Dr Una Hwang

Astrophysics Science Division
NASA/GSFC
Code 662, Astrophysics Science Division
Greenbelt, MD 20771

tel: 301-286-3632
fax: 301-286-1684
e-mail: Una.Hwang-1 @ nasa.gov

Present Position

Research Scientist (Johns Hopkins University)

Brief Bio

Previous Positions:

1996-2004 Research Associate, University of Maryland
1998 Lecturer in Astronomy, University of Pennsylvania
1997 Lecturer in Astronomy, University of Maryland
1994-1996 NRC/NAS Research Fellow at Goddard Space Flight Center
1988-1994 Research Assistant, Dept of Physics at MIT

Educational Background

PhD in Physics, MIT 1994
(Thesis Title: X-ray Studies of Supernova Remnants,
Thesis Advisor: Professor Claude Canizares)

SB in Physics, MIT 1988

Research Interests

X-ray imaging and spectroscopy; Supernova remnants; Nucleosynthesis and Abundances

Current Projects

Chandra X-ray spectra as probes of explosion and nucleosynthesis in Cassiopeia A

Chandra imaging and spectroscopy of young remnants

Shock interactions in evolved remnants

Coronal element abundances in flaring stars

Suzaku Science Working Group

Selected Publications

"X-ray Emitting Ejecta in Puppis A Observed with Suzaku"
U. Hwang, R. Petre, & K. A. Flanagan 2008, ApJ, 676, 378

"A Deep Chandra Observation of Kepler's Supernova Remnant: A Type Ia Remnant with Circumstellar Interaction"
S. P. Reynolds, K. J. Borkowski, U. Hwang, J. P. Hughes, C. Badenes, J. M. Laming, & J. M. Blondin 2007, ApJL, 668, L135

"The X-ray Structure and Spectrum of the Pulsar Wind Nebula Surrounding PSR B0540-693"
R. Petre, U. Hwang, S. S. Holt, S. Safi-Harb, & R. M. Williams 2007, ApJ, 662, 988

"A New Young Galactic Supernova Remnant Containing a Compact Object: G15.9+0.2"
S. P. Reynolds, K. J. Borkowski, U. Hwang, I. Harrus, & R. Petre, 2006, ApJL, 652, L45

"Constraints on the Physics of Type Ia Supernovae from the X-ray Spectrum of the Tycho Supernova Remnant"
C. Badenes, K. J. Borkowski, J. P. Hughes, U. Hwang, & E. Bravo 2006, ApJ, 645, 1373

"The X-ray Emission of the Supernova Remnant W49B Observed with XMM-Newton"
M. Miceli, A. Decourchelle, J. Ballet, F. Bocchino, J. P. Hughes, U. Hwang, & R. Petre 2006, A&A, 453, 567

"The Polar Regions of Cassiopeia A: The Aftermath of a Gamma-Ray Burst?"
J. M. Laming, U. Hwang, B. Radics, G. Lekli, & E. Takacs 2006, ApJ, 644, 260

"Chandra X-ray Observation of a Mature Cloud-Shock Interaction in the Bright Eastern Knot Region of Puppis A"
U. Hwang, K. A. Flanagan, & R. Petre 2006, ApJ, 635, 355

"A Million-Second Chandra View of Cassiopeia A"
U. Hwang, J. M. Laming, et al. 2004, ApJL, 615, L117

"XMM-Newton Observation of Kepler's Supernova Remnant"
G. Cassam-Chenai, A. Decourchelle, J. Ballet, U. Hwang, J. P. Hughes, & R. Petre 2004, A&A, 414, 545

Publications at the ADS website.