Search Publications
X-ray filament with a strong 6.7-keV line in the Galactic center region
Koyama, Katsuji; Nobukawa, Masayoshi; Nakashima, Shinya +3 more
An elongated X-ray source with a strong K-shell line from He-like iron (Fe XXVI) is found at (RA, Dec)J2000.0 = (17h44m00{s.}0, - 29°13'40{^''.}9) in the Galactic center region. The position coincides with the X-ray thread, G359.55+0.16, which is aligned with the radio non-thermal f…
X-ray emission from the galactic supernova remnant G12.0-0.1
Koyama, Katsuji; Bamba, Aya; Yamauchi, Shigeo
We present results of the Suzaku/XIS observation around the radio supernova remnant (SNR) G12.0-0.1. No significant diffuse emission extending in or along the radio shell was observed. Instead, two compact X-ray sources, Suzaku J181205-1835 and Suzaku J181210-1842, were found in or near G12.0-0.1. Suzaku J181205-1835 is located at the north-west o…
Discovery of an overlapping cluster in the Abell 1674 field with Suzaku
Koyama, Katsuji; Hayashida, Kiyoshi; Akamatsu, Hiroki +5 more
We present the results of a Suzaku observation of Abell 1674, an optically very rich (richness class 3) cluster cataloged as z = 0.1066. We discover the He-like Fe K-shell line from the central region for the first time, and find that the X-ray spectrum yields a high redshift of 0.215^{+0.007}_{-0.006}. On the other hand, the spectrum of the south…
X-ray development of the classical nova V2672 Ophiuchi with Suzaku
Drake, Jeremy J.; Tsujimoto, Masahiro; Kitamoto, Shunji +1 more
We report on the Suzaku detection of a rapid flare-like X-ray flux amplification early in the development of the classical nova V2672 Ophiuchi. Two target-of-opportunity ∼ 25 ks X-ray observations were made 12 and 22 d after the outburst. The flux amplification was found in the latter half of day 12. Time-sliced spectra are characterized by a grow…
Possible signature of Alfvén wave dissipation in the localized magnetic funnels of the equatorial solar corona
Dwivedi, Bhola N.; Mohan, Anita; Srivastava, Abhishek Kumar
We analyse the Hinode/EIS 2″-spectroscopic scan data containing the spectral line formed at typical inner coronal temperature. The strong Fe XII 195.120 Å line shows the existence of funnel-like expanding flux-tubes which exhibit the signature of blue-/red-shifted plasma motions in the off-limb equatorial corona. These coronal funnels expand in th…
Hinode 7: Conference summary and future suggestions
Priest, Eric
This conclusion to the seventh Hinode science meeting (2013 November in Takayama, Japan) attempts to summarise what we have learnt during the conference (mainly from the review talks) about new observations from Hinode and about theories stimulated by them. Suggestions for future study are also offered.