125 research outputs found
A New Gamma-Ray Source in the Vicinity of the Galactic Supernova Remnant G306.30.9
A new extended gamma-ray source, which was named as Source A, in the
southwest of Galactic supernova remnant (SNR) G306.30.9 was detected with a
significance of 13 at the location of R.A. (J2000) =
13 17 52.80, Decl. (J2000) =
63 55 48.00 using about 9 years of Fermi-LAT data. In
order to investigate this unidentified gamma-ray source in multi-wavelengths,
we performed Swift observations of Source A. In this presentation we summarize
the published gamma-ray results, report about the recent ToO Swift observations
of Source A, and show our preliminary results of the gamma-ray analysis that we
conducted using the new X-ray data.Comment: Published in proceedings of "7th Fermi Symposium 2017",
PoS(IFS2017)10
Discovery of recombining plasma inside the extended gamma-ray supernova remnant HB9
We present the results from the Suzaku X-ray Imaging Spectrometer observation
of the mixed-morphology supernova remnant (SNR) HB9 (G160.9+2.6). We discovered
recombining plasma (RP) in the western Suzaku observation region and the
spectra here are well described by a model having collisional ionization
equilibrium (CIE) and RP components. On the other hand, the X-ray spectra from
the eastern Suzaku observation region are best reproduced by the CIE and
non-equilibrium ionization model. We discuss possible scenarios to explain the
origin of the RP emission based on the observational properties and concluded
that the rarefaction scenario is a possible explanation for the existence of
RP. In addition, the gamma-ray emission morphology and spectrum within the
energy range of 0.2300 GeV are investigated using 10 years of data
from the Fermi Large Area Telescope (LAT). The gamma-ray morphology of HB9 is
best described by the spatial template of radio continuum emission. The
spectrum is well-fit to a log-parabola function and its detection significance
was found to be 25. Moreover, a new gamma-ray point source
located just outside the south-east region of the SNR's shell was detected with
a significance of 6. We also investigated the archival HI and CO
data and detected an expanding shell structure in the velocity range of
and km s that is coinciding with a region of gamma-ray
enhancement at the southern rim of the HB9 shell.Comment: 12 pages, 7 figures, accepted for publication in MNRA
Chandra Observations of A Galactic Supernova Remnant Vela Jr.: A New Sample of Thin Filaments Emitting Synchrotron X-Rays
A galactic supernova remnant (SNR) Vela Jr. (RX J0852.04622, G266.61.2)
shows sharp filamentary structure on the north-western edge of the remnant in
the hard X-ray band. The filaments are so smooth and located on the most outer
side of the remnant. We measured the averaged scale width of the filaments
( and ) with excellent spatial resolution of {\it Chandra}, which are
in the order of the size of the point spread function of {\it Chandra} on the
upstream side and 49.5 (36.0--88.8) arcsec on the downstream side,
respectively. The spectra of the filaments are very hard and have no line-like
structure, and were well reproduced with an absorbed power-law model with
2.67 (2.55--2.77), or a {\tt SRCUT} model with = 4.3
(3.4--5.3) Hz under the assumption of . These results
imply that the hard X-rays are synchrotron radiation emitted by accelerated
electrons, as mentioned previously. Using a correlation between a function
and the SNR age, we estimated the
distance and the age of Vela Jr.: the estimated distance and age are 0.33
(0.26--0.50) kpc and 660 (420--1400) years, respectively. These results are
consistent with previous reports, implying that --age relation may be
a useful tool to estimate the distance and the age of synchrotron X-ray
emitting SNRs.Comment: 19 pages, 8 figures, ApJ, in pres
Yoga-plus exercise mix promotes cognitive, affective, and physical functions in elderly people
Objectives:
Increased attention is being paid to Asian medicine in balanced total health care. We investigated the effects of mixed exercise including yoga ('Yoga-plus') among elderly individuals.
Methods:
A total of 385 subjects (72 males and 313 females, 75.5 ± 8.7 years old) participated in a 12-month (M) exercise program at a health and welfare center, a day service center, and a nursing home. Cognitive, affective, and physical functions, and activities of daily living (ADL), were compared at baseline (0M), 6M and 12M of exercise intervention.
Results:
Mean scores on the frontal assessment battery, clock drawing test, cube copying test, letter fluency, and category fluency significantly improved after the Yoga-plus intervention, while mini-mental state examination, Hasegawa dementia score-revised, and trail-making test performance were relatively stable. Affective scores on the geriatric depression scale (GDS), apathy scale (AS) and Abe's behavioral and psychological symptoms of dementia were not significantly affected by exercise therapy, but subgroups with higher baseline GDS (GDS ≥ 5) and AS (AS ≥ 16) scores showed a significant improvement after intervention. One-leg standing time and 3-m timed up and go test performance significantly improved after 12M intervention.
Discussion:
Yoga-plus improved cognitive, affective, ADL, and physical functions in a local elderly population, particularly among below-baseline individuals, indicating the benefits of dementia prevention among elderly individuals
Low-intensity pulsed ultrasound activates the phosphatidylinositol 3 kinase/Akt pathway and stimulates the growth of chondrocytes in three-dimensional cultures: a basic science study
Relationships between repeated instruction on inhalation therapy, medication adherence, and health status in chronic obstructive pulmonary disease
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