1 code implementation • 9 Oct 2022 • He Jia, Hong-Ming Zhu, Ue-Li Pen
The angular momentum of galaxies (galaxy spin) contains rich information about the initial condition of the Universe, yet it is challenging to efficiently measure the spin direction for the tremendous amount of galaxies that are being mapped by the ongoing and forthcoming cosmological surveys.
no code implementations • 9 Feb 2021 • Laura Wolz, Alkistis Pourtsidou, Kiyoshi W. Masui, Tzu-Ching Chang, Julian E. Bautista, Eva-Maria Mueller, Santiago Avila, David Bacon, Will J. Percival, Steven Cunnington, Chris Anderson, Xuelei Chen, Jean-Paul Kneib, Yi-Chao Li, Yu-Wei Liao, Ue-Li Pen, Jeffrey B. Peterson, Graziano Rossi, Donald P. Schneider, Jaswant Yadav, Gong-Bo Zhao
We present the joint analysis of Neutral Hydrogen (HI) Intensity Mapping observations with three galaxy samples: the Luminous Red Galaxy (LRG) and Emission Line Galaxy (ELG) samples from the eBOSS survey, and the WiggleZ Dark Energy Survey sample.
Cosmology and Nongalactic Astrophysics
1 code implementation • 12 Jan 2021 • Daniel Baker, Walter Brisken, Marten H. van Kerkwijk, Robert Main, Ue-Li Pen, Tim Sprenger, Olaf Wucknitz
As a result, measuring variations in the curvature over the course of a year, or the orbital period for pulsars in binaries, can constrain properties of the screen and pulsar.
Instrumentation and Methods for Astrophysics
no code implementations • 14 Jan 2019 • CHIME/FRB Collaboration, :, Mandana Amiri, Kevin Bandura, Mohit Bhardwaj, Paula Boubel, Michelle M. Boyce, Patrick J. Boyle, Charanjot Brar, Maya Burhanpurkar, Pragya Chawla, Jean F. Cliche, Davor Cubranic, Meiling Deng, Nolan Denman, Matthew Dobbs, M. Fandino, Emmanuel Fonseca, Bryan M. Gaensler, Adam J. Gilbert, Utkarsh Giri, Deborah C. Good, Mark Halpern, David Hanna, Alexander S. Hill, Gary Hinshaw, C. Höfer, Alexander Josephy, Victoria M. Kaspi, Thomas L. Landecker, Dustin A. Lang, Kiyoshi W. Masui, Ryan Mckinven, Juan Mena-Parra, Marcus Merryfield, Nikola Milutinovic, Charles Moatti, Arun Naidu, Laura B. Newburgh, Cherry Ng, Chitrang Patel, Ue-Li Pen, Tristan Pinsonneault-Marotte, Ziggy Pleunis, Masoud Rafiei-Ravandi, Scott M. Ransom, Andre Renard, Paul Scholz, J. R. Shaw, Seth R. Siegel, Kendrick M. Smith, Ingrid H. Stairs, Shriharsh P. Tendulkar, Ian Tretyakov, Keith Vanderlinde, Prateek Yadav
Emission in multiple events is seen down to 400 MHz, the lowest radio frequency to which we are sensitive.
High Energy Astrophysical Phenomena
1 code implementation • 12 Nov 2018 • Dongzi Li, Hong-Ming Zhu, Ue-Li Pen
We discuss the possibility of studying diffuse baryon distributions with kinematic Sunyaev-Zel'dovich (kSZ) effect by correlating cosmic microwave background (CMB) temperature fluctuations with density fluctuations from 21\, cm intensity mapping (IM).
Cosmology and Nongalactic Astrophysics
1 code implementation • 9 Jan 2014 • J. Richard Shaw, Kris Sigurdson, Michael Sitwell, Albert Stebbins, Ue-Li Pen
In this paper we continue to develop the m-mode formalism, a technique for efficient and optimal analysis of wide-field transit radio telescopes, targeted at 21 cm cosmology.
Cosmology and Nongalactic Astrophysics Instrumentation and Methods for Astrophysics
1 code implementation • 7 Feb 2013 • Ue-Li Pen, Yuri Levin
In this picture, the parts of warm ionized interstellar medium that are responsible for the scintillations are relatively quiescent, with scintillation and scattering resulting from weak waves propagating along magnetic domain boundary current sheets, which are both expected from helicity conservation and have been observed in numerical simulations.
Astrophysics of Galaxies
1 code implementation • 2 Feb 2013 • J. Richard Shaw, Kris Sigurdson, Ue-Li Pen, Albert Stebbins, Michael Sitwell
In this paper we describe the spherical harmonic transit telescope, a novel formalism for the analysis of transit radio telescopes.
Cosmology and Nongalactic Astrophysics