr < $\ell$ 350\degr 10degr 60\degr with |b|<1.5degr. Combined an existing sample of radio-selected methanol masers regions, result is a catalogue ~1700 within ~1300 located across inner Galaxy, containing three observationally distinct subsamples, methanol-maser, MYSO HII-region...
We have conducted a Galactic plane survey of methanol masers at 6668 MHz using seven-beam receiver on the Parkes telescope. Here we present results from first part, which provides sensitive unbiased coverage large region around Centre. Details are given for 183 maser sites in longitude range 345° through Centre to 6°. Within 6° Centre, found 88 sites, more than half (48) new discoveries. The confined narrow latitude range, indicative many sources distance and beyond, thin disc population;...
We present first results of the H_2O Southern Galactic Plane Survey (HOPS), using Mopra radiotelescope with a broad band backend and beam size about 2'. have observed 100 square degrees southern plane at 12mm (19.5 to 27.5GHz), including spectral line emission from water masers, multiple metastable transitions ammonia, cyanoacetylene, methanol radio recombination lines. In this paper, we report on characteristics survey maser emission. find 540 which 334 are new detections. The strongest is...
We present the Red MSX Source (RMS) Survey, largest statistically selected catalog of young massive protostars and HII regions to date. outline construction using mid near infrared color selection, as well detailed follow up work at other wavelengths, higher spatial resolution in infrared. show that within adopted selection bounds we are more than 90% complete for protostellar population, with a positional accuracy exciting source better 2 arcseconds. briefly summarize some results can be...
The Red MSX Source (RMS) survey has identified a sample of ~1200 massive young stellar objects (MYSOs), compact and ultra HII regions from ~2000 2MASS colour selected sources. We have used the 100 m Green Bank telescope to search for 22-24 GHz water maser ammonia (1,1), (2,2) (3,3) emission towards ~600 RMS sources located within northern Galactic plane. 308 H2O masers which corresponds an overall detection rate ~50%. Abridged: detect 479 these stars, ~80%. Ammonia is excellent probe high...
We present an analysis of wind-blown, parsec-sized, mid-infrared bubbles and associated star formation using the GLIMPSE IRAC, MIPSGAL MIPS, MAGPIS VLA surveys. Three from Churchwell et al. catalog were selected. The relative distribution ionized gas (based on 20 cm emission), PAH emission 8 μm, 5.8 lack 4.5 μm hot dust (24 emission) is compared. At center each bubble there a region containing surrounded by PAHs. identify likely source(s) stellar wind ionizing flux producing based SED...
The CORNISH project is the highest resolution radio continuum survey of Galactic plane to date. It 5 GHz part a series multi-wavelength surveys that focus on northern GLIMPSE region (10 deg < l 65 deg), observed by Spitzer satellite in mid-infrared. Observations with Very Large Array B and BnA configurations have yielded 1.5" Stokes I map root-mean-squared noise level better than 0.4 mJy/beam. Here we describe data-processing methods data characteristics, present new, uniform catalogue...
<i>Context. <i/>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 objects (MYSOs). We have identified ~2000 MYSO candidates located throughout the Galaxy by comparing colours and 2MASS point sources those known MYSOs. The aim these follow-up observations identify other with similar such as ultra compact (UC) HII regions, evolved stars planetary nebulae (PNe) distinguish between...
We describe the motivation, design, and implementation of CORNISH survey, an arcsecond-resolution radio continuum survey inner galactic plane at 5 GHz using Very Large Array (VLA). It is a blind coordinated with northern Spitzer GLIMPSE I region covering 10° < l 65° |b| 1° similar resolution. discuss in detail strategy that we employed to control shape synthesised beam across this which covers wide range fairly low declinations. Two snapshots separated by 4h kept elongation less 1.5 over 75%...
A new seven-beam 6–7 GHz receiver has been built to survey the Galaxy and Magellanic Clouds for newly forming high-mass stars that are pinpointed by strong methanol maser emission at 6668 MHz. The was jointly constructed Jodrell Bank Observatory (JBO) Australia Telescope National Facility (ATNF) allows simultaneous coverage 6035 It successfully commissioned Parkes in 2006 January is now being used conduct Parkes–Jodrell multibeam of Milky Way. This will be first systematic entire Galactic...
Hi-GAL is a large-scale survey of the Galactic plane, performed with Herschel in five infrared continuum bands between 70 and 500 $\mu$m. We present band-merged catalogue spatially matched sources their properties derived from fits to spectral energy distributions (SEDs) heliocentric distances, based on photometric catalogs presented Molinari et al. (2016a), covering portion plane $-71.0^{\circ}< \ell < 67.0^{\circ}$. The contains 100922 regular SED, 24584 which show $\mu$m counterpart are...
We present Atacama Large Millimeter/submillimeter Array line and continuum observations at 1.2 mm with ∼03 resolution that uncover a Keplerian-like disk around the forming O-type star AFGL 4176. The emission from 1.21 (source mm1) has deconvolved size of 870 ± 110 AU × 330 300 arises structure ∼8 M⊙ in mass, calculated assuming dust temperature 190 K. first-moment maps, pixel-to-pixel modeling, local thermodynamic equilibrium (LTE), position–velocity diagrams CH3CN J = 13–12 K-line all show...
There is currently no accepted theoretical framework for the formation of most massive stars, and manner in which protostars continue to accrete grow mass beyond \sim10Msun still a controversial topic. In this study we use several prescriptions stellar accretion description Galactic gas distribution simulate luminosities spatial protostellar population Galaxy. We then compare observables each simulation results Red MSX Source (RMS) survey, recently compiled database young objects. find that...
We have used the well-selected sample of ∼1750 embedded, young, massive stars identified by Red MSX Source (RMS) survey to investigate Galactic distribution recent star formation. present molecular line observations for ∼800 sources without existing radial velocities. describe various methods assign distances extracted from literature and solve distance ambiguities towards approximately 200 located within solar circle using archival H i data. These are calculate bolometric luminosities...
We present a complete sample of molecular clumps containing compact and ultra-compact (UC) HII regions between \ell=10\degr 60\degr\ $|b|<1\degr, identified by combining the ATLASGAL submm CORNISH radio continuum surveys with visual examination archival infrared data. Our is to optically thin, UCHII driven zero age main sequence star spectral type B0 or earlier embedded within 1,000 Msun clump. In total we identify 213 regions, associated 170 clumps. Unambiguous kinematic distances are...
We present a determination of the luminosity functions massive young stellar objects (MYSOs) and compact (C)HII regions within Milky Way Galaxy using large, well-selected sample these sources identified by Red MSX Source (RMS) survey. The MYSO function decreases monotonically such that there are few with $L\gtrsim 10^{5}$Lsol, whilst CHII detected up to ~10$^{6}Lsol. lifetimes phases also calculated as comparison for local main-sequence OB stars. These indicate phase has duration ranging...
We have observed 99 mid-infrared-bright, massive young stellar objects and compact HII regions drawn from the Red MSX source (RMS) survey in J=3$-$2 transition of $^{12}$CO $^{13}$CO, using James Clerk Maxwell Telescope. 89 targets are within 6 kpc Sun, covering a representative range luminosities core masses. These constitute relatively unbiased sample bipolar molecular outflows associated with star formation. Of these, 59, 17 13 sources (66, 19 15 percent) found to outflows, show some...
Context. Circumstellar discs around massive stars could mediate the accretion onto star from infalling envelope, and minimize effects of radiation pressure. Despite such a crucial role, only few convincing candidates have been provided for deeply embedded O-type (proto)stars.
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 stellar objects H ii regions. Of these, 26 sources are classified as ionized jets (12 which candidates), 2 ambiguous or disc winds, 1 a disc-wind, 14 regions were unable to be categorized. Classification is based upon morphology, radio flux spectral index, in conjunction previous observational results other...