Cross-Correlation of Diffuse Synchrotron and Large-Scale Structures (2009)
Brown, Shea, Farnsworth, Damon, Rudnick, Lawrence
We explore for the first time the method of cross-correlation of radio synchrotron emission and tracers of large-scale structure in order to detect the diffuse IGM/WHIM. We performed a...
Observing the Evolution of the Universe (2009)
Aguirre, James, Amblard, Alexandre, Ashoorioon, Amjad, Baccigalupi, Carlo, Balbi, Amedeo, Bartlett, James, ...
How did the universe evolve? The fine angular scale (l>1000) temperature and polarization anisotropies in the CMB are a Rosetta stone for understanding the evolution of the universe. Through detailed...
An Objective Survey of Mpc-Scale Radio Emission in 0.03 (2009)
Rudnick, Lawrence, Lemmerman, Jeffrey
We have performed the the first census of Mpc-scale radio emission to include control fields and quantifiable upper limits for bright X-ray clusters in the range 0.03
Spitzer spectral mapping of supernova remnant Cassiopeia A (2009)
Smith, J. D. T., Rudnick, Lawrence, Delaney, Tracey, Rho, Jeonghee, Gomez, Haley, Kozasa, Takashi, ...
We present the global distribution of fine-structure infrared line emission in the Cassiopeia A supernova remnant using data from the Spitzer Space Telescope’s infrared spectrograph. We identify...
Detecting Magnetic Fields in Large-Scale Structure with Radio Polarization (2008)
Brown, Shea, Rudnick, Lawrence, Farnsworth, Damon
We present our attempts to detect magnetic fields in filamentary large-scale structure (LSS) by observing polarized synchrotron emission emitted by structure formation shocks. Little is known about...
Diffuse cluster-like radio emission in poor environments (2008)
Brown, Shea, Rudnick, Lawrence
We present a study of the spectral, polarimetric, morphological and environmental properties of the diffuse radio source 0809+39 using observations taken with the Westerbork Synthesis Radio...
Spitzer Spectral Mapping of Supernova Remnant Cassiopeia A (2008)
Smith, J. D. T., Rudnick, Lawrence, Delaney, Tracey, Rho, Jeonghee, Gomez, Haley, Kozasa, Takashi, ...
We present the global distribution of fine structure infrared line emission in the Cassiopeia A supernova remnant using data from the Spitzer Space Telescope's Infrared Spectrograph. We identify...
The Discovery of Diffuse Radio Polarization Structures in the NVSS (2008)
Rudnick, Lawrence, Brown, Shea
We have developed a method for recovering polarization structures from the NRAO Very Large Array Sky Survey (NVSS) on larger angular scales than the nominal 15 arc minute survey limit. The technique...
Extragalactic Jets: Reflections on the 2007 Alaska Conference (2007)
I review some of the important and exciting recent advances that were presented at the 2007 conference on Extragalactic Jets in Girdwood, Alaska, using as a framework the scientific challenges...
A Chandra Observation of Abell 13: Investigating the Origin of the Radio Relic (2007)
Juett, Adrienne M., Sarazin, Craig L., Clarke, Tracy E., Andernach, Heinz, Ehle, Matthias, Fujita, Yutaka, ...
We present results from the Chandra X-ray observation of Abell 13, a galaxy cluster that contains an unusual noncentral radio source, also known as a radio relic. This is the first pointed X-ray...
Extragalactic Radio Sources and the WMAP Cold Spot (2007)
Rudnick, Lawrence, Brown, Shea, Williams, Liliya R.
We detect a dip of 20-45% in the surface brightness and number counts of NVSS sources smoothed to a few degrees at the location of the WMAP cold spot. The dip has structure on scales of approximately...
Diffuse Radio Sources in Groups and Poor Clusters (2005)
Delain, Kisha M., Rudnick, Lawrence
We have discovered new diffuse radio sources likely associated with groups of galaxies at low redshift (0.01-0.04) and without apparent AGN by using the WENSS and WISH catalogs to perform an unbiased...
Unbiased Studies of Diffuse Extragalactic Radio Sources (2005)
Rudnick, Lawrence, Delain, Kisha M., Lemmerman, Jeffrey A.
We present an overview of unbiased studies of diffuse extragalactic radio sources. We use a previously developed filtering technique to remove compact sources from large surveys such as WENSS, WISH,...
Canonical Particle Acceleration in FRI Radio Galaxies (2005)
Young, Andrew, Rudnick, Lawrence, Katz, Debora, DeLaney, Tracey, Kassim, Namir E., Makishima, Kazuo
Matched resolution multi-frequency VLA observations of four radio galaxies are used to derive the asymptotic low energy slope of the relativistic electron distribution. Where available, low energy...
Observing Magnetic Fields on Large Scales (2004)
Observations of magnetic fields on scales up to several Mpc are important for understanding cluster and large-scale structure evolution. Our current census of such structures is heavily biased --...
A Million-Second Chandra View of Cassiopeia A (2004)
Hwang, Una, Laming, J. Martin, Badenes, Carles, Berendse, Fred, Blondin, John, Cioffi, Denis, ...
We introduce a million-second observation of the supernova remnant Cassiopeia A with the Chandra X-ray Observatory. The bipolar structure of the Si-rich ejecta (NE jet and SW counterpart) is clearly...
A Taxonomy of Extended Radio Sources in Clusters of Galaxies (2003)
Kempner, Joshua C., Blanton, Elizabeth L., Clarke, Tracy E., Ensslin, Torsten A., Johnston-Hollitt, Melanie, Rudnick, Lawrence
At the request of the conference attendees, we have compiled a classification of extended radio sources in clusters. These range from scales of tens of parsecs to over a megaparsec in scale, and...
Radio Spectral Index Variations and Physical conditions in Kepler's Supernova Remnant (2002)
DeLaney, Tracey, Koralesky, Barron, Rudnick, Lawrence, Dickel, John R.
A new epoch of VLA measurements of Kepler's supernova remnant was obtained to make accurate measurements of the radio spectral index variations and polarization. We have compared these new radio...
I present a brief overview of observational, modeling and theoretical issues related to ageing calculations based on spectral steepening. These include problems such as inhomogeneous magnetic fields,...
Multi-Resolution Imaging and Spectra of Extended Sources (1999)
I introduce a straightforward technique for the filtering of extended astronomical images into components of different spatial scales. For a positive original image, each component is positive...
Electron Population Aging Models for Wide-Angle Tails (1999)
Young, Andrew, Rudnick, Lawrence, Katz-Stone, Debora M., O'Donoghue, Aileen A.
Color-color diagrams have been useful in studying the spectral shapes in radio galaxies. At the workshop we presented color-color diagrams for two wide-angle tails, 1231+674 and 1433+553, and found...
The Supernova Remnant Cas A at Millimeter Wavelengths (1999)
Wright, Melvyn, Dickel, John, Koralesky, Barron, Rudnick, Lawrence
We used the BIMA array to map the supernova remnant Cas A from 28 to 87 GHz with 2'' to 7'' angular resolution. Data from 75 to 87 GHz, with 19 pointing centers were combined with single dish data to...
$10^{51}$ Ergs: The Evolution of Shell Supernova Remnants (1997)
Jones, T. W., Rudnick, Lawrence, Jun, Byung-Il, Borkowski, Kazimierz J., Dubner, Gloria, Frail, Dale A., ...
This paper reports on a workshop hosted by the University of Minnesota, March 23-26, 1997. It addressed fundamental dynamical issues associated with the evolution of shell supernova remnants and the...
A Comparison of X-ray and Radio Emission from the Supernova Remnant Cassiopeia A (1996)
Keohane, Jonathan W., Rudnick, Lawrence, Anderson, Martha C.
We compare the radio and soft X-ray brightness as a function of position within the young supernova remnant Cassiopeia A. A moderately strong correlation (r = 0.7) was found between the X-ray...