Tuesday 27 April @ 2:30pm in the JAC Library

Jason Hobson - Univ. of Victoria "High-Resolution Imaging of Herbig-Haro Outflows"

ABSTRACT: "This talk will describe a new, digital technique for measuring proper motion, discuss the results of the proper motion of three Herbig-Haro outflows (HH7-11, HH25&26, HH33&40), and 'show off' the quality of UFTI images."

Aaron Bernsen - Univ. of Victoria "Reduction and Analysis High Resolution Spectral Data"

ABSTRACT: "CGS4 echelle data of several Herbig-Haro (HH) outflows was reduced to elicit the radial velocity profiles of these HH objects. The seminar will include a brief description of the reduction methods; as well,prelimanary conclusions inferred from the results will be discussed. "

Ed Ross - Univ. of Victoria "Care and Feeding of Secondary Calibrators"

ABSTRACT: "Photometry data reduction on the secondary calibrators for the SCUBA detector on the JCMT have resulted in improvements in the values used to calibrate data at 450, 850 and 1350 microns. As well, results have been acquired for 350, 750 and 2000 microns. This presentation will touch on the justification for such a task, the problems that were encounteered during the data reduction process and a brief overview of the results. "

Jessica Powers - Univ. of Hawaii at Hilo "Evolution of Circumstellar Dust Disks around Low-Mass Protostars"

ABSTRACT: "During the initial stages of solar-type star formation, a circumstellar disk, out of which planets will eventually be born, is formed and grows while the surrounding dust/gas envelope shrinks and disperses. During this early stage, the disk is so deeply embedded in the cocooning envelope that it can only be studied using interferometers operating at millimeter/sub-millimeter wavelengths. Although these stages of evolution have been accepted for over a decade, many questions still remain. We have acquired observations of a complete sample of young solar-type protostars in the Taurus Molecular Complex using such techniques. Models of the interferometric data are currently being made in order to derive the size, morphology and orientation of the disk. These will be used to sudy the evolution of the circumstellar disk."