Early Stage Researcher Position in Team 5
Location of Appointment
Durham (UK)
Team Leader (contact person)
Prof. D.R. Flower
Address
Physics Department, Durham University
Durham DH1 3LE
UK
e-mail
<david.flower@durham.ac.uk>
Telephone
+44 (0)191 334 3625
Fax
+44 (0)191 334 5823
Various URL
http://www.dur.ac.uk/physics/research/atomic /media.php
http://www.ias.u-psud.fr
Category of Position
Early Stage Researcher
Duration of Appointment (in months)
36
Starting Date
01-10-2005
Requirements with respect to candidate :
physics or astronomy degree
Title of Research Project
Simulations of the spectra of shocks in regions of star formation
PDF Version of advert
J5.pdf
Abstract of Research Project
Abstract of Research Project:
An opportunity exists to study for a Ph.D. degree at the University of Durham (under the direction of Prof. David Flower), with secondment at the Institut d'Astrophysique Spatiale, Orsay, France (under the direction of Prof. Guillaume des Forêts). The thesis will be concerned with the simulation of the spectra of jets in regions of star formation. The mechanisms of excitation of the lines by shock waves will be studied, and line intensities and profiles will be calculated. Species such as H2, SiO, CO, H2O, SO and SO2 will be considered, with a view to interpreting currently available observations and to making predictions for the Herschel and ALMA observing facilities.
The research programme will require the use of a sophisticated model of shock propagation, coupled with a treatment of radiative line transfer by means of the Large Velocity Gradient (LVG) approximation. The intention is to simulate the `bow' shock structures which are frequently observed along jets. Molecular data relating to the collisional excitation of the emitting levels, which will become available during the lifetime of the `Molecular Universe' RTN, will be incorporated in the model.
The graduate student will study in the Physics Department of the University of Durham. Students are expected to attend lectures and to contribute to the programme of research seminars, with a seminar every week in physics and one on more general physics topics (many more seminars are available in the Departments of Physics and Chemistry). Furthermore, the University of Durham provides a structured modular training programme to support the personal and career development of graduate students.
The position is available immediately, but a start date up to 1 October 2005 can be envisaged. Applications should be made to Prof. David Flower, Physics Department, South Road, Durham DH1 3LE, UK (david.flower@dur.ac.uk), preferably by e-mail and attaching a full CV, before 31 March 2005. Further information can be obtained directly from david.flower@dur.ac.uk
Significant References :
  • 1. The influence of grains on the propagation and structure of C-type shock waves in interstellar molecular clouds D. R. Flower and G. Pineau des Forêts, MNRAS, 343, 390-400 (2003)
  • 2. The contribution of J-type shocks to the H2 emission from molecular outflow sources D. R. Flower, J. Le Bourlot, G. Pineau des Forêts and S. Cabrit, MNRAS, 341, 70-80 (2003)
  • 3. New determinations of the critical velocities of C-type shock waves in dense molecular clouds J. Le Bourlot, G. Pineau des Forêts, D. R. Flower and S. Cabrit, MNRAS, 332, 985-993 (2002)