pinecone/core-2020-05-10-deduplication huggingface dataset:
Atomic data from the Iron Project. LXIV. Radiative transition rates and
  collision strengths for Ca II

This work reports radiative transition rates and electron impact excitation
rate coefficients for levels of the n= 3, 4, 5, 6, 7, 8 configurations of Ca
II. The radiative data were computed using the Thomas-Fermi-Dirac central
potential method in the frozen core approximation and includes the polarization
interaction between the valence electron and the core using a model potential.
This method allows for configuration interactions (CI) and relativistic effects
in the Breit-Pauli formalism. Collision strengths in LS-coupling were
calculated in the close coupling approximation with the R-matrix method. Then,
fine structure collision strengths were obtained by means of the
intermediate-coupling frame transformation (ICFT) method which accounts for
spin-orbit coupling effects. We present extensive comparisons with the most
recent calculations and measurements for Ca II as well as a comparison between
the core polarization results and the "unpolarized" values. We find that core
polarization affects the computed lifetimes by up to 20%. Our results are in
very close agreement with recent measurements for the lifetimes of metastable
levels. The present collision strengths were integrated over a Maxwellian
distribution of electron energies and the resulting effective collision
strengths are given for a wide range of temperatures. Our effective collision
strengths for the resonance transitions are within ~11% from previous values
derived from experimental measurements, but disagree with latter computations
using the distorted wave approximation.Comment: 8 pages, 4 figures. The atomic data from this work, including energy
  levels, A-values, and effective collision strengths, is available in
  electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr
  (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A
Direct diameter measurement of a star filling its Roche Lobe: The
  semi-detached binary SS Leporis spatially resolved with VINCI/VLTI

Stellar evolution in close binary systems is strongly influenced by mass
transfer from one star to the other when one component fills its zero-velocity
surface or Roche Lobe. SS Lep is a fairly nearby close binary showing the Algol
paradox and a shell spectrum, both indicative of (past) mass transfer. To study
the process of mass transfer and its evolutionary consequences, we aim at a
direct characterisation of the spatial dimensions of the different components
of SS Lep with IR interferometry. We use VINCI/VLTI interferometric
observations in the K band and photometric observations from the UV to the
far-IR. The visibilities are interpreted with simple geometrical models and the
Spectral Energy Distribution (SED) is decomposed into the three main
components: A star, M star and dust shell/disk. From the SED, we find that the
main emitters in the K band are the M star and the circumstellar environment.
Both are spatially resolved with the VINCI observations, showing the excess to
be circumbinary and showing the M star to have a size equal to its Roche Lobe.
We conclude that we have, for the first time, directly resolved a star filling
its Roche Lobe. The resulting mass transfer is probably the cause of (1) the
circumbinary dust disk of which we see the hot inner region spatially resolved
in our observations, (2) the unusually high luminosity of the A star and (3)
the shell spectrum seen in the UV and optical spectra.Comment: 4 pages, 2 figures, accepted for publication in A&A Letters on
  26/05/200
(No) dynamical constraints on the mass of the black hole in two ULXs.

We present the preliminary results of two Gemini campaigns to constrain the mass of the black hole in an ultraluminous X-ray source (ULX) via optical spectroscopy. Pilot studies of the optical counterparts of a number of ULXs revealed two candidates for further detailed study, based on the presence of a broad He II 4686 Å emission line. A sequence of 10 long-slit spectra were obtained for each object, and the velocity shift of the ULX counterpart measured. Although radial velocity variations are observed, they are not sinusoidal, and no mass function is obtained. However, the broad He II line is highly variable on timescales shorter than a day. If associated with the reprocessing of X-rays in the accretion disc, its breadth implies that the disc must be close to face-on
Fecal concentrations of cortisol, testosterone, and progesterone in cotton-top tamarins hosted in different zoological parks: Relationship among physiological data, environmental conditions and behavioral patterns

The aim of this investigation was to study the welfare of 3 captive groups of cotton-top tamarins housed in different zoological parks. Ethological observations were conducted during 1 year. In addition, fecal samples were collected and the concentrations of glucocorticoids, androgens, and progestogens were measured. Within each group, no significant differences in fecal cortisol concentrations were found between subjects. The fecal concentrations of testosterone and progesterone significantly differed depending on the sexes and ages of the tamarins. A significant association was found among hormone concentrations, exhibit dimensions, and group composition. A highly significant correlation was found between all hormones considered and the space available for each subject. Significant differences in behavioral patterns were observed among groups, including social–individual, affiliative–aggressive, and anogenital–suprapubic scent marking. Correlations between hormone measurements and behaviors were detected. In conclusion, this study confirmed the associations between some behaviors exhibited by these nonhuman primates and both cortisol and testosterone; these data also highlight the role played by progesterone in these behaviors.Florence Universit
Mixed Artin-Tate motives over number rings

This paper studies Artin-Tate motives over number rings. As a subcategory of
geometric motives, the triangulated category of Artin-Tate motives DATM(S) is
generated by motives of schemes that are finite over the base S. After
establishing stability of these subcategories under pullback and pushforward
along open and closed immersions, a motivic t-structure is constructed.
Exactness properties of these functors familiar from perverse sheaves are shown
to hold in this context. The cohomological dimension of mixed Artin-Tate
motives is two, and there is an equivalence of the triangulated category of
Artin-Tate motives with the derived category of mixed Artin-Tate motives.
  Update in second version: a functorial and strict weight filtration for mixed
Artin-Tate motives is established. Moreover, two minor corrections have been
performed: first, the category of Artin-Tate motives is now defined to be the
triangulated category generated by direct factors of $f_* \mathbf 1(n)$---as
opposed to the thick category generated by these generators. Secondly, the
exactness of $f^*$ for a finite map is only stated for etale maps $f$
CHESS, Chemical Herschel surveys of star forming regions:Peering into
  the protostellar shock L1157-B1

The outflow driven by the low-mass class 0 protostar L1157 is the prototype
of the so-called chemically active outflows. The bright bowshock B1 in the
southern outflow lobe is a privileged testbed of magneto-hydrodynamical (MHD)
shock models, for which dynamical and chemical processes are strongly
interdependent. We present the first results of the unbiased spectral survey of
the L1157-B1 bowshock, obtained in the framework of the key program "Chemical
Herschel Surveys of Star Forming Regions" (CHESS). The main aim is to trace the
warm and chemically enriched gas and to infer the excitation conditions in the
shock region. The CO 5-4 and H2O lines have been detected at high-spectral
resolution in the unbiased spectral survey of the HIFI-Band 1b spectral window
(555-636 GHz), presented by Codella et al. in this volume. Complementary
ground-based observations in the submm window help establish the origin of the
emission detected in the main-beam of HIFI, and the physical conditions in the
shock.}{Both lines exhibit broad wings, which extend to velocities much higher
than reported up to now. We find that the molecular emission arises from two
regions with distinct physical conditions: an extended, warm (100K), dense (3e5
cm-3) component at low-velocity, which dominates the water line flux in Band~1;
a secondary component in a small region of B1 (a few arcsec) associated with
high-velocity, hot (> 400 K) gas of moderate density ((1.0-3.0)e4 cm-3), which
appears to dominate the flux of the water line at 179mu observed with PACS. The
water abundance is enhanced by two orders of magnitude between the low- and the
high-velocity component, from 8e-7 up to 8e-5. The properties of the
high-velocity component agree well with the predictions of steady-state C-shock
models.Comment: Accepted for Publication in Astronomy and Astrophysics (Herschel
  Special Issue
InAs/InP single quantum wire formation and emission at 1.5 microns

Isolated InAs/InP self-assembled quantum wires have been grown using in situ
accumulated stress measurements to adjust the optimal InAs thickness. Atomic
force microscopy imaging shows highly asymmetric nanostructures with average
length exceeding more than ten times their width. High resolution optical
investigation of as-grown samples reveals strong photoluminescence from
individual quantum wires at 1.5 microns. Additional sharp features are related
to monolayer fluctuations of the two dimensional InAs layer present during the
early stages of the quantum wire self-assembling process.Comment: 4 pages and 3 figures submitted to Applied Physics Letter
Ionisation in atmospheres of Brown Dwarfs and extrasolar planets III.
  Breakdown conditions for mineral clouds

Electric discharges were detected directly in the cloudy atmospheres of
Earth, Jupiter and Saturn, are debatable for Venus, and indirectly inferred for
Neptune and Uranus in our solar system. Sprites (and other types of transient
luminous events) have been detected only on Earth, and are theoretically
predicted for Jupiter, Saturn and Venus. Cloud formation is a common phenomenon
in ultra-cool atmospheres such as in Brown Dwarf and extrasolar planetary
atmospheres. Cloud particles can be expected to carry considerable charges
which may trigger discharge events via small-scale processes between individual
cloud particles (intra-cloud discharges) or large-scale processes between
clouds (inter-cloud discharges). We investigate electrostatic breakdown
characteristics, like critical field strengths and critical charge densities
per surface, to demonstrate under which conditions mineral clouds undergo
electric discharge events which may trigger or be responsible for sporadic
X-ray emission. We apply results from our kinetic dust cloud formation model
that is part of the Drift-Phoenix model atmosphere simulations. We present a
first investigation of the dependence of the breakdown conditions in Brown
Dwarf and giant gas exoplanets on the local gas-phase chemistry, the effective
temperature and primordial gas-phase metallicity. Our results suggest that
different intra-cloud discharge processes dominate at different heights inside
mineral clouds: local coronal (point discharges) and small-scale sparks at the
bottom region of the cloud where the gas density is high, and flow discharges
and large-scale sparks near, and maybe above, the cloud top. The comparison of
the thermal degree of ionisation and the number density of cloud particles
allows us to suggest the efficiency with which discharges will occur in
planetary atmospheres.Comment: accepted by Ap
Elastic and large t rapidity gap vector meson production in
  ultraperipheral proton-ion collisions

We evaluate the cross sections for the production of vector mesons in
exclusive ultraperipheral proton-ion collisions at LHC. We find that the rates
are high enough to study the energy and momentum transfer dependence of vector
mesons - rho,phi, J/psi, Upsilon photoproduction in gamma p scattering in a
wide energy range extending the measurements which were performed at HERA,
providing new information about interplay of soft and hard physics in
diffraction. Also, we calculate the contributions to the vector meson yield due
to production of vector mesons off nuclear target by photons emitted by proton.
We find, that least in the case of Upsilon production it is feasible to observe
simultaneously both these processes. Such measurements would increase the
precision with which the A-dependence of exclusive onium production can be
determined. This would also enable one to estimate the amount of nuclear gluon
shadowing of generalized gluon distributions at much smaller x than that is
possible in AA collisions and to measure the cross sections for photoproduction
processes in a significantly wider energy range than that achieved in
experiments with fixed nuclear targets. We also present the cross section for
vector meson production in pA collisions at RHIC. In addition, we consider
production of vector mesons off protons with large rapidity gaps and large t.
These processes probe small x dynamics of the elastic interaction of small
dipoles at high energies and large but finite t, that is in the kinematics
where DGLAP evolution is strongly suppressed. We estimate that this process
could be studied at LHC up to W ~1 TeV with detectors which will be available
at LHC.Comment: 21 pages, 9 figures, a reference to experimental data is adde
A new scenario for the origin of the 3/2 resonant system HD45364

In this paper we revise the model proposed by Rein et al. (2010) for the
origin of the HD45364 exoplanetary system, currently known to host two planets
close to the 3/2 mean-motion commensurability (MMR). We show that, due to high
surface density of the protoplanetary disk needed for Type III migration, this
model could only lead to planets in a quasi-resonant regime of motion, and thus
not consistent with the resonant configuration obtained by Correia et al.
(2009). Although both resonant and quasi-resonant solutions are statistically
indistinguishable with respect to radial velocity measurements, their distinct
dynamical behaviour is intriguing. We use the semi-analytical model to confirm
the quantitative difference between two configurations. In order to form a
system evolving inside the 3/2 resonance, we develop a different model. Our
scenario includes an interaction between different (but slower) planetary
migration types, planet growth, and gap formation in the protoplanetary disk.
The choice of the described evolutionary path was due to a detailed analysis of
the structure of the phase space in the vicinity of the 3/2 MMR employing
dynamical mapping techniques. The outcomes of our simulations are able to
reproduce very closely the 3/2 resonant dynamics obtained from the best-fit
presented by Correia et al. (2009). In addition, varying the strength of the
eccentricity damping, we can also simulate the quasi-resonant configuration
similar to that in Rein et al. (2010). We furthermore show that our scenario is
robust with respect to the physical parameters involved in the resonance
trapping process. However, the confirmation of our scenario will be possible
only with additional radial velocities measurements.Comment: 11 pages, 12 figures: A&A accepted: present in Protostars & Planets
  VI, Heidelberg, German
dS/CFT at uniform energy density and a de Sitter "bluewall"

We describe a class of spacetimes that are asymptotically de Sitter in the
Poincare slicing. Assuming that a dS/CFT correspondence exists, we argue that
these are gravity duals to a CFT on a circle leading to uniform energy-momentum
density, and are equivalent to an analytic continuation of the Euclidean AdS
black brane. These are solutions with a complex parameter which then gives a
real energy-momentum density. We also discuss a related solution with the
parameter continued to a real number, which we refer to as a de Sitter
"bluewall". This spacetime has two asymptotic de Sitter universes and Cauchy
horizons cloaking timelike singularities. We argue that the Cauchy horizons
give rise to a blue-shift instability.Comment: Latex, 13pgs, 2 figs. v2: 14pgs, published version, some rephrasing
  of language in terms of Euclidean CFT on a circle, more elaborate discussion
  on blueshif
The applicability of FIR fine-structure lines as Star Formation Rate
  tracers over wide ranges of metallicities and galaxy types

We analyze the applicability of far-infrared fine-structure lines [CII] 158
micron, [OI] 63 micron and [OIII] 88 micron to reliably trace the star
formation rate (SFR) in a sample of low-metallicity dwarf galaxies from the
Herschel Dwarf Galaxy Survey and compare with a broad sample of galaxies of
various types and metallicities in the literature. We study the trends and
scatter in the relation between the SFR (as traced by GALEX FUV and MIPS 24
micron) and far-infrared line emission, on spatially resolved and global galaxy
scales, in dwarf galaxies. We assemble far-infrared line measurements from the
literature and infer whether the far-infrared lines can probe the SFR (as
traced by the total-infrared luminosity) in a variety of galaxy populations. In
metal-poor dwarfs, the [OI] and [OIII] lines show the strongest correlation
with the SFR with an uncertainty on the SFR estimates better than a factor of
2, while the link between [CII] emission and the SFR is more dispersed
(uncertainty factor of 2.6). The increased scatter in the SFR-L([CII]) relation
towards low metal abundances, warm dust temperatures, large filling factors of
diffuse, highly ionized gas suggests that other cooling lines start to dominate
depending on the density and ionization state of the gas. For the literature
sample, we evaluate the correlations for a number of different galaxy
populations. The [CII] and [OI] lines are considered to be reliable SFR tracers
in starburst galaxies, recovering the star formation activity within an
uncertainty of factor 2. [Abridged]Comment: 35 pages, 13 figures, accepted for publication in A&A on May 7th 201
Higgsphobic and fermiophobic Z' as a single dark matter candidate

A spin-1 Z' particle as a single dark matter candidate is investigated by
assuming that it does not directly couple to the Higgs boson and standard model
fermions and does not mix with the photon and Z boson. The remaining dominant
vertices are quartic Z'Z'ZZ and Z'Z'W+W-, which can induce effective
Z'Z'q\bar{q} couplings through standard-model gauge-boson loops. We discuss
constraints from the cosmological thermal relic density, and direct and
indirect-detection experiments, and find that a dark Z' can only exist above
the W boson mass threshold, and the effective quartic coupling of Z'Z'VV is
bounded in the region of 10^{-3}~10^{-2}.Comment: 18pages, 14 figure
Optical Hybrid Quantum Information Processing

Historically, two complementary approaches to optical quantum information
processing have been pursued: qubits and continuous-variables, each exploiting
either particle or wave nature of light. However, both approaches have pros and
cons. In recent years, there has been a significant progress in combining both
approaches with a view to realizing hybrid protocols that overcome the current
limitations. In this chapter, we first review the development of the two
approaches with a special focus on quantum teleportation and its applications.
We then introduce our recent research progress in realizing quantum
teleportation by a hybrid scheme, and mention its future applications to
universal and fault-tolerant quantum information processing
Non-linear Tearing of 3D Null Point Current Sheets

The manner in which the rate of magnetic reconnection scales with the
Lundquist number in realistic three-dimensional (3D) geometries is still an
unsolved problem. It has been demonstrated that in 2D rapid non-linear tearing
allows the reconnection rate to become almost independent of the Lundquist
number (the `plasmoid instability'). Here we present the first study of an
analogous instability in a fully 3D geometry, defined by a magnetic null point.
The 3D null current layer is found to be susceptible to an analogous
instability, but is marginally more stable than an equivalent 2D
Sweet-Parker-like layer. Tearing of the sheet creates a thin boundary layer
around the separatrix surface, contained within a flux envelope with a
hyperbolic structure that mimics a spine-fan topology. Efficient mixing of flux
between the two topological domains occurs as the flux rope structures created
during the tearing process evolve within this envelope. This leads to a
substantial increase in the rate of reconnection between the two domains.Comment: Submitted to Physics of Plasmas (11 pages, 9 figures
Continuous integral kernels for unbounded Schroedinger semigroups and
  their spectral projections

By suitably extending a Feynman-Kac formula of Simon [Canadian Math. Soc.
Conf. Proc, 28 (2000), 317-321], we study one-parameter semigroups generated by
(the negative of) rather general Schroedinger operators, which may be unbounded
from below and include a magnetic vector potential. In particular, a common
domain of essential self-adjointness for such a semigroup is specified.
Moreover, each member of the semigroup is proven to be a maximal Carleman
operator with a continuous integral kernel given by a Brownian-bridge
expectation. The results are used to show that the spectral projections of the
generating Schroedinger operator also act as Carleman operators with continuous
integral kernels. Applications to Schroedinger operators with rather general
random scalar potentials include a rigorous justification of an integral-kernel
representation of their integrated density of states - a relation frequently
used in the physics literature on disordered solids.Comment: 41 pages. Final version. Dedicated to Volker Enss on the occasion of
  his 60th birthda
Plancherel formula for Berezin deformation of $L^2$ on Riemannian
  symmetric space

Consider the space B of complex $p\times q$ matrces with norm <1. There
exists a standard one-parameter family $S_a$ of unitary representations of the
pseudounitary group U(p,q) in the space of holomorphic functions on B (i.e.
scalar highest weight representations). Consider the restriction $T_a$ of $S_a$
to the pseudoorthogonal group O(p,q).
  The representation of O(p,q) in $L^2$ on the symmetric space
$O(p,q)/O(p)\times O(q)$ is a limit of the representations $T_a$ in some
precise sence. Spectrum of a representation $T_a$ is comlicated and it depends
on $\alpha$.
  We obtain the complete Plancherel formula for the representations $T_a$ for
all admissible values of the parameter $\alpha$. We also extend this result to
all classical noncompact and compact Riemannian symmetric spaces
What can we learn from hydrodynamic analysis of elliptic flow?

We can establish a new picture, the perfect fluid sQGP core and the
dissipative hadronic corona, of the space-time evolution of produced matter in
relativistic heavy ion collisions at RHIC. It is also shown that the picture
works well also in the forward rapidity region through an analysis based on a
new class of the hydro-kinetic model and is a manifestation of deconfinement.Comment: 4 pages, 4 figures, talk given at Quark Matter 2005, 18th
  Internationl Conference on Nucleus-Nucleus Interactions, August 4-9, 2005,
  Budapest, Hungar