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Cosmology x clear all

CMB B-mode auto-bispectrum produced by primordial gravitational waves

Hiroaki W H Tahara and Jun’ichi Yokoyama.

in Progress of Theoretical and Experimental Physics

P ublished online January 2018 .

Journal Article. Subjects: Relativity and Gravitation; Cosmology. 2987 words.

Abstract

Gravitational waves from inflation induce polarization patterns in the cosmic microwave background (CMB). It is known that there are only two types of...

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CMB foreground: A concise review

Kiyotomo Ichiki.

in Progress of Theoretical and Experimental Physics

P ublished online June 2014 .

Journal Article. Subjects: Cosmology. 7810 words.

Observations of Cosmic Microwave Background (CMB) anisotropies have become the most powerful probe of the early universe and cosmology. Recent satellite CMB experiments have revealed the...

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CMB spectral distortions and energy release in the early universe

Hiroyuki Tashiro.

in Progress of Theoretical and Experimental Physics

P ublished online June 2014 .

Journal Article. Subjects: Cosmology. 12679 words.

Measuring the spectral deviation of the cosmic microwave background (CMB) from the blackbody spectrum has become a focus of attention as a probe of the thermal history of the Universe. It...

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CO (3–2) and CO (2–1) Detections in a z = 1.3 Hyper-Luminous Starburst Galaxy

Daisuke Iono, Yoichi Tamura, Kouichiro Nakanishi, Ryohei Kawabe, Kotaro Kohno, Takeshi Okuda, Kenkichi Yamada, Bunyo Hatsukade and Masahiro Sameshima.

in Publications of the Astronomical Society of Japan

December 2006; p ublished online December 2006 .

Journal Article. Subjects: Galaxies; Cosmology. 4999 words.

We present an [math] resolution image of the CO (2–1) emission and an [math] resolution image of the CO (3–2) emission in the [math] hyper-luminous starburst galaxy MIPS...

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Consistency relations for large-field inflation

Takeshi Chiba and Kazunori Kohri.

in Progress of Theoretical and Experimental Physics

P ublished online September 2014 .

Journal Article. Subjects: Cosmology. 1953 words.

Consistency relations for chaotic inflation with a monomial potential, natural inflation, and hilltop inflation are given that involve the scalar spectral index [math], the tensor-to-scalar...

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Consistency relations for large-field inflation: Non-minimal coupling

Takeshi Chiba and Kazunori Kohri.

in Progress of Theoretical and Experimental Physics

February 2015; p ublished online February 2015 .

Journal Article. Subjects: Cosmology. 2502 words.

We derive the consistency relations for a chaotic inflation model with a non-minimal coupling to gravity. For a quadratic potential in the limit of a small non-minimal coupling parameter...

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Constraining hydrostatic mass bias of galaxy clusters with high-resolution X-ray spectroscopy

Naomi Ota, Daisuke Nagai and Erwin T Lau.

in Publications of the Astronomical Society of Japan

June 2018; p ublished online April 2018 .

Journal Article. Subjects: Cosmology; Galaxies; Astronomical Instrumentation, Methods, and Techniques; Astronomy and Astrophysics. 8184 words.

Abstract

Gas motions in galaxy clusters play important roles in determining the properties of the intracluster medium (ICM) and in the constraint of...

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Constraints for the thawing and freezing potentials

Tetsuya Hara, Anna Suzuki, Shogo Saka and Takuma Tanigawa.

in Progress of Theoretical and Experimental Physics

P ublished online January 2018 .

Journal Article. Subjects: Cosmology. 9839 words.

Abstract

We study the accelerating present universe in terms of the time evolution of the equation of state [math] (redshift [math]) due to thawing and...

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Contribution of Supernova Gamma-Rays to the Gamma-Ray Background Emission

Kousei Iwabuchi and Shiomi Kumagai.

in Publications of the Astronomical Society of Japan

August 2001; p ublished online August 2001 .

Journal Article. Subjects: Astronomy and Astrophysics; Cosmology; Stars. 2456 words.

Diffuse [math]-ray background emission has been observed by a number of satellites and balloons. The spectrum spreads over a wide range of photon energies, and the emission is almost...

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Cosmic evolution of bars in simulations of galaxy formation

Takashi Okamoto, Mari Isoe and Asao Habe.

in Publications of the Astronomical Society of Japan

August 2015; p ublished online June 2015 .

Journal Article. Subjects: Galaxies; Cosmology; Astronomical Instrumentation, Methods, and Techniques. 10040 words.

We investigate the evolution of two bars formed in fully self-consistent hydrodynamic simulations of the formation of Milky Way-mass galaxies. One galaxy shows higher central mass...

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