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A coronal hole jet observed with Hinode and the Solar Dynamics Observatory
Young, Peter R.; Muglach, Karin
A small blowout jet was observed at the boundary of the south polar coronal hole on 2011 February 8 at around 21:00 UT. Images from the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO) revealed an expanding loop rising from one footpoint of a compact, bipolar bright point. Magnetograms from the Helioseismic Magnetic…
The solar cycle dependence of the weak internetwork flux
McIntosh, Scott W.; Lites, Bruce W.; Centeno, Rebecca
We examine data from the Hinode Observing Program 79 (the "HOP 79" irradiance program) as observed using the Hinode Solar Optical Telescope Spectro-Polarimeter for systematic changes in the weakest observable magnetic flux during the period 2008-2013. At moderate latitudes we find no evidence for systematic changes as a function of time and solar …
(25143) Itokawa: The power of radiometric techniques for the interpretation of remote thermal observations in the light of the Hayabusa rendezvous results*
Hasegawa, Sunao; Usui, Fumihiko; Müller, Thomas G.
The near-Earth asteroid (25143) Itokawa was characterized in great detail by the Japanese Hayabusa mission. We revisited the available thermal observations in the light of the true asteroid properties with the goal of evaluating the possibilities and limitations of thermal model techniques. In total, we used 25 published ground-based mid-infrared …
The AKARI Far-Infrared Surveyor young stellar object catalog
Tamura, Motohide; Kawamura, Akiko; Marton, Gábor +6 more
We demonstrate the use of the AKARI all-sky survey photometric data in the study of galactic star formation. Our aim was to select young stellar objects (YSOs) in the AKARI Far-Infrared Surveyor (FIS) Bright Source Catalogue. We used AKARI/FIS and Wide-field Infrared Survey Explorer (WISE) data to derive mid- and far-infrared colors of YSOs. Class…
Universal profiles of the intracluster medium from Suzaku X-ray and Subaru weak-lensing observations*
Sato, Kosuke; Fukazawa, Yasushi; Nakazawa, Kazuhiro +16 more
We conduct a joint X-ray and weak-lensing study of four relaxed galaxy clusters (Hydra A, A 478, A 1689, and A 1835) observed by both Suzaku and Subaru out to virial radii, with the aim of understanding recently discovered unexpected features of the intracluster medium (ICM) in cluster outskirts. We show that the average hydrostatic-to-lensing tot…
Discovery of recombining plasma in the supernova remnant 3C 391
Takahashi, Tadayuki; Koyama, Katsuji; Nakashima, Shinya +2 more
Recent X-ray study of middle-aged supernova remnants (SNRs) reveals strong radiative recombination continua (RRCs) associated with overionized plasmas, which origin still remains uncertain. We report a discovery of an RRC in the middle-aged SNR 3C 391. If the X-ray spectrum is fitted with a two-temperature plasma model in collisional ionization eq…
Constraining hot plasma in a non-flaring solar active region with FOXSI hard X-ray observations
Krucker, Säm; Shimojo, Masumi; Ishibashi, Kazunori +6 more
We present new constraints on the high-temperature emission measure of a non-flaring solar active region using observations from the recently flown Focusing Optics X-ray Solar Imager (FOXSI) sounding rocket payload. FOXSI has performed the first focused hard X-ray (HXR) observation of the Sun in its first successful flight on 2012 November 2. Focu…
Interpretation of the X-ray spectral variation of 1H 0707-495 with a variable double partial covering model
Ebisawa, Ken; Mizumoto, Misaki; Sameshima, Hiroaki
The narrow-line Seyfert 1 galaxy 1H 0707-495 is known to exhibit significant X-ray spectral variations. Its X-ray energy spectrum is characterized by a strong soft excess emission, an extremely deep iron K-edge structure at ∼ 7 keV, and a putative iron L-line/edge feature at ∼ 1 keV. We have found that the energy spectrum of 1H 0707-495 in 0.5-10 …
Firm detection of a cyclotron resonance feature with Suzaku in the X-ray spectrum of GRO J1008-57 during a giant outburst in 2012
Makishima, Kazuo; Sasano, Makoto; Mihara, Tatehiro +3 more
We report on the firm detection of a cyclotron resonance scattering feature (CRSF) in the X-ray spectrum of the Be X-ray binary pulsar, GRO J1008-57, achieved by the Suzaku Hard X-ray Detector during a giant outburst which was detected by the MAXI Gas Slit Camera in 2012 November. The Suzaku observation was carried out on 2012 November 20, outburs…
Abundances in the ejecta of core-collapse supernova remnants G350.1-0.3 and G349.7+0.2
Koyama, Katsuji; Uchida, Hiroyuki; Yasumi, Masato +5 more
We present Suzaku results of the two Galactic supernova remnants (SNRs) G350.1-0.3 and G349.7+0.2. We find Al and Ni Kα lines from both the SNRs for the first time, in addition to previously detected K-shell lines of Mg, Si, S, Ar, Ca, and Fe. The spectra are well described by two optically thin thermal plasmas: a low-temperature (low-kT) plasma i…