198 citations · 808 across the 41 of their papers we have counts for
9 papers · 1 filter
Phase-dependent X-ray observations of the beta Lyrae system: No eclipse in the soft band
R. Ignace, L. M. Oskinova, W. L. Waldron +2
We report on observations of the eclipsing and interacting binary beta Lyrae from the Suzaku X-ray telescope. This system involves an early B star embedded in an optically and geom…
The Dual-Axis Circumstellar Environment of the Type IIn Supernova 1997eg
Jennifer L. Hoffman, Douglas C. Leonard, Ryan Chornock +3
We present multi-epoch spectral and spectropolarimetric observations of the Type IIn supernova (SN) 1997eg that indicate the presence of a flattened disk-like concentration of circ…
Supernova Polarization and the Type IIn Classification
Jennifer L. Hoffman
While the members of the Type IIn category of supernovae are united by the presence of strong multicomponent Balmer emission lines in their spectra, they are quite heterogeneous wi…
A non-spherical core in the explosion of supernova SN 2004dj
Douglas C. Leonard, Alexei V. Filippenko, Mohan Ganeshalingam +9
An important and perhaps critical clue to the mechanism driving the explosion of massive stars as supernovae is provided by the accumulating evidence for asymmetry in the explosion…
The Orbit and Occultations of KH 15D
Joshua N. Winn, Catrina M. Hamilton, William J. Herbst +4
The unusual flux variations of the pre-main-sequence binary star KH 15D have been attributed to occultations by a circumbinary disk. We test whether or not this theory is compatibl…
Interstellar Polarization and the Position Angle Orientations of Seyfert 1 Galaxies
Jennifer L. Hoffman, Ryan Chornock, Douglas C. Leonard +1
We comment on recent spectropolarimetric studies that compare the observed polarization position angles (PAs) of Seyfert 1 galaxies near H alpha with the observed orientations of t…
The Effect of Multiple Scattering on the Polarization from Binary Star Envelopes. I. Self- and Externally Illuminated Disks
Jennifer L. Hoffman, Barbara A. Whitney, Kenneth H. Nordsieck
We present the results of a Monte Carlo radiative transfer code that calculates the polarization produced by multiple Thomson scattering and variable absorptive opacity in a circum…
Spectroscopic and Spectropolarimetric Observations of V838 Mon
John P. Wisniewski, Nancy D. Morrison, Karen S. Bjorkman +5
The spectroscopic and spectropolarimetric variability of the peculiar variable V838 Monocerotis during the brighter phases of its multiple outbursts in 2002 is presented. Significa…
Spectropolarimetric Clues to the Structure and Evolutionary Status of MWC 349A
Jill M. Meyer, Kenneth H. Nordsieck, Jennifer L. Hoffman
We present visible-wavelength spectropolarimetric measurements of the emission-line star MWC 349A and its close optical companion MWC 349B, conducted with the HPOL spectropolarimet…