bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evidence for a Chandrasekhar-mass explosion in the Ca-strong 1991bg-like type Ia supernova 2016hnk
Authors: Galbany L. , Ashall C. , Höflich P. , González-Gaitán S. , Taubenberger S. , Stritzinger M. , Hsiao E. Y. , Mazzali P. , Baron E. , Blondin S. , Bose S. , Bulla M. , Burke J. F. , Burns C. R. , Cartier R. , Chen P. , Della Valle M. , Diamond T. R. , Gutiérrez C. P. , Harmanen J. , Hiramatsu D. , Holoien T. W.-S. , Hosseinzadeh G. , Howell D. Andrew , Huang Y. , Inserra C. , de Jaeger T. , Jha S. W. , Kangas T. , Kromer M. , Lyman J. D. , Maguire K. , Marion G. Howie , Milisavljevic D. , Prentice S. J. , Razza A. , Reynolds T. M. , Sand D. J. , Shappee B. J. , Shekhar R. , Smartt S. J. , Stassun K. G. , Sullivan M. , Valenti S. , Villanueva S. , Wang X. , Wheeler J. Craig , Zhai Q. , Zhang J. 
Published: August 2019

Aims. We present a comprehensive dataset of optical and near-infrared photometry and spectroscopy of type Ia supernova (SN) 2016hnk, combined with integral field spectroscopy (IFS) of its host galaxy, MCG -01-06-070, and nearby environment. Our goal with this complete dataset is to understand the nature of this peculiar object.
Methods. Properties of the SN local environment are characterized by means of single stellar population synthesis applied to IFS observations taken two years after the SN exploded. We performed detailed analyses of SN photometric data by studying its peculiar light and color curves. SN 2016hnk spectra were compared to other 1991bg-like SNe Ia, 2002es-like SNe Ia, and Ca-rich transients. In addition, we used abundance stratification modeling to identify the various spectral features in the early phase spectral sequence and also compared the dataset to a modified non-LTE model previously produced for the sublumnious SN 1999by.
Results. SN 2016hnk is consistent with being a subluminous (MB = −16.7 mag, sBV=0.43 ± 0.03), highly reddened object. The IFS of its host galaxy reveals both a significant amount of dust at the SN location, residual star formation, and a high proportion of old stellar populations in the local environment compared to other locations in the galaxy, which favors an old progenitor for SN 2016hnk. Inspection of a nebular spectrum obtained one year after maximum contains two narrow emission lines attributed to the forbidden [Ca II] λλ7291,7324 doublet with a Doppler shift of 700 km s−1. Based on various observational diagnostics, we argue that the progenitor of SN 2016hnk was likely a near Chandrasekhar-mass (MCh) carbon-oxygen white dwarf that produced 0.108 M⊙ of 56Ni. Our modeling suggests that the narrow [Ca II] features observed in the nebular spectrum are associated with 48Ca from electron capture during the explosion, which is expected to occur only in white dwarfs that explode near or at the MCh limit.
Spatially resolved spectroscopy of the debris disk HD 32297
Authors: Bhowmik T. , Boccaletti A. , Thébault P. , Kral Q. , Mazoyer J. , Milli J. , Maire A. L. , van Holstein R. G. , Augereau J.-C. , Baudoz P. , Feldt M. , Galicher R. , Henning T. , Lagrange A.-M. , Olofsson J. , Pantin E. , Perrot C. 
Published: August 2019

Context. Spectro-photometry of debris disks in total intensity and polarimetry can provide new insight into the properties of the dust grains therein (size distribution and optical properties).
Aims. We aim to constrain the morphology of the highly inclined debris disk HD 32297. We also intend to obtain spectroscopic and polarimetric measurements to retrieve information on the particle size distribution within the disk for certain grain compositions.
Methods. We observed HD 32297 with SPHERE in Y, J, and H bands in total intensity and in J band in polarimetry. The observations are compared to synthetic models of debris disks and we developed methods to extract the photometry in total intensity overcoming the data-reduction artifacts, namely the self-subtraction. The spectro-photometric measurements averaged along the disk mid-plane are then compared to model spectra of various grain compositions.
Results. These new images reveal the very inner part of the system as close as 0.15″. The disk image is mostly dominated by the forward scattering making one side (half-ellipse) of the disk more visible, but observations in total intensity are deep enough to also detect the back side for the very first time. The images as well as the surface brightness profiles of the disk rule out the presence of a gap as previously proposed. We do not detect any significant asymmetry between the northeast and southwest sides of the disk. The spectral reflectance features a “gray to blue” color which is interpreted as the presence of grains far below the blowout size.
Conclusions. The presence of sub-micron grains in the disk is suspected to be the result of gas drag and/or “avalanche mechanisms”. The blue color of the disk could be further investigated with additional total intensity and polarimetric observations in K and H bands respectively to confirm the spectral slope and the fraction of polarization.
The influence of Hinode/SOT NFI instrumental effects on the visibility of simulated prominence fine structures in Hα
Authors: Gunár S. , Jurčák J. , Ichimoto K. 
Published: August 2019

Context. Models of entire prominences with their numerous fine structures distributed within the prominence magnetic field use approximate radiative transfer techniques to visualize the simulated prominences. However, to accurately compare synthetic images of prominences obtained in this way with observations and to precisely analyze the visibility of even the faintest prominence features, it is important to take into account the influence of instrumental properties on the synthetic spectra and images.
Aims. In the present work, we investigate how synthetic Hα images of simulated prominences are impacted by the instrumental effects induced by the Narrowband Filter Imager (NFI) of the Solar Optical Telescope (SOT) onboard the Hinode satellite.
Methods. To process the synthetic Hα images provided by 3D Whole-Prominence Fine Structure (WPFS) models into SOT-like synthetic Hα images, we take into account the effects of the integration over the theoretical narrow-band transmission profile of NFI Lyot filter, the influence of the stray-light and point spread function (PSF) of Hinode/SOT, and the observed noise level. This allows us to compare the visibility of the prominence fine structures in the SOT-like synthetic Hα images with the synthetic Hα line-center images used by the 3D models and with a pair of Hinode/SOT NFI observations of quiescent prominences.
Results. The comparison between the SOT-like synthetic Hα images and the synthetic Hα line-center images shows that all large and small-scale features are very similar in both visualizations and that the same very faint prominence fine structures can be discerned in both. This demonstrates that the computationally efficient Hα line-center visualization technique can be reliably used for the purpose of visualization of complex 3D prominence models. In addition, the qualitative comparison between the SOT-like synthetic images and prominence observations shows that the 3D WPFS models can reproduce large-scale prominence features rather well. However, the distribution of the prominence fine structures is significantly more diffuse in the observations than in the models and the diffuse intensity areas surrounding the observed prominences are also not present in the synthetic images. We also found that the maximum intensities reached in the models are about twice as high as those present in the observations–an indication that the mass-loading assumed in the present 3D WPFS models might be too large.
Optical characterization of WISE selected blazar candidates
Authors: de Menezes Raniere , Peña-Herazo Harold A. , Marchesini Ezequiel J. , D’Abrusco Raffaele , Masetti Nicola , Nemmen Rodrigo , Massaro Francesco , Ricci Federica , Landoni Marco , Paggi Alessandro , Smith Howard A. 
Published: August 2019

Context. Over the last decade more than five thousand γ-ray sources have been detected by the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope. Given the positional uncertainty of the telescope, nearly 30% of these sources remain without an obvious counterpart at lower energies. This has motivated the release of new catalogs of γ-ray counterpart candidates and several follow up campaigns in the last decade.
Aims. Recently, two new catalogs of blazar candidates were released. These are the improved and expanded version of the WISE Blazar-Like Radio-Loud Sources (WIBRaLS2) catalog and the Kernel Density Estimation selected candidate BL Lacs (KDEBLLACS) catalog, both selecting blazar-like sources based on their infrared colors from the Wide-field Infrared Survey Explorer (WISE). In this work we characterize these two catalogs, clarifying the true nature of their sources based on their optical spectra from SDSS data release 15, thus testing their efficiency in selecting true blazars.
Methods. We first selected all WIBRaLS2 and KDEBLLACS sources with available optical spectra in the footprint of Sloan Digital Sky Survey data release 15. We then analyzed these spectra to verify the nature of each selected candidate and to measure the fraction of the catalogs composed by spectroscopically confirmed blazars. Finally, we evaluated the impact of selection effects, especially those related to optical colors of WIBRaLS2/KDEBLLACS sources and their optical magnitude distributions.
Results. We found that at least ∼30% of each catalog is made up of confirmed blazars, with quasars being the major contaminants in the case of WIBRaLS2 (≈58%) and normal galaxies in the case of KDEBLLACS (≈38.2%). The spectral analysis also allowed us to identify the nature of 11 blazar candidates of uncertain type (BCUs) from the Fermi-LAT fourth Point Source Catalog (4FGL) and to find 25 new BL Lac objects.
Medikamenteninduzierter Diabetes mellitus
Authors: Joost Hans-Georg 
Published: August 2019

ZusammenfassungZahlreiche Pharmaka können die Glukosehomöostase stören und eine reduzierte Glukosetoleranz oder einen Diabetes mellitus verursachen. Diese Komplikation ist häufig (10–20 %) unter Glukokortikoiden, Statinen, Immunsuppressiva, mehreren Zytostatika sowie HIV-Virostatika. Der medikamenteninduzierte Diabetes entspricht meistens einem Typ-2-Diabetes, aber auch insulinpflichtiger Autoimmundiabetes ist nach Interferon alpha oder einer Tumorimmuntherapie beschrieben. Der medikamenteninduzierte Diabetes muss therapeutische Konsequenzen haben, selbst wenn die Hyperglykämie moderat ist, da mit Sekundärkomplikationen des Diabetes gerechnet werden muss.
Postoperative Venous Thromboembolism Prophylaxis: Changes in the Daily Clinical Practice, Modified Guidelines
Authors: Samama Charles Marc 
Published: August 2019

AbstractWith current clinical practice, postoperative venous thromboembolism (VTE) risk is not only well controlled, but it is steadily decreasing, especially in orthopaedic surgery, thanks to fast-track and day case procedures, new surgical techniques, and potent antithrombotic agents. Thromboprophylaxis is becoming increasingly adapted to these patients. Aspirin is also extensively prescribed in total hip replacement and total knee replacement procedures in the United States and Australia. Mechanical prophylaxis is sometimes applied alone but most often combined with anticoagulant agents. However, large evidence-based studies are still needed to confirm these optimistic tendencies. In the meantime, physicians have to keep strong control over the VTE risk to prevent the reappearance of pulmonary embolism after admission to the surgical wards.
SOBIR1/EVR prevents precocious initiation of fiber differentiation during wood development through a mechanism involving BP and ERECTA
Authors: Milhinhos Ana , Vera-Sirera Francisco , Blanco-Touriñán Noel , Mari-Carmona Cristina , Carrió-Seguí Àngela , Forment Javier , Champion Clément , Thamm Anna , Urbez Cristina , Prescott Helen , Agustí Javier 
Published: August 2019

Significance
Secondary growth (thickening of stems and roots) provides the mechanical support that plants need to grow and sustain their structures, and results in wood formation. Although wood accounts for the largest proportion of terrestrial biomass, the identification through classical genetics of key elements that control secondary growth is hampered by the challenge of phenotyping traits associated with inner tissues. We have taken advantage of natural genetic variation to identify SOBIR1/EVR, a gene previously known for its involvement in plant immunity and abscission, as a regulator of the process, and demonstrate that it prevents precocious formation of xylem fiber cells through a mechanism that involves the activity of previously discovered master regulators of xylem fiber development.
Applying functional language analysis approach in Chinese college English reading classes
Authors: Sun Yinghui , Zhang Fang 
Published: August 2019

ABSTRACT
This paper describes a study that applies Functional Language Analysis (FLA) in Chinese college English reading context to promote students’ understanding of the reading texts. Different from other commonly practiced reading activities, FLA encourages students to explore text meanings from aspects of content, organization and attitude, and how clues of lexical and grammatical resources help construct these three meanings. Thirty freshmen from a university in Beijing, China received FLA instruction for four months. Data were collected from students’ analysis of reading tasks, presentations, and questionnaires. The study found that FLA is effective in facilitating Chinese students’ active exploration of the text. Specifically, through an examination of participants, processes, and circumstances, students were able to comprehend the content meaning accurately. With attention paid to themes, conjunctions, and other linking devices, they could picture the text structure. They also started to understand the author’s attitude by examining grammatical elements of formality, voice, mood, and modality. Additionally, FLA helped improve students’ confidence and interest in English reading. Positive influences of this approach on students’ other English skills such as listening, writing, and speaking were also reported. The findings suggest that FLA can be successfully implemented in Chinese reading classes.
Period investigation of Algol systems TZ Eri and TU Her
Authors: Wang Zhi-Hua , Zhu Li-Ying , Li Lin-Jia , Tian Xiao-Man 
Published: August 2019

Abstract
TZ Eri and TU Her are both classic Algol-type systems (Algols). By observing and collecting times of minimum light, we constructed the O – C curves for the two systems. The long-time upward and downward parabolas shown in these diagrams are considered to be the result of the combination of mass transfer and angular momentum loss. The secular orbital period change rates are dP/dt = 4.74(± 0.12) × 10−7 d yr−1 and dP/dt = −2.33(± 0.01)× 10−6 d yr−1, respectively. There are also cyclic variations in their O – C curves which might be caused by the light-travel time effect (LTTE). A circumbinary star may exist in the TZ Eri system with a mass of at least 1.34 M
⊙, while there are possibly two celestial bodies that almost follow a 2 : 1 resonance orbit around the TU Her binary pair. Their masses are at least 2.43 M
⊙ and 1.27 M
⊙.
From multicolor-photometric observations to a guaranteed mass of AL Cas
Authors: Wang Ya-Hui , Liu Jin-Zhong , Lu Li-Na , Lü Guo-Liang 
Published: August 2019

Abstract
We utilize the PAdova and TRieste Stellar Evolution Code (PARSEC) combined with photometric observations to determine a guaranteed mass of AL Cas and re-examine its related physical parameters. Multicolor-photometric observations of AL Cas have been performed in 2016 and 2017. We use the Wilson-Devinney (W-D) code to analyze the light curves and find that AL Cas is probably an A-subtype contact binary (f = 35.7±0.9%) with a mass ratio q = 0.6399±0.0230 and an effective temperature difference ΔT = 78 K. The mass-radius relation of a higher luminosity component for AL Cas is obtained by two methods: depending on calculation of the Roche lobe (DCRL method) and depending on calculation of the W-D code (DCWD method). Using this relationship with the PARSEC model, we investigate the component masses of AL Cas as M
1 = 1.19±0.23 M
⊙ with M
2 = 0.76±0.18 M
⊙ by the DCRL method and M
1 = 1.22±0.26 M
⊙ with M
2 = 0.78±0.20 M
⊙ by the DCWD method. By means of the photometric studies, we examine the related physical properties of AL Cas with the latest findings. We update the orbital period (P
orb = 0.50055593 d) of AL Cas according to six new times of light minimum together with those collected from the literature. Meanwhile, the (O – C)2 curve analysis suggests that the orbital period of AL Cas has a cyclic variation with a period of 81.25 yr and an amplitude of 0.01415 d. This cyclic change would be caused by the light-travel time effect from a third body. A similar mass of the third body (M
3 sin i′ = 0.279 M
⊙) is derived from our two methods.
The galaxy luminosity function in the LAMOST Complete Spectroscopic Survey of Pointing Area at the Southern Galactic Cap
Authors: Zhao Pin-Song , Wu Hong , Kevin Xu Cong , Yang Ming , Yang Fan , Zhu Yi-Nan , I Lam Man , Jin Jun-Jie , Yuan Hai-Long , Zhang Hao-Tong , Shen Shi-Yin , Shi Jian-Rong , Luo A-Li , Wu Xue-Bing , Zhao Yong-Heng , Jing Yi-Peng 
Published: August 2019

Abstract
We present optical luminosity functions (LFs) of galaxies in the 0.1
g, 0.1
r, 0.1
i bands, calculated using data in

∼
40

deg

2

sky area of the LAMOST Complete Spectroscopic Survey of Pointing Area (LaCoSSPAr) in the Southern Galactic Cap. Redshifts for galaxies brighter than r = 18.1 were obtained mainly with LAMOST. In each band, LFs derived using both parametric and non-parametric maximum likelihood methods agree well with each other. In the 0.1
r band, our fitting parameters of the Schechter function are

ϕ

*

=
(
1.65
±
0.36
)
×

10

−
2

h

3

Mpc

−
3

,

M

*

=
−
20.69
±
0.06

mag

and

α
=
−
1.12
±
0.08

, which agree with previous studies. Separate LFs are also derived for emission line galaxies and absorption line galaxies. The LFs of absorption line galaxies show a dip at 0.1
r**

∼

18.5 and can be fitted well by a double-Gaussian function, suggesting a bimodality in passive galaxies.
Observational signature of a wind bubble environment for double neutron star mergers
Authors: Li Yong-Sen , Chen Aming , Yu Yun-Wei 
Published: August 2019

Abstract
During the in-spiral stage of a compact binary, a wind bubble could be blown into the interstellar medium, if electromagnetic radiation due to the binary orbital motion is strong enough. Therefore, short-duration gamma-ray bursts (SGRBs) due to double neutron star mergers would in principle happen in a wind bubble environment, which can influence the propagation of the SGRB jet and consequent afterglow emission. By calculating the dynamics and synchrotron radiation of the jet-driven external shock, we reveal that an abrupt jump could appear in the afterglow light curves of SGRBs and the observational time of the jump is dependent on the viewing angle. This light curve jump provides an observational signature to constrain the radius of the wind bubble and thus the power of the electromagnetic radiation of the binary, by combining with gravitational wave detection.
A fiber bundle structure with uniform transmission characteristics for high-density astronomical optical cables
Authors: Yan Qi , Geng Tao , Jiang Hang , Zhao Chuang , Zhang Ying-Hua , Wang An-Zhi , Wang Jia-Bin , Jin Xi-Ren , Chen Xu-Dong , Lu Chun-Lian , Wang Liang , Huang Zhi-Xin , Zhuang Jing-Dong , Wang Song , Sun Wei-Min , Cui Xiang-Qun 
Published: August 2019

Abstract
Transmission efficiency (TE) and focal ratio degradation (FRD) are two important parameters for evaluating the quality of an optical fiber system used for astronomy. Compared to TE, the focal ratio is more easily influenced by external factors, such as bending or stress. Optical cables are widely implemented for multi-object telescopes and integral field units (IFUs). The design and fabrication process of traditional optical cables seldom considers the requirements of astronomical applications. In this paper, we describe a fiber bundle structure as the basic unit for miniaturized high-density FASOT-IFU optical cables, instead of the micro-tube structure in stranded cables. Seven fibers with hexagonal arrangement were accurately positioned by ultraviolet (UV)-curing acrylate to form the bundle. The coating diameter of a fiber is 0.125 mm, and the outer diameter of the bundle is 0.58 mm. Compared with the 0.8 mm micro-tube structure of a traditional stranded cable, the outer diameter of the fiber bundle was reduced by 27.5%. Fiber paste was filled into the bundle to reduce stress between the fibers. We tested the output focal ratio (OFR) in 95% of the encircled energy (EE95) of the fibers in the bundle under different conditions. With the incident focal ratio F/8, the maximum difference of OFR is 0.6. In particular, when the incident focal ratio is F/5, the maximum difference of OFR is only 0.1. The jacket formed by the UV-curing acrylate can withstand a certain stress of less than 1.38 N mm−1. The fiber bundle can maintain uniform emitting characteristics with a bending radius of 7.5 cm and with tension less than 6 N. The test results show that the structure of the fiber bundle can be used as a basic unit for miniaturized high-density astronomical optical cables.
Predication of Kerf Width and Surface Roughness in Waterjet Cutting using Neural Networks
Authors: Ramaswamy Pillai Swaroop , Reddy Madara Sahith , Pon Selvan Chithirai 
Published: August 2019

Abstract
Abrasive waterjet cutting is one of the unconventional methods used to cut some of the difficult to cut materials. In certain materials this method has proved to give better results compared to the conventional methods. In this model the water jet cutting is done on hastelloy using the three parameters which are abrasive mass flow rate, traverse speed, and the stand-off distance. The mathematical modelling to predict the kerf width based on these three input parameters is discussed in this paper. As the relation between the input and the output parameter is non-linear in nature neural network back propagation algorithm is used for the prediction. Here the experiment is conducted using waterjet cutting machine and the data’s like surface roughness, metal removal rate, kerf width and the kerf angle data are collected. Both the input and the output parameters are fed to the neural network toolbox programmed in the MATLAB. After 1000 iterations it has been found that the prediction is closer to the actual value. The mathematical constants which is the weight matrix is used to test the new set of data for accuracy. It has been found that the prediction is more accurate compared to the conventional methods. This experiment is based Taguch’s design which uses the above three parameters to cut the material. This paper also discusses on the predication of surface roughness of hastelloy created due to the variation in these parameters.