Search Results - "Kawanaka, Norita"

Effects of Heat Conduction on Blocking off the Super-Eddington Growth of Black Holes at High Redshift by Kawanaka, Norita, Kohri, Kazunori

“…Abstract We investigate the effect of conductive heating of the gas surrounding a geometrically thick accretion disk on the growth of a black hole (BH) at high…”
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Radio emission from accreting isolated black holes in our galaxy by Tsuna, Daichi, Kawanaka, Norita

“…ABSTRACT Apart from the few tens of stellar-mass black holes discovered in binary systems, an order of 108 isolated black holes (IBHs) are believed to be…”
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Cosmic-Ray Lithium Production at the Nova Eruptions Followed by a Type Ia Supernova by Kawanaka, Norita, Yanagita, Shohei

“…Recent measurements of cosmic-ray (CR) light nuclei by AMS-02 have shown that there is an unexpected component of CR lithium whose spectral index is harder…”
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Search for a Black Hole Binary in Gaia DR3 Astrometric Binary Stars with Spectroscopic Data by Tanikawa, Ataru, Hattori, Kohei, Kawanaka, Norita, Kinugawa, Tomoya, Shikauchi, Minori, Tsuna, Daichi

“…Abstract We report the discovery of a candidate binary system consisting of a black hole (BH) and a red giant branch star in Gaia DR3. This binary system was…”
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Spatial and Binary Parameter Distributions of Black Hole Binaries in the Milky Way Detectable with Gaia by Shikauchi, Minori, Tsuna, Daichi, Tanikawa, Ataru, Kawanaka, Norita

“…Abstract Soon after Gaia Data Release 3 (DR3) in 2022 June, some candidates (and one confirmed) of detached black hole (BH)–luminous companion (LC) binaries…”
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Detecting Black Hole Binaries by Gaia by Yamaguchi, Masaki S., Kawanaka, Norita, Bulik, Tomasz, Piran, Tsvi

“…We study the prospects of the Gaia satellite to identify black hole (BH) binary systems by detecting the orbital motion of the companion stars. Taking into…”
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Influence of Black Hole Kick Velocity on Microlensing Distributions by Koshimoto, Naoki, Kawanaka, Norita, Tsuna, Daichi

“…Abstract The natal kick velocity distribution for black holes (BHs) is unknown regardless of its importance for understanding the BH formation process…”
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X-ray detectability of accreting isolated black holes in our Galaxy by Tsuna, Daichi, Kawanaka, Norita, Totani, Tomonori

“…Abstract Detectability of isolated black holes (IBHs) without a companion star but emitting X-rays by accretion from dense interstellar medium (ISM) or…”
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What determines the unique spectra of super-Eddington accretors? Origin of optically thick and low-temperature coronae in super-Eddington accretion flows by Kawanaka, Norita, Mineshige, Shin

“…Abstract The existence of relatively cool (kBT ≲ 10 keV) and optically thick (τ ≳ 3) coronae are inferred above super-Eddington accretion flow such as…”
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High-energy gamma-ray and neutrino production in star-forming galaxies across cosmic time: Difficulties in explaining the IceCube data by Sudoh, Takahiro, Totani, Tomonori, Kawanaka, Norita

“…Abstract We present new theoretical modeling to predict the luminosity and spectrum of gamma-ray and neutrino emission of a star-forming galaxy, from the star…”
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Magnetically Arrested Disks in Quiescent Black Hole Binaries: Formation Scenario, Observable Signatures, and Potential PeVatrons by Kimura, Shigeo S., Sudoh, Takahiro, Kashiyama, Kazumi, Kawanaka, Norita

“…Abstract We propose magnetically arrested disks (MADs) in quiescent (low-luminosity) black hole (BH) binaries as the origin of multiwavelength emission, and…”
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The Relationships between Active Galactic Nucleus Power and Molecular Gas Mass within 500 pc of the Center of Elliptical Galaxies by Fujita, Yutaka, Izumi, Takuma, Nagai, Hiroshi, Kawakatu, Nozomu, Kawanaka, Norita

“…Abstract The physical quantity that directly controls the feedback of active galactic nuclei (AGNs) in elliptical galaxies remains to be determined. The…”
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JET LUMINOSITY FROM NEUTRINO-DOMINATED ACCRETION FLOWS IN GAMMA-RAY BURSTS by Kawanaka, Norita, Piran, Tsvi, Krolik, Julian H

“…A hyperaccretion disk formed around a stellar-mass black hole is a plausible model for the central engine that powers gamma-ray bursts (GRBs). If the central…”
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Neutrino flavor ratios modified by cosmic-ray secondary acceleration by Kawanaka, Norita, Ioka, Kunihito

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A Relativistic Formula for the Multiple Scattering of Photons by Takahashi, Rohta, Umemura, Masayuki, Ohsuga, Ken, Asahina, Yuta, Takeda, Rintaro, Takahashi, Mikiya M., Kawanaka, Norita, Konno, Kohkichi, Nagasawa, Tomoaki

“…Abstract We have discovered analytical expressions for the probability density function (PDF) of photons that are multiply scattered in relativistic flows,…”
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TeV cosmic-ray electrons from millisecond pulsars by Kisaka, Shota, Kawanaka, Norita

“…Recent γ-ray observations by Fermi Gamma-Ray Space Telescope suggest that the γ-ray millisecond pulsar (MSP) population is separated into two subclasses with…”
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How does a secular instability grow in a hyperaccretion flow? by Kimura, Mariko, Mineshige, Shin, Kawanaka, Norita

“…Hyperaccretion flows with mass accretion rates far above the Eddington rate have an N-shaped equilibrium curve on the Σ– $\skew{3}\dot{M}$ plane (with Σ and…”
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Can the relativistic light-bending model explain X-ray spectral variations of Seyfert galaxies? by Mizumoto, Misaki, Moriyama, Kotaro, Ebisawa, Ken, Mineshige, Shin, Kawanaka, Norita, Tsujimoto, Masahiro

“…Abstract Many Seyfert galaxies are known to exhibit Fe-K broad emission line features in their X-ray energy spectra. The observed lines have three distinct…”
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Positron annihilation as a cosmic ray probe by Ohira, Yutaka, Kohri, Kazunori, Kawanaka, Norita

“…ABSTRACT Recently, the gamma‐ray telescopes AGILE and Fermi observed several middle‐aged supernova remnants (SNRs) interacting with molecular clouds. A…”
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Dead Zone Formation and Nonsteady Hyperaccretion in Collapsar Disks: A Possible Origin of Short-Term Variability in the Prompt Emission of Gamma-Ray Bursts by Masada, Youhei, Kawanaka, Norita, Sano, Takayoshi, Shibata, Kazunari

“…The central engine of gamma-ray bursts (GRBs) is believed to be a hot and dense disk with hyperaccretion onto a few solar-mass black hole. We investigate where…”
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