Current Position
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Currently, I am an Assistant Professor of Physics (tenure-track) at
Penn State Worhthington Scranton campus
located in Dunmore, North East Pennsylvania. I teach both physics and astronomy
courses. My primary research is in astrophysics, massive stars in
particular. Any interested student may contact me to pursue a research
project.
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Current Research
I have created a separate webpage that discusses my
current research.
Current Teaching
Click here to access the pages for
current courses I am teaching..
PhD Research
I was a graduate student at the
Department of Physics and Astronomy (DPA) of the University of Delaware.
I completed my PhD (Fall 2002) under the advisement of
Prof. Stan Owocki,
a faculty member at Bartol
Research Institute which holds joint PhD program with
DPA. The subject of my thesis was the effect of rotation and magnetic fields
on the winds of hot stars, stars of type so called O and B.
PhD Thesis
You can downolad a complete
pdf version of my thesis (ca 25 MB) which can be used as an introduction
to line-driven hot-star winds. If you are making a hard copy, you might have
difficulties printing some of the large color-scale figures, in which case
print them separately. For those with slow links, I put a copy of the
thesis without figures (0.5 MB).
Curriculum Vitae (CV)
You can download my CV in pdf version.
Selected Publications/Preprints:
* Naze, Y., ud-Doula, A., Spano, M., Rauw, G., De Becker, M. and Walborn, N. R,
"New findings on the prototypical Of?p stars",
A&A, 2010, in press .
* Townsend, R. H. D., Oksala, M. E., Cohen, D. H., Owocki, S. P. and ud-Doula, A.,
"Discovery of Rotational Braking in the Magnetic
Helium-strong Star Sigma Orionis E", Astrophysical Journal Letters, 2010.
* Naze, Y, Rauw, G. and ud-Doula, A,
"Hot
and cool: two emission-line stars with contrasting behaviours
in the same XMM-Newton field ", A&A, 2010.
* ud-Doula, A., Owocki, S. and Townsend, R.H.D,
"Dynamical Simulations of Magnetically Channeled Line-Driven Stellar
Winds: III. Angular Momentum Loss and Stellar Spindown'', Monthly Notices of RAS, 2009.
* ud-Doula, A., Owocki, S. and Townsend, R.H.D,
"Dynamical Simulations of
Magnetically Channeled Line-Driven Stellar Winds: II.The Effects of Field-Aligned
Rotation'', Monthly Notices of RAS, 2008, 385, 97.
* Townsend, R.H.D, Owocki, S. and ud-Doula, A.,
"A Rigid-Field Hydrodynamics approach to modeling the
magnetospheres of massive stars", Monthly Notices of RAS, 2007, Vol 382.
*Owocki, S., Townsend, R., ud-Doula, A., 2007,
"Modeling the magnetospheres of luminous stars: Interactions
between supersonic radiation-driven winds and stellar magnetic fields"
, Physics of Plasmas, 14, 2007.
* ud-Doula, A., Townsend, R. and Owocki, S., 2006,
"Centrifugal Breakout of Magnetically Confined Line-Driven Stellar Winds"
, ApJL, April 1, 2006.
* John C. Hayes, Michael L. Norman, James O. Bordner, Pak Shing Li, Robert
A. Fiedler, Stephen E. Clark, Asif ud-Doula, and Mordecai-Mark MacLow,
"Simulating Radiating and Magnetized Flows in Multi-Dimensions with ZEUS-MP"
,
ApJS, 165, 2006.
* ApJ paper (Aug 2005), with Gagne et al. :
"Chandra HETGS Multi-Phase Spectroscopy
of the Young Magnetic O Star Theta 1 Orionis C".
* ApJ Jan 2004 paper: "The Effect of Magnetic Field
Tilt and Divergence on the Mass Flux and Flow Speed in a Line-Driven Stellar
Wind".
* International Conference on Magnetic Fields in O, B and A Stars, Mmabatho,
South Africa (2002):
"The Effects of Magnetic
Fields on Line-Driven Hot-Star Winds".
* International Conference on Magnetic Fields in O, B and A Stars, Mmabatho,
South Africa (2002):
"Magnetic Spin-Up
of Line-Driven Stellar Winds".
* IAU Symposium No. 215, Stellar Rotation, Cancun, Mexico (2002):
"The Effects of Field-Aligned Rotation
on Magnetically Channeled Line-Driven Winds".
* ApJ paper (September 1, 2002):
"Dynamical Simulations of Magnetically
Channeled Line-Driven
Stellar Winds: I. Isothermal, Nonrotating, Radially Driven Flow".
* Poster presented in AAS meeting in Washigton D.C., Jan 2002:
powerpoint file
* Paper presented at
X-rays
at Sharp Focus: Chandra Science Symposium (2002) with Marc Gagne
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