Fumie Akimoto
YOU?
Author Swipe
Detection of polarized gamma-ray emission from the Crab nebula with the Hitomi Soft Gamma-ray Detector Open
We present the results from the Hitomi Soft Gamma-ray Detector (SGD) observation of the Crab nebula. The main part of SGD is a Compton camera, which in addition to being a spectrometer, is capable of measuring polarization of gamma-ray pho…
Measurements of resonant scattering in the Perseus Cluster core with Hitomi SXS Open
Thanks to its high spectral resolution (∼5 eV at 6 keV), the Soft X-ray Spectrometer (SXS) on board Hitomi enables us to measure the detailed structure of spatially resolved emission lines from highly ionized ions in galaxy clusters for th…
Temperature structure in the Perseus cluster core observed with Hitomi Open
The present paper explains the temperature structure of X-ray emitting plasma in the core of the Perseus cluster based on 1.8–20.0 keV data obtained with the Soft X-ray Spectrometer (SXS) on board the Hitomi Observatory. A series of four o…
Hitomi observation of radio galaxy NGC 1275: The first X-ray microcalorimeter spectroscopy of Fe-Kα line emission from an active galactic nucleus Open
The origin of the narrow Fe-Kα fluorescence line at 6.4 keV from active galactic nuclei has long been under debate; some of the possible sites are the outer accretion disk, the broad line region, a molecular torus, or interstellar/intraclu…
Hitomi X-ray observation of the pulsar wind nebula G21.5−0.9 Open
We present results from the Hitomi X-ray observation of a young composite-type supernova remnant (SNR) G21.5−0.9, whose emission is dominated by the pulsar wind nebula (PWN) contribution. The X-ray spectra in the 0.8–80 keV range obtained …
Hitomi (ASTRO-H) X-ray Astronomy Satellite Open
The Hitomi (ASTRO-H) mission is the sixth Japanese x-ray astronomy satellite developed by a large international collaboration, including Japan, USA, Canada, and Europe. The mission aimed to provide the highest energy resolution ever achiev…
Atomic data and spectral modeling constraints from high-resolution X-ray observations of the Perseus cluster with Hitomi Open
The Hitomi Soft X-ray Spectrometer spectrum of the Perseus cluster, with ∼5 eV resolution in the 2–9 keV band, offers an unprecedented benchmark of the atomic modeling and database for hot collisional plasmas. It reveals both successes and…
Hitomi observations of the LMC SNR N 132 D: Highly redshifted X-ray emission from iron ejecta Open
We present Hitomi observations of N 132 D, a young, X-ray bright, O-rich core-collapse supernova remnant in the Large Magellanic Cloud (LMC). Despite a very short observation of only 3.7 ks, the Soft X-ray Spectrometer (SXS) easily detects…
Atmospheric gas dynamics in the Perseus cluster observed with Hitomi Open
Extending the earlier measurements reported in Hitomi collaboration (2016, Nature, 535, 117), we examine the atmospheric gas motions within the central 100 kpc of the Perseus cluster using observations obtained with the Hitomi satellite. A…
Hitomi X-ray studies of giant radio pulses from the Crab pulsar Open
To search for giant X-ray pulses correlated with the giant radio pulses (GRPs) from the Crab pulsar, we performed a simultaneous observation of the Crab pulsar with the X-ray satellite Hitomi in the 2–300 keV band and the Kashima NICT radi…
Search for thermal X-ray features from the Crab nebula with the Hitomi soft X-ray spectrometer Open
The Crab nebula originated from a core-collapse supernova (SN) explosion observed in 1054 ad. When viewed as a supernova remnant (SNR), it has an anomalously low observed ejecta mass and kinetic energy for an Fe-core-collapse SN. Intensive…
Hitomi Constraints on the 3.5 keV Line in the Perseus Galaxy Cluster Open
High-resolution X-ray spectroscopy with Hitomi was expected to resolve the origin of the faint unidentified emission line reported in several low-resolution studies of various massive systems, such as galaxies and clusters, including the P…
View article: The ASTRO-H (Hitomi) x-ray astronomy satellite
The ASTRO-H (Hitomi) x-ray astronomy satellite Open
The Hitomi (ASTRO-H) mission is the sixth Japanese X-ray astronomy satellite developed by a large international collaboration, including Japan, USA, Canada, and Europe. The mission aimed to provide the highest energy resolution ever achiev…