32 research outputs found
VERA Observation of the W49N H2O Maser Outburst in 2003 October
We report on a strong outburst of the W49N H2O maser observed with VERA.
Single-dish monitoring with VERA 20 m telescopes detected a strong outburst of
the maser feature at V_LSR = -30.7 km/s in 2003 October. The outburst had a
duration of ~100 days and a peak intensity of 7.9 x 10^4 Jy, being one of the
strongest outbursts in W49N observed so far. VLBI observations with the VERA
array were also carried out near to the maximum phase of the outburst, and the
outburst spot was identified in the VLBI map. While the map was in good
agreement with previous studies, showing three major concentrations of maser
spots, we found a newly formed arc-like structure in the central maser
concentration, which may be a shock front powered by a forming star or a star
cluster. The outburst spot was found to be located on the arc-like structure,
indicating a possible connection of the present outburst to a shock phenomenon.Comment: 4 pages, 2 figures included, to appear in PASJ letter (Vol.56, #3,
2004 June
Young and Intermediate-age Distance Indicators
Distance measurements beyond geometrical and semi-geometrical methods, rely
mainly on standard candles. As the name suggests, these objects have known
luminosities by virtue of their intrinsic proprieties and play a major role in
our understanding of modern cosmology. The main caveats associated with
standard candles are their absolute calibration, contamination of the sample
from other sources and systematic uncertainties. The absolute calibration
mainly depends on their chemical composition and age. To understand the impact
of these effects on the distance scale, it is essential to develop methods
based on different sample of standard candles. Here we review the fundamental
properties of young and intermediate-age distance indicators such as Cepheids,
Mira variables and Red Clump stars and the recent developments in their
application as distance indicators.Comment: Review article, 63 pages (28 figures), Accepted for publication in
Space Science Reviews (Chapter 3 of a special collection resulting from the
May 2016 ISSI-BJ workshop on Astronomical Distance Determination in the Space
Age
Inhibition of mTOR delayed but could not prevent experimental collapsing focal segmental glomerulosclerosis
Contains fulltext :
220207.pdf (publisher's version ) (Open Access
Mechanism of fetal poisoning by mercury. Distribution of mercury-binding protein in the placenta and fetus of pregnant mice
Development and evaluation of a measurement method and system for solar heat gain coefficient and thermal transmittance
Liquified chitosan-alginate multilayer capsules incorporating poly(L-lactic acid) microparticles as cell carriers
We report the development of liquified multilayer hierarchical
capsules capable of providing cell adhesion sites to the encapsulated
cells. The proof of principle is demonstrated with the example of a
chitosan–alginate shell via layer-by-layer assembly, encapsulating
cells adhered to the functionalized surface of poly(L-lactic acid)
microparticles