bluuebunny/crossref_metadata_2025_split huggingface dataset:
L-BAND SPECTROSCOPY WITH MAGELLAN-AO/Clio2: FIRST RESULTS ON YOUNGLOW-MASS COMPANIONS
Authors: Stone Jordan M. , Eisner Josh , Skemer Andy , Morzinski Katie M. , Close Laird , Males Jared , Rodigas Timothy J. , Hinz Phil , Puglisi Alfio 
Published: September 2016

ABSTRACT
L-band spectroscopy is a powerful probe of cool low-gravity atmospheres: the P, Q, and R branch fundamental transitions of methane near 3.3 μm provide a sensitive probe of carbon chemistry; cloud thickness modifies the spectral slope across the band; and

opacity can be used to detect aurorae. Many directly imaged gas-giant companions to nearby young stars exhibit L-band fluxes distinct from the field population of brown dwarfs at the same effective temperature. Here we describe commissioning the L-band spectroscopic mode of Clio2, the 1–5 μm instrument behind the Magellan adaptive-optics system. We use this system to measure L-band spectra of directly imaged companions. Our spectra are generally consistent with the parameters derived from previous near-infrared spectra for these late M to early L type objects. Therefore, deviations from the field sequence are constrained to occur below 1500 K. This range includes the L–T transition for field objects and suggests that observed discrepancies are due to differences in cloud structure and CO/CH4 chemistry.
MAPPING SEYFERT AND LINER EXCITATION MODES IN THE INNER KPC OF NGC 3393
Authors: Maksym W. Peter , Fabbiano Giuseppina , Elvis Martin , Karovska Margarita , Paggi Alessandro , Raymond John , Wang Junfeng , Storchi-Bergmann Thaisa 
Published: September 2016

ABSTRACT
We mapped the extended narrowline region (ENLR) of NGC 3393 on scales of

(

kpc) from the nucleus using emission line images of Hα
λ6563, [O iii]

, and [S ii]

, taken with the Hubble Space Telescope as part of the CHandra survey of Extended Emission line Regions in nearby Seyfert galaxies (CHEERS). By mapping these lines onto a spatially resolved Baldwin–Phillips–Terlevich diagram, we investigate the impact of feedback from a Compton-thick active galactic nucleus on its circumnuclear ISM. We find that the expected Seyfert-like emission within the ionization bicone (

770 pc). We also find a new, figure-8-shaped low ionization emission line region (LINER) cocoon enveloping the bicone and defining a sharp (

pc) transition between higher and lower-ionization zones. These data illustrate the morphological dependence of ionization states of the ENLR relative to bicone and host gas geometries.
EINSTEIN–CARTAN GRAVITY WITH TORSION FIELD SERVING AS AN ORIGIN FOR THE COSMOLOGICAL CONSTANT OR DARK ENERGY DENSITY
Authors: Ivanov A. N. , Wellenzohn M. 
Published: September 2016

ABSTRACT
We analyse the Einstein–Cartan gravity in its standard form


=
R
+



2

, where



and

R

are the Ricci scalar curvatures in the Einstein–Cartan and Einstein gravity, respectively, and



2

is the quadratic contribution of torsion in terms of the contorsion tensor



. We treat torsion as an external (or background) field and show that its contribution to the Einstein equations can be interpreted in terms of the torsion energy–momentum tensor, local conservation of which in a curved spacetime with an arbitrary metric or an arbitrary gravitational field demands a proportionality of the torsion energy–momentum tensor to a metric tensor, a covariant derivative of which vanishes owing to the metricity condition. This allows us to claim that torsion can serve as an origin for the vacuum energy density, given by the cosmological constant or dark energy density in the universe. This is a model-independent result that may explain the small value of the cosmological constant, which is a long-standing problem in cosmology. We show that the obtained result is valid also in the Poincaré gauge gravitational theory of Kibble, where the Einstein–Hilbert action can be represented in the same form:


=
R
+



2

.
TESTING LSST DITHER STRATEGIES FOR SURVEY UNIFORMITY AND LARGE-SCALE STRUCTURE SYSTEMATICS
Authors: Awan Humna , Gawiser Eric , Kurczynski Peter , Jones R. Lynne , Zhan Hu , Padilla Nelson D. , Arancibia Alejandra M. Muñoz , Orsi Alvaro , Cora Sofía A. , Yoachim Peter 
Published: September 2016

ABSTRACT
The Large Synoptic Survey Telescope (LSST) will survey the southern sky from 2022–2032 with unprecedented detail. Since the observing strategy can lead to artifacts in the data, we investigate the effects of telescope-pointing offsets (called dithers) on the r-band coadded 5σ depth yielded after the 10-year survey. We analyze this survey depth for several geometric patterns of dithers (e.g., random, hexagonal lattice, spiral) with amplitudes as large as the radius of the LSST field of view, implemented on different timescales (per season, per night, per visit). Our results illustrate that per night and per visit dither assignments are more effective than per season assignments. Also, we find that some dither geometries (e.g., hexagonal lattice) are particularly sensitive to the timescale on which the dithers are implemented, while others like random dithers perform well on all timescales. We then model the propagation of depth variations to artificial fluctuations in galaxy counts, which are a systematic for LSS studies. We calculate the bias in galaxy counts caused by the observing strategy accounting for photometric calibration uncertainties, dust extinction, and magnitude cuts; uncertainties in this bias limit our ability to account for structure induced by the observing strategy. We find that after 10 years of the LSST survey, the best dither strategies lead to uncertainties in this bias that are smaller than the minimum statistical floor for a galaxy catalog as deep as r < 27.5. A few of these strategies bring the uncertainties close to the statistical floor for r < 25.7 after the first year of survey.
HALL CURRENT EFFECTS IN MEAN-FIELD DYNAMO THEORY
Authors: Lingam Manasvi , Bhattacharjee Amitava 
Published: September 2016

ABSTRACT
The role of the Hall term on large-scale dynamo action is investigated by means of the first-order smoothing approximation. It is shown that the standard α coefficient is altered, and is zero when a specific double Beltrami state is attained, in contrast to the Alfvénic state for magnetohydrodynamical dynamos. The β coefficient is no longer positive definite, and thereby enables dynamo action even if α-quenching were to operate. The similarities and differences with the (magnetic) shear-current effect are pointed out, and a mechanism that may be potentially responsible for

is advanced. The results are compared against previous studies, and their astrophysical relevance is also highlighted.
THE EFFECTS OF KINETIC INSTABILITIES ON SMALL-SCALE TURBULENCE IN EARTH’S MAGNETOSHEATH
Authors: Breuillard H. , Yordanova E. , Vaivads A. , Alexandrova O. 
Published: September 2016

ABSTRACT
The Earth's magnetosheath is the region delimited by the bow shock and the magnetopause. It is characterized by highly turbulent fluctuations covering all scales from MHD down to kinetic scales. Turbulence is thought to play a fundamental role in key processes such as energy transport and dissipation in plasma. In addition to turbulence, different plasma instabilities are generated in the magnetosheath because of the large anisotropies in plasma temperature introduced by its boundaries. In this study we use high-quality magnetic field measurements from Cluster spacecraft to investigate the effects of such instabilities on the small-scale turbulence (from ion down to electron scales). We show that the steepening of the power spectrum of magnetic field fluctuations in the magnetosheath occurs at the largest characteristic ion scale. However, the spectrum can be modified by the presence of waves/structures at ion scales, shifting the onset of the small-scale turbulent cascade toward the smallest ion scale. This cascade is therefore highly dependent on the presence of kinetic instabilities, waves, and local plasma parameters. Here we show that in the absence of strong waves the small-scale turbulence is quasi-isotropic and has a spectral index α ≈ −2.8. When transverse or compressive waves are present, we observe an anisotropy in the magnetic field components and a decrease in the absolute value of α. Slab/2D turbulence also develops in the presence of transverse/compressive waves, resulting in gyrotropy/non-gyrotropy of small-scale fluctuations. The presence of both types of waves reduces the anisotropy in the amplitude of fluctuations in the small-scale range.
RELATIVISTIC MEASUREMENTS FROM TIMING THE BINARY PULSAR PSR B1913+16
Authors: Weisberg J. M. , Huang Y. 
Published: September 2016

ABSTRACT
We present relativistic analyses of 9257 measurements of times-of-arrival from the first binary pulsar, PSR B1913+16, acquired over the last 35 years. The determination of the “Keplerian” orbital elements plus two relativistic terms completely characterizes the binary system, aside from an unknown rotation about the line of sight, leading to a determination of the masses of the pulsar and its companion: 1.438 ± 0.001 M
☉ and 1.390 ± 0.001 M
☉, respectively. In addition, the complete system characterization allows for the creation of relativistic gravitation test by comparing measured and predicted sizes of various relativistic phenomena. We find that the ratio of the observed orbital period decrease caused by gravitational wave damping (corrected by a kinematic term) to the general relativistic prediction is 0.9983 ± 0.0016, thereby confirms the existence and strength of gravitational radiation as predicted by general relativity. For the first time in this system, we have also successfully measured the two parameters characterizing the Shapiro gravitational propagation delay, and found that their values are consistent with general relativistic predictions. For the first time in any system, we have also measured the relativistic shape correction to the elliptical orbit, δ

θ
, although its intrinsic value is obscured by currently unquantified pulsar emission beam aberration. We have also marginally measured the time derivative of the projected semimajor axis, which, when improved in combination with beam aberration modeling from geodetic precession observations, should ultimately constrain the pulsar’s moment of inertia.
MULTI-EPOCH SPECTROSCOPY OF DWARF GALAXIES WITH AGN SIGNATURES: IDENTIFYING SOURCES WITH PERSISTENT BROAD Hα EMISSION
Authors: Baldassare Vivienne F. , Reines Amy E. , Gallo Elena , Greene Jenny E. , Graur Or , Geha Marla , Hainline Kevin , Carroll Christopher M. , Hickox Ryan C. 
Published: September 2016

ABSTRACT
We use time-domain optical spectroscopy to distinguish between broad emission lines powered by accreting black holes (BHs) and stellar processes (i.e., supernovae) for 16 galaxies identified as active galactic nucleus (AGN) candidates by Reines et al (2013). Our study is primarily focused on those objects with narrow emission line ratios dominated by star formation, for which the origin of the broad Hα emission was unclear. Based on follow-up spectroscopy, we find that the broad Hα emission has faded or was ambiguous for all of the star-forming objects (14/16), over baselines ranging from 5–14 years, suggesting a transient stellar process was responsible for the broad emission in previous Sloan Digital Sky Survey observations. For the two objects in our follow-up sample with narrow-line AGN signatures (RGG 9 and RGG 119), we find persistent broad Hα emission consistent with an AGN origin. Additionally, we use high spectral resolution observations to measure stellar velocity dispersions for 15 objects in the Reines et al. (2013) sample, all with narrow-line ratios indicating the presence of an AGN. Stellar masses range from

to

M
⊙, and we measure

in the range of

. These

correspond to some of the lowest-mass galaxies with optical signatures of AGN activity. We show that RGG 119, the one object that has both a measured

and persistent broad Hα emission, falls near the extrapolation of the

relation to the low-mass end.
SUBHALO ACCRETION THROUGH FILAMENTS
Authors: González Roberto E. , Padilla Nelson D. 
Published: September 2016

ABSTRACT
We track subhalo orbits of galaxy- and group-sized halos in cosmological simulations. We identify filamentary structures around halos and use these to define a sample of subhalos accreted from filaments, as well as a control sample of subhalos accreted from other directions. We use these samples to study differences in satellite orbits produced by filamentary accretion. Our results depend on host halo mass. We find that for low masses, subhalos accreted from filaments show ∼10% shorter lifetimes compared to the control sample, show a tendency toward more radial orbits, reach halo central regions earlier, and are more likely to merge with the host. For higher-mass halos this lifetime difference dissipates and even reverses for cluster-sized halos. This behavior appears to be connected to the fact that more massive hosts are connected to stronger filaments with higher velocity coherence and density, with slightly more radial subhalo orbits. Because subhalos tend to follow the coherent flow of the filament, it is possible that such thick filaments are enough to shield the subhalo from the effect of dynamical friction at least during their first infall. We also identify subhalo pairs/clumps that merge with one another after accretion. They survive as a clump for only a very short time, which is even shorter for higher subhalo masses, suggesting that the Magellanic Clouds and other Local group satellite associations may have entered the Milky Way virial radius very recently and probably are in their first infall.
L’intermède de Marcel Broodthaers : pour une critique de l’hybride
Authors: Hillen Sabine 
Published: September 2016

L’hybride qualifie non seulement des productions artistiques revendiquant l’indéterminé mais il renvoie aussi et surtout aujourd’hui à des formes médiatiques normatives ; celles-ci ne répondent plus aux conventions du genre littéraire ou cinématographique. Cette difficulté de référer au genre, Marcel Broodthaers était sur le point de l’éprouver. Nous soulignons dans cet article que si les scènes cinématographiques et les autres décors de sa main font appel à l’intermédialité, telle qu’elle est définie par la critique, ces mêmes œuvres ne font pas encore appel à l’hybride. L’altérité y reçoit une place bien nette. L’intermède de Marcel Broodthaers, qui échappe à une forme précise, questionne, par le choc et le manque de signification, un public encore assuré de ses goûts. En revanche, l’hybride tel que Byung-Chul Han le conçoit, est le signe d’un manque d’immunité et de clôture. Il renvoie à des projets qui s’ouvrent à tous et à tout le monde sans parvenir à susciter une réaction d’immunité. Or, quand l’autre n’est pas reconnu dans son altérité, sa différence ne peut plus être instituée comme une signification.
Outcomes of a conservative approach to management in amoebic liver abscess
Authors: Kale S , Nanavati AJ , Borle N , Nagral S 
Published: September 2016

Context:
Unfortunately, there is confusion among the medical community regarding the management of amoebic liver abscess (ALA). Therapeutic options range from simple pharmacotherapy to use of interventions like a needle or catheter aspiration under ultrasound guidance to surgical intervention. There is a plethora of thresholds for parameters such as the maximum diameter of the abscess and volume on ultrasound examination suggested by various authors to serve as a criterion to help to decide when to use which modality in these cases.

Aims:
To assess the outcome of patients with uncomplicated ALA treated using a conservative approach. Moreover, to identify factors associated with its failure.

Settings and Design:
A prospective, observational study was carried out at a large municipal urban health care center over a period of 3-year (2011–2014) in India.

Materials and Methods:
Patients with uncomplicated ALA were recruited. All patients were managed with pharmacotherapy initially for a period of 72 h. Response to treatment was assessed by resolution of symptoms within the given time frame. Failure to respond was considered an indication for intervention. Needle aspiration was offered to these patients and response assessed within 72 h. Failure to respond to aspiration was considered an indication for catheter drainage. Statistical Analysis Used: Data recorded were entered in a Microsoft Office Excel Sheet and analyzed using the SPSS version 16.0 (IBM).

Results:
Sixty patients with ALA were included in the study over its duration. Forty-nine (81.67%) patients were managed conservatively, while 11 (18.33%) patients needed an intervention for relief. Patients who required intervention had deranged liver function at presentation, a larger abscess diameter (10.09 ± 2.23 vs. 6.33 ± 1.69 cm P < 0.001) and volume (399.73 ± 244.46 vs. 138.34 ± 117.85 ml, P < 0.001) compared to those who did not need it. Patients that required intervention had a longer length of hospital stay (7.1 ± 2.4 vs. 4.8 ± 0.9 days, P < 0.001). On post hoc analysis, a maximum diameter of >7.7 cm was found to be the optimal criterion to predict the need of intervention in cases of ALA.

Conclusions:
A conservative approach is effective in the management of ALA for a majority of patients. Failure of conservative management was predicted by the size of the abscess (maximum diameter >7.7 cm). Even in the cases of failure, a gradual step-up with interventions was found to be safe and effective.
Right atrial mural thrombi
Authors: Vaideeswar P , Chaudhari J , Karnik N , Sahu T , Gupta A 
Published: September 2016

Background:
Right atrial mural thrombi (RAMT) are often seen in association with cardiac diseases or foreign bodies. Unusual locations at the flutter isthmus and the atrial appendage prompted us to evaluate our 2-year autopsy data on such thrombi.

Materials and Methods:
In the 2-year retrospective autopsy, the clinical and autopsy records of patients with RAMT were reviewed, with particular reference to the presence of central venous catheter (CVC), its site of insertion, its type, material and size, its duration of placement, and the drugs infused through the catheter.

Results:
Of the 940 autopsies performed in 2 years, RAMT was seen in 24 hearts and was related to an insertion of a CVC in 23 patients (95.8%). The risk and/or associated factors for this complication were tunneled and polyethylene catheters, Intensive Care Unit admission, infused drugs, underlying cardiac diseases, and pregnancy. A noteworthy feature was the location of the thrombi in the flutter isthmus in 16 hearts (66.7%) and atrial appendage in another six hearts. Localized endocarditis/myocarditis and pulmonary thromboembolism were observed in six and four patients, respectively.

Conclusions:
This autopsy study, which has a high incidence of catheter-related RAMT, does not reflect the true incidence but reiterates the importance of guided insertion of central venous and prompt recognition of thrombus formation.
Reliability of Electrodermal Activity: Quantifying Sensory Processing in Children With Autism
Authors: Schupak Barbara M. , Parasher Raju K. , Zipp Genevieve Pinto 
Published: September 2016

Abstract
OBJECTIVE. We established test–retest reliability of electrodermal markers used to quantify physiological response to sensation using the Sensory Challenge Protocol in children with and without autism spectrum disorder (ASD).
METHOD. Electrodermal activity (EDA) was measured during rest and in response to sensory inputs. Fourteen children with ASD and 18 typically developing children were tested and retested after 2–6 wk on skin conductance response, skin conductance level, nonspecific skin conductance response, and habituation.
RESULTS. Test–retest reliability was evaluated with intraclass correlation coefficients (ICCs). Rest-phase coefficients for both groups were moderate (.65–.73). ICCs during response to sensation ranged from moderate to good for amplitude (.60–.81) and magnitude (.50–.75). In addition, moderate to excellent reliability (.51–.93) was observed for nonspecific response measures.
CONCLUSION. EDA measures are reliable physiological markers that can quantify response to sensation in children with and without ASD.
The Zugspitze radiative closure experiment for quantifying water vapor
absorption over the terrestrial and solar infrared –
Part 3: Quantification of the mid- and near-infrared water vapor continuum
in the 2500 to 7800 cm−1 spectral range under atmospheric conditions
Authors: Reichert Andreas , Sussmann Ralf 
Published: September 2016

Abstract. We present a first quantification of the near-infrared (NIR) water vapor continuum absorption from an atmospheric radiative closure experiment carried out at the Zugspitze (47.42° N, 10.98° E; 2964 m a.s.l.). Continuum quantification is achieved via radiative closure using radiometrically calibrated solar Fourier transform infrared (FTIR) absorption spectra covering the 2500 to 7800 cm−1 spectral range. The dry atmospheric conditions at the Zugspitze site (IWV 1.4 to 3.3 mm) enable continuum quantification even within water vapor absorption bands, while upper limits for continuum absorption can be provided in the centers of window regions. Throughout 75 % of the 2500 to 7800 cm−1 spectral range, the Zugspitze results agree within our estimated uncertainty with the widely used MT_CKD 2.5.2 model (Mlawer et al., 2012). In the wings of water vapor absorption bands, our measurements indicate about 2–5 times stronger continuum absorption than MT_CKD, namely in the 2800 to 3000 cm−1 and 4100 to 4200 cm−1 spectral ranges. The measurements are consistent with the laboratory measurements of Mondelain et al. (2015), which rely on cavity ring-down spectroscopy (CDRS), and the calorimetric–interferometric measurements of Bicknell et al. (2006). Compared to the recent FTIR laboratory studies of Ptashnik et al. (2012, 2013), our measurements are consistent within the estimated errors throughout most of the spectral range. However, in the wings of water vapor absorption bands our measurements indicate typically 2–3 times weaker continuum absorption under atmospheric conditions, namely in the 3200 to 3400, 4050 to 4200, and 6950 to 7050 cm−1 spectral regions.