9,499 research outputs found
On the highly reddened members in 6 young galactic star clusters - a multiwavelength study
The spectral and reddening properties of 211 highly reddened proper motion
members with mag in 6 young galactic star clusters are investigated
using low resolution spectroscopic, broad-band and mid-IR data. We
report emission features in CaII HK and HI lines for a sample of 29 stars
including 11 stars reported for the first time and also provide either a new or
more reliable spectral class for a sample of 24 stars. CaII triplet width
measurements are used to indicate the presence of an accretion disk for a dozen
stars and to hint luminosity for a couple of stars. On the basis of spectral
features, near-IR excesses, dereddened color-color diagrams and mid-IR spectral
indices we identify a group of 28 pre-main sequence cluster members including 5
highly probable Herbig Ae/Be and 6 classical T Tauri star. A total of 25
non-emission MS stars, amounting to 10 % early type MS members, appears
to show Vega-like characteristics or are precursors to such a phenomenon. The
various membership indicators suggest that 16% of the PM members are
non-members. A significant fraction (70%) of program stars in NGC 1976, NGC
2244, NGC 6530 and NGC 6611 show anomalous reddening with =
, , and , respectively,
indicating the presence of grain size dust larger than that typical to the
diffuse medium. A small number of stars in NGC 1976, NGC 2244 and NGC 6611 also
show normal behavior while the cluster NGC 6823 appears to have a normal
reddening. Three highly luminous late type giants, one in NGC 2244 and two in
NGC 6530, appears to be member and are in post-hydrogen-core-burning stages
suggesting a prolonged duration ( 25 Myrs) of star formation.Comment: 12 pages, 13 figures, submitted to MNRA
and bifurcations in rotational bands of diatomic molecules
It is shown that the recently observed bifurcation seen in
superdeformed nuclear bands is also occurring in rotational bands of diatomic
molecules. In addition, signs of a bifurcation, of the same order
of magnitude as the one, are observed both in superdeformed
nuclear bands and rotational bands of diatomic molecules.Comment: LaTex twice, 10 pages and 5 PS figures provided upon demand by the
Author
A Descriptive Study of Nosocomial Infections in an Adult Intensive Care Unit in Fiji: 2011-12
Copyright © 2014 Keshni Naidu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Nosocomial infections in an intensive care unit (ICU) are common and associated with a high mortality but there are no published data from the Oceania region. A retrospective study in Fiji’s largest ICU (2011-12) reported that 114 of a total 663 adult ICU admissions had bacteriological culture-confirmed nosocomial infection. The commonest sites of infection were respiratory and bloodstream. Gram negative bacteria were the commonest pathogens isolated, especially Klebsiella pneumoniae (extended-spectru
Finite Bending of Blocks
The problem of bending of a circular block with concentric hole into ellipsoidal shell is considered, and the earlier results have been obtained as particular cases
Comparative Nutrient Utilization and Growth Performance of Jalauni Lambs and Bundelkhandi Kids Grazed on \u3cem\u3eHardwickia binata\u3c/em\u3e Based Silvopasture System
Goats and sheep play a significant role in the subsistence economy in India. Goats and sheep are multipurpose animals which provide hair, wool, meat, milk and skin. The production of meat from goats and sheep play a vital role in the supply of animal protein for the people of our country. Small ruminant production in village systems in tropical countries is often characterized by poor growth rates and high mortality (Devendra and Burns, 1970). The productivity of small ruminants can be improved by improving the nutrition either through concentrate feeding or provision of additional forage (Pathasarathy et al., 1984). In the present experiment, the animals therefore were allowed to graze in H. binata based silvipasture system to evaluate their nutrient availability from grazing as well as their productive performance
Confusing Sterile Neutrinos with Deviation from Tribimaximal Mixing at Neutrino Telescopes
We expound the impact of extra sterile species on the ultra high energy
neutrino fluxes in neutrino telescopes. We use three types of well-known flux
ratios and compare the values of these flux ratios in presence of sterile
neutrinos, with those predicted by deviation from the tribimaximal mixing
scheme. We show that in the upcoming neutrino telescopes, its easy to confuse
between the signature of sterile neutrinos with that of the deviation from
tribimaximal mixing. We also show that if the measured flux ratios acquire a
value well outside the range predicted by the standard scenario with three
active neutrinos only, it might be possible to tell the presence of extra
sterile neutrinos by observing ultra high energy neutrinos in future neutrino
telescopes.Comment: 22 pages, version to appear in Phys. Rev.
Molecular theory of elastic constants of liquid crystals. III. Application to smectic phases with tilted orientational order
Using the density functional formalism we derive expression for the
distortion free energy for systems with continuous broken symmetry and use it
to derive expression for the elastic constants of smectic phases in which
director is tilted with respect to the smectic layer normal. As in the previous
papers of the series (Phys. Rev. A {\bf 45}, 974 (1992), E {\bf 49}, 501,
(1994)) the expressions for the elastic constants are written in terms of order
and structural parameters. The structural parameters involve the generalised
spherical harmonic coefficients of the direct pair correlation function of an
effective isotropic liquid. The density of this effective isotropic liquid
depends on the nature and amount of ordering present in the system and is
evaluated self- consistently. We estimate the value of elastic constants using
reasonable guess for the order and structural- parameters.Comment: 31 pages; 1 Fig. in GIF format, To be appear in Phys. Rev.
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