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After studying how line width depends on spatial scale in low-mass star-forming regions, we propose that " " dense cores ÏÏ & Benson represent an inner scale of a self-similar process that charac-(Myers 1983) terizes larger scale molecular clouds. In the process of coming to this conclusion, we deÐne four distinct types of line widthÈsize relation which(More)
  • Satoki Matsushita, Daisuke Iono, Glen R Petitpas, Richard C, Y Chou, Mark A Gurwell +9 others
  • 2008
We have used the Submillimeter Array (SMA) to make the first interferometric observations (beam size ∼ 1 ′′ , or ∼ 400 pc) of the 12 CO J=6-5 line and 435 µm (690 GHz) continuum emission toward the central region (half power field of view 17 ′′) of the nearby ultra-luminous infrared galaxy (ULIRG) Arp 220. These observations resolve the eastern and western(More)
Observations of comets and asteroids show that the solar nebula that spawned our planetary system was rich in water and organic molecules. Bombardment brought these organics to the young Earth's surface. Unlike asteroids, comets preserve a nearly pristine record of the solar nebula composition. The presence of cyanides in comets, including 0.01 per cent of(More)
  • Padeli P Papadopoulos, Ilana J Feain, Jeff Au, Wagg, David J Wilner
  • 2008
A new twist to an old story: HE 0450-2958, and the ULIRG→(optically bright QSO) transition hypothesis ABSTRACT We report on interferometric imaging of the CO J=1–0 and J=3–2 line emission from the controversial QSO/galaxy pair HE 0450–2958. The detected CO J=1–0 line emission is found associated with the disturbed companion galaxy not the luminous QSO, and(More)
Arcsecond-resolution spectral observations toward the protobinary system IRAS 16293-2422 at 344 and 354 GHz were conducted using the Submillime-ter Array. Complex organic molecules such as CH 3 OH and HCOOCH 3 were detected. Together with the rich organic inventory revealed, it clearly indicates the existence of two, rather than one, compact hot molecular(More)
We present ∼2 ′′-4 ′′ aperture synthesis observations of the circumstellar disk surrounding the nearby young star TW Hya in the CO J=2–1 and J=3–2 lines and associated dust continuum obtained with the partially completed Submillimeter Array. The extent and peak flux of the 230 and 345 GHz dust emission follow closely the predictions of the irradiated(More)
Planets form in the disks around young stars. Their formation efficiency and composition are intimately linked to the protoplanetary disk locations of "snow lines" of abundant volatiles. We present chemical imaging of the carbon monoxide (CO) snow line in the disk around TW Hya, an analog of the solar nebula, using high spatial and spectral resolution(More)
  • Kate Y L Su, M C Wyatt, G Kennedy, Moro-Martin Sibthorpe, A Lestrade, J.-F Ivison +64 others
  • 2012
1 PUBLICATIONS Submitted Papers 2. " Herschel Imaging of 61 Vir: implications for the prevalence of debris in low-mass planetary systems " 83. " Searching for Saturn's dust swarm: limits on the size distribution of irregular satellites from km to micron sizes " , 82. " Multiwavelength modelling of the β Leo debris disc: one, two or three planetesimal(More)
We present 0. ′′ 3 resolution observations of the disk around GM Aurigae with the Submillimeter Array (SMA) at a wavelength of 860 µm and with the Plateau de Bure Interferometer at a wavelength of 1.3 mm. These observations probe the distribution of disk material on spatial scales commensurate with the size of the inner hole predicted by models of the(More)
We present Submillimeter Array (SMA) observations of several deuterated species in the disk around the classical T Tauri star TW Hydrae at arcsecond scales, including detections of the DCN J=3–2 and DCO + J=3–2 lines, and upper limits to the 1 1,0 –1 0,1 transitions. We also present observations of the HCN J=3–2, HCO + J=3–2 and H 13 CO + J=4–3 lines for(More)