Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Hibbard, Joshua"'
In 21-cm experimental cosmology, accurate characterization of a radio telescope's antenna beam response is essential to measure the 21-cm signal. Computational electromagnetic (CEM) simulations estimate the antenna beam pattern and frequency response
Externí odkaz:
http://arxiv.org/abs/2408.16135
Accurate detection of the cosmological 21-cm global signal requires galactic foreground models which can remove power over ~$10^6$. Although foreground and global signal models unavoidably exhibit overlap in their vector-spaces inducing bias error in
Externí odkaz:
http://arxiv.org/abs/2304.09959
Autor:
Bale, Stuart D., Bassett, Neil, Burns, Jack O., Jones, Johnny Dorigo, Goetz, Keith, Hellum-Bye, Christian, Hermann, Sven, Hibbard, Joshua, Maksimovic, Milan, McLean, Ryan, Monsalve, Raul, O'Connor, Paul, Parsons, Aaron, Pulupa, Marc, Pund, Rugved, Rapetti, David, Rotermund, Kaja M., Saliwanchik, Ben, Slosar, Anze, Sundkvist, David, Suzuki, Aritoki
The Lunar Surface Electromagnetics Explorer 'LuSEE Night' is a low frequency radio astronomy experiment that will be delivered to the farside of the Moon by the NASA Commercial Lunar Payload Services (CLPS) program in late 2025 or early 2026. The pay
Externí odkaz:
http://arxiv.org/abs/2301.10345
Autor:
Hibbard, Joshua J., Mirocha, Jordan, Rapetti, David, Bassett, Neil, Burns, Jack O., Tauscher, Keith
Upcoming ground and space-based experiments may have sufficient accuracy to place significant constraints upon high-redshift star formation, Reionization, and dark matter (DM) using the global 21-cm signal of the intergalactic medium. In the early un
Externí odkaz:
http://arxiv.org/abs/2201.02638
Autor:
Bassett, Neil, Rapetti, David, Tauscher, Keith, Nhan, Bang D., Bordenave, David D., Hibbard, Joshua J., Burns, Jack O.
We present an investigation of the horizon and its effect on global 21-cm observations and analysis. We find that the horizon cannot be ignored when modeling low frequency observations. Even if the sky and antenna beam are known exactly, forward mode
Externí odkaz:
http://arxiv.org/abs/2106.02153
Autor:
Tauscher, Keith, Rapetti, David, Nhan, Bang D., Handy, Alec, Bassett, Neil, Hibbard, Joshua, Bordenave, David, Bradley, Richard F., Burns, Jack O.
All 21-cm signal experiments rely on electronic receivers that affect the data via both multiplicative and additive biases through the receiver's gain and noise temperature. While experiments attempt to remove these biases, the residuals of their imp
Externí odkaz:
http://arxiv.org/abs/2105.01672
We present a methodology for ensuring the robustness of our analysis pipeline in separating the global 21-cm hydrogen cosmology signal from large systematics based on singular value decomposition (SVD) of training sets. We show how traditional goodne
Externí odkaz:
http://arxiv.org/abs/2011.01242
In order to characterize and model the beam-weighted foreground for global 21-cm signal experiments, we present a methodology for generating basis eigenvectors that combines analytical and observational models of both the galactic spectral index and
Externí odkaz:
http://arxiv.org/abs/2011.00549
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