106 citations · 117 across the 10 of their papers we have counts for
12 papers
Nuclear Millimeter Continuum Emission in Radio-Quiet Active Galactic Nuclei: an ALMA Spectral and Variability Study
Sophie M. Venselaar, Claudio Ricci, Yoshiyuki Inoue +8
Unresolved millimeter (mm) emission is observed in radio-quiet (RQ) Active Galactic Nuclei (AGN), but its physical origin remains debated. Self-absorbed synchrotron emission from t…
XMM-Newton Resolves Parsec-scale X-ray Jets in the PeVatron Microquasar V4641 Sgr
Naomi Tsuji, Caterina Tresoldi, Kaya Mori +34
The microquasar V4641 Sagittarii (V4641 Sgr) has recently been established as one of the most powerful Galactic PeV cosmic-ray accelerators (PeVatrons) through the detection of deg…
Disk truncation triggers relativistic jet launching of a highly accreting supermassive black hole
Hirofumi Noda, Kazuhiro Hada, Hiroto Maruyama +10
Relativistic jets are among the most energetic phenomena in the Universe and influence galaxy evolution through energetic feedback, yet the physical connection between accretion fl…
The first proper motion measurement of the acceleration regions in the large-scale jets of SS 433 powering the W50 nebula
Naomi Tsuji, Yoshiyuki Inoue, Dmitry Khangulyan +10
We report on new Chandra ACIS-I observations of the X-ray knots located in the western and eastern lobes of W50 associated with the parsec-scale jets of the Galactic microquasar SS…
X-ray Study on Propagation of Non-thermal Particles in Microquasar SS 433/W 50 Extended Jets
Kazuho Kayama, Takaaki Tanaka, Hiroyuki Uchida +5
SS 433, located at the center of the W 50 radio nebula, is a binary system that ejects jets oriented east-west with precessional motion. X-ray lobes, containing compact "knots" lab…
On the possible contributions of two nearby blazars to the NGC 4151 neutrino hotspot
Anastasiia Omeliukh, Samuel Barnier, Yoshiyuki Inoue
The origin of the high-energy astrophysical neutrinos discovered by IceCube remains unclear, with both blazars and Seyfert galaxies emerging as potential sources. Recently, the Ice…
Multi-epoch X-ray spectral analysis of Centaurus A: revealing new constraints on iron emission line origins
Toshiya Iwata, Atsushi Tanimoto, Hirokazu Odaka +3
We conduct X-ray reverberation mapping and spectral analysis of the radio galaxy Centaurus A to uncover its central structure. We compare the light curve of the hard X-ray continuu…
The possibility of multi-TeV secondary gamma rays from GRB221009A
Oleg Kalashev, Felix Aharonian, Warren Essey +2
The brightest gamma ray burst (GRB) ever observed, GRB221009A, produced a surprisingly large flux of gamma rays with multi-TeV energies, which are expected to be absorbed in intera…
Neutrinos and gamma rays from beta decays in an active galactic nucleus NGC 1068 jet
Koichiro Yasuda, Nobuyuki Sakai, Yoshiyuki Inoue +1
We show that TeV neutrinos and high-energy gamma rays detected from the nearby active galaxy NGC 1068 can simultaneously be explained in a model based on the beta decays of neutron…
ALMA Confirmation of Millimeter Time Variability in the Gamma-Ray Detected Seyfert Galaxy GRS 1734-292
Tomonari Michiyama, Yoshiyuki Inoue, Akihiro Doi +4
GRS 1734-292 is a radio-quiet galaxy, exhibiting neither intense starburst nor jet activities. However, Fermi-LAT detected this object in the GeV band. The origin of non-thermal ac…
Upper Limit on the Coronal Cosmic Ray Energy Budget in Seyfert Galaxies
Yoshiyuki Inoue, Shinsuke Takasao, Dmitry Khangulyan
The IceCube collaboration has reported possible detections of high-energy neutrinos from nearby Seyfert galaxies. While central hot coronae are proposed as the primary neutrino pro…
The ASTRO-H X-ray Observatory
Tadayuki Takahashi, Kazuhisa Mitsuda, Richard Kelley +220
The joint JAXA/NASA ASTRO-H mission is the sixth in a series of highly successful X-ray missions initiated by the Institute of Space and Astronautical Science (ISAS). ASTRO-H will…