no code implementations • 4 Mar 2021 • Maya Mallaby-Kay, Zachary Atkins, Simone Aiola, Stefania Amodeo, J. Richard Bond, Erminia Calabrese, Grace E. Chesmore, Steve K. Choi, Kevin T. Crowley, Omar Darwish, Mark J. Devlin, Adriaan J. Duivenvoorden, Jo Dunkley, Simone Ferraro, Kyra Fichman, Patricio A. Gallardo, Joseph E. Golec, Yilun Guan, Dongwon Han, Matthew Hasselfield, J. Colin Hill, Matt Hilton, Renee Hlozek, Kevin M. Huffenberger, John P. Hughes, Brian J. Koopman, Thibaut Louis, Amanda MacInnis, Mathew S. Madhavacheril, Jeff McMahon, Kavilan Moodley, Sigurd Naess, Toshiya Namikawa, Federico Nati, Laura B. Newburgh, Michael D. Niemack, Lyman A. Page, Maria Salatino, Emmanuel Schaan, Alessandro Schillaci, Neelima Sehgal, Blake D. Sherwin, Cristobal Sifon, Sara Simon, Suzanne T. Staggs, Emilie R. Storer, Alexander van Engelen, Edward J. Wollack, Zhilei Xu
Two recent large data releases for the Atacama Cosmology Telescope (ACT), called DR4 and DR5, are available for public access.
Cosmology and Nongalactic Astrophysics
no code implementations • 1 Feb 2021 • Toshiya Namikawa, Anirban Roy, Blake D. Sherwin, Nicholas Battaglia, David N. Spergel
Since the power spectrum of the electron density fluctuations is constrained by the $\delta\tau$ auto spectrum, the temperature constraints should be only weakly model-dependent on the details of the electron distributions and should be statistically representative of the temperature in ionized bubbles during reionization.
PICO Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies
no code implementations • 1 Feb 2021 • Antón Baleato Lizancos, Anthony Challinor, Blake D. Sherwin, Toshiya Namikawa
We also show, by means of an analytic model, that the bias arising from the higher-point functions of the CIB itself ought to be negligible.
Cosmology and Nongalactic Astrophysics
1 code implementation • 28 Jul 2020 • Dongwon Han, Neelima Sehgal, Amanda MacInnis, Alexander van Engelen, Blake D. Sherwin, Mathew S. Madhavacheril, Simone Aiola, Nicholas Battaglia, James A. Beall, Daniel T. Becker, Erminia Calabrese, Steve K. Choi, Omar Darwish, Edward V. Denison, Jo Dunkley, Simone Ferraro, Anna E. Fox, Matthew Hasselfield, J. Colin Hill, Gene C. Hilton, Matt Hilton, Renée Hložek, Johannes Hubmayr, John P. Hughes, Arthur Kosowsky, Jeff Van Lanen, Thibaut Louis, Kavilan Moodley, Sigurd Naess, Toshiya Namikawa, Federico Nati, John P. Nibarger, Michael D. Niemack, Lyman A. Page, Bruce Partridge, Frank J. Qu, Alessandro Schillaci, David N. Spergel, Suzanne Staggs, Emilie Storer, Edward J. Wollack
Our results show that gravitational lensing of the microwave background is internally consistent within the framework of the standard cosmological model.
Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology
no code implementations • 8 Jul 2020 • Toshiya Namikawa
We present a formulation of observed number density fluctuations of gravitational-wave (GW) sources in a three dimensional space.
Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology
no code implementations • 2 Apr 2020 • Omar Darwish, Mathew S. Madhavacheril, Blake Sherwin, Simone Aiola, Nicholas Battaglia, James A. Beall, Daniel T. Becker, J. Richard Bond, Erminia Calabrese, Steve Choi, Mark J. Devlin, Jo Dunkley, Rolando Dünner, Simone Ferraro, Anna E. Fox, Patricio A. Gallardo, Yilun Guan, Mark Halpern, Dongwon Han, Matthew Hasselfield, J. Colin Hill, Gene C. Hilton, Matt Hilton, Adam D. Hincks, Shuay-Pwu Patty Ho, J. Hubmayr, John P. Hughes, Brian J. Koopman, Arthur Kosowsky, J. Van Lanen, Thibaut Louis, Marius Lungu, Amanda MacInnis, Loïc Maurin, Jeffrey McMahon, Kavilan Moodley, Sigurd Naess, Toshiya Namikawa, Laura Newburgh, John P. Nibarger, Micheal D. Niemack, Lyman A. Page, Bruce Partridge, Frank J. Qu, Naomi Robertson, Benjamin Schmitt, Neelima Sehgal, Cristóbal Sifón, David N. Spergel, Suzanne Staggs, Emilie Storer, Alexander van Engelen, Edward J. Wollack
We construct cosmic microwave background lensing mass maps using data from the 2014 and 2015 seasons of observations with the Atacama Cosmology Telescope (ACT).
Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies
1 code implementation • 28 Jan 2020 • Toshiya Namikawa, Yilun Guan, Omar Darwish, Blake D. Sherwin, Simone Aiola, Nicholas Battaglia, James A. Beall, Daniel T. Becker, J. Richard Bond, Erminia Calabrese, Grace E. Chesmore, Steve K. Choi, Mark J. Devlin, Joanna Dunkley, Rolando Dünner, Anna E. Fox, Patricio A. Gallardo, Vera Gluscevic, Dongwon Han, Matthew Hasselfield, Gene C. Hilton, Adam D. Hincks, Renée Hložek, Johannes Hubmayr, Kevin Huffenberger, John P. Hughes, Brian J. Koopman, Arthur Kosowsky, Thibaut Louis, Marius Lungu, Amanda MacInnis, Mathew S. Madhavacheril, Maya Mallaby-Kay, Loïc Maurin, Jeffrey McMahon, Kavilan Moodley, Sigurd Naess, Federico Nati, Laura B. Newburgh, John P. Nibarger, Michael D. Niemack, Lyman A. Page, Frank J. Qu, Naomi Robertson, Alessandro Schillaci, Neelima Sehgal, Cristóbal Sifón, Sara M. Simon, David N. Spergel, Suzanne T. Staggs, Emilie R. Storer, Alexander van Engelen, Jeff Van Lanen, Edward J. Wollack
We present new constraints on anisotropic birefringence of the cosmic microwave background polarization using two seasons of data from the Atacama Cosmology Telescope covering $456$ square degrees of sky.
Cosmology and Nongalactic Astrophysics High Energy Physics - Experiment High Energy Physics - Phenomenology
no code implementations • 27 Dec 2018 • Toshiya Namikawa, Benjamin Bose, François R. Bouchet, Ryuichi Takahashi, Atsushi Taruya
Following on an earlier paper, we test analytical predictions of the CMB lensing bi-spectrum against full-sky lensing simulations, and discuss their validity and limitation in detail.
Cosmology and Nongalactic Astrophysics
1 code implementation • 31 Oct 2017 • Toshiya Namikawa
We present constraints on the patchy reionization by measuring the trispectrum of the Planck 2015 cosmic microwave background (CMB) temperature anisotropies.
Cosmology and Nongalactic Astrophysics
no code implementations • 16 Jun 2017 • José Manuel Zorrilla Matilla, Zoltán Haiman, Andrea Petri, Toshiya Namikawa
We explore the sensitivity of weak lensing observables to the expansion history of the universe and to the growth of cosmic structures, as well as the relative contribution of both effects to constraining cosmological parameters.
Cosmology and Nongalactic Astrophysics
2 code implementations • 5 Jun 2017 • Ryuichi Takahashi, Takashi Hamana, Masato Shirasaki, Toshiya Namikawa, Takahiro Nishimichi, Ken Osato, Kosei Shiroyama
The data sets include full-sky convergence and shear maps from redshifts $z=0. 05$ to $5. 3$ at intervals of $150 \, h^{-1}{\rm Mpc}$ comoving radial distance (corresponding to a redshift interval of $\Delta z \simeq 0. 05$ at the nearby universe), enabling the construction of a mock shear catalog for an arbitrary source distribution up to $z=5. 3$.
Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology
no code implementations • 1 Mar 2017 • Toshiya Namikawa
We present a new method for delensing $B$ modes of the cosmic microwave background (CMB) using a lensing potential reconstructed from the same realization of the CMB polarization (CMB internal delensing).
Cosmology and Nongalactic Astrophysics
no code implementations • 23 Dec 2016 • Toshiya Namikawa
We study the reconstruction of the cosmic rotation power spectrum produced by parity-violating physics, with an eye to ongoing and near future cosmic microwave background (CMB) experiments such as BICEP Array, CMBS4, LiteBIRD and Simons Observatory.
Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology High Energy Physics - Theory
1 code implementation • 26 May 2014 • Toshiya Namikawa, Ryo Nagata
The lensing signals involved in CMB polarization maps have already been measured with ground-based experiments such as SPTpol and POLARBEAR, and would become important as a probe of cosmological and astrophysical issues in the near future.
Cosmology and Nongalactic Astrophysics Instrumentation and Methods for Astrophysics
no code implementations • 9 Oct 2013 • Toshiya Namikawa, Ryuichi Takahashi
The contamination from beam asymmetry and polarization angle uncertainties, however, can generate mean-field biases for the EB estimator.
Cosmology and Nongalactic Astrophysics
no code implementations • 1 Sep 2012 • Toshiya Namikawa, Duncan Hanson, Ryuichi Takahashi
We present new methods for lensing reconstruction from CMB temperature fluctuations which have smaller mean-field and reconstruction noise bias corrections than current lensing estimators, with minimal loss of signal-to-noise.
Cosmology and Nongalactic Astrophysics