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  • High-resolution abundance analysis of four red giants in the globular cluster NGC 6558 

    Barbuy, B.; Muniz, L.; Ortolani, S.; Ernandes, H.; Dias, B.; Saviane, I.; Kerber, L.; Bica, E.; Pérez-Villegas, A.; Rossi, L.; Held, E.V. (EDP Sciences, 2018-11)
    Context. NGC 6558 is a bulge globular cluster with a blue horizontal branch (BHB), combined with a metallicity of [Fe/H] â‰-1.0. It is similar to HP 1 and NGC 6522, which could be among the oldest objects in the Galaxy. ...
  • In-situ preparation of CdTe quantum dots capped with a β-cyclodextrin-epichlorohydrin polymer: Polymer influence on the nanocrystal’s optical properties 

    Martin-Trasanco, R.; Esparza-Ponce, H.E.; Ortiz, P.D.; Oyarzun, D.P.; Zuñiga, C.; Montero-Cabrera, M.E.; Tundidor-Camba, A.; Pizarro, G.C.; Arratia-Pérez, R. (MDPI AG, 2018-11)
    β-Cyclodextrin (βCD), the less water soluble of the cyclodextrins, has been used as a capping agent in the preparation of semiconductor nanocrystals or quantum dots (QDs). Nevertheless, no reports have been found in the ...
  • Noether–Wald energy in Critical Gravity 

    Anastasiou, G.; Olea, R.; Rivera-Betancour, D. (Elsevier B.V., 2019-01)
    Criticality represents a specific point in the parameter space of a higher-derivative gravity theory, where the linearized field equations become degenerate. In 4D Critical Gravity, the Lagrangian contains a Weyl-squared ...
  • When nature tries to trick us: An eclipsing eccentric close binary superposed on the central star of the planetary nebula M 3-2 

    Boffin, H.M.J.; Jones, D.; Wesson, R.; Beletsky, Y.; Miszalski, B.; Saviane, I.; Monaco, L.; Corradi, R.; Santander García, M.; Rodríguez-Gil, P. (EDP Sciences, 2018-11)
    Bipolar planetary nebulae (PNe) are thought to result from binary star interactions and, indeed, tens of binary central stars of PNe have been found, in particular using photometric time-series that allow for the detection ...
  • Structure and kinematics of Type II Cepheids in the Galactic bulge based on near-infrared VVV data 

    Braga, V.F.; Bhardwaj, A.; Contreras Ramos, R.; Minniti, D.; Bono, G.; De Grijs, R.; Minniti, J.H.; Rejkuba, M. (EDP Sciences, 2018-11)
    Context. Type II Cepheids (T2Cs) are radially pulsating variables that trace old stellar populations and provide distance estimates through their period-luminosity (PL) relation. Aims. We trace the structure of old stellar ...
  • The High Cadence Transit Survey (HiTS): Compilation and Characterization of Light-curve Catalogs 

    Martínez-Palomera, J.; Förster, F.; Protopapas, P.; Maureira, J.C.; Lira, P.; Cabrera-Vives, G.; Huijse, P.; Galbany, L.; Jaeger, T.D.; González-Gaitán, S.; Medina, G.; Pignata, G.; Martín, J.S.; Hamuy, M.; Muñoz, R.R. (Institute of Physics Publishing, 2018-11)
    The High Cadence Transient Survey (HiTS) aims to discover and study transient objects with characteristic timescales between hours and days, such as pulsating, eclipsing, and exploding stars. This survey represents a unique ...
  • Unraveling the Infrared Transient VVV-WIT-06: The Case for the Origin as a Classical Nova 

    Banerjee, D.P.K.; Hsiao, E.Y.; Diamond, T.; Galbany, L.; Morrell, N.; Minniti, D.; Kuncarayakti, H.; Mattila, S.; Harmanen, J. (Institute of Physics Publishing, 2018-11)
    The enigmatic near-infrared transient VVV-WIT-06 underwent a large-amplitude eruption of unclear origin in 2013 July. Based on its light curve properties and late-time post-outburst spectra, various possibilities have been ...
  • Milky Way metallicity gradient from Gaia DR2 F/1O double-mode Cepheids 

    Lemasle, B.; Hajdu, G.; Kovtyukh, V.; Inno, L.; Grebel, E.K.; Catelan, M.; Bono, G.; François, P.; Kniazev, A.; Da Silva, R.; Storm, J. (EDP Sciences, 2018-10)
    Context. The ratio of the first overtone (1O)/fundamental (F) periods of mixed-mode Cepheids that pulsate simultaneously in these two modes (F/1O) is metallicity-dependent. It can therefore be used to characterize the ...
  • Lithium abundance in lower red giant branch stars of Omega Centauri 

    Mucciarelli, A.; Salaris, M.; Monaco, L.; Bonifacio, P.; Fu, X.; Villanova, S. (EDP Sciences, 2018-10)
    We present Li, Na, Al, and Fe abundances of 199 lower red giant branch star members of the stellar system Omega Centauri, using high-resolution spectra acquired with FLAMES at the Very Large Telescope. The A(Li) distribution ...
  • Milky Way demographics with the VVV survey: IV. PSF photometry from almost one billion stars in the Galactic bulge and adjacent southern disk 

    Alonso-García, J.; Saito, R.K.; Hempel, M.; Minniti, D.; Pullen, J.; Catelan, M.; Ramos, R.C.; Cross, N.J.G.; Gonzalez, O.A.; Lucas, P.W.; Palma, T.; Valenti, E.; Zoccali, M. (EDP Sciences, 2018-11)
    Context. The inner regions of the Galaxy are severely affected by extinction, which limits our capability to study the stellar populations present there. The Vista Variables in the Vía Láctea (VVV) ESO Public Survey has ...
  • NGC 6791: A Probable Bulge Cluster without Multiple Populations 

    Villanova, S.; Carraro, G.; Geisler, D.; Monaco, L.; Assmann, P. (Institute of Physics Publishing, 2018-11)
    NGC 6791 is a unique stellar cluster, key to our understanding of both the multiple stellar population phenomenon and the evolution and assembly of the Galaxy. However, despite many investigations, its nature is still very ...
  • Classification of non-Riemannian doubled-yet-gauged spacetime 

    Morand, K.; Park, J.-H. (Springer New York LLC, 2017-10)
    Assuming O(D, D) covariant fields as the ‘fundamental’ variables, double field theory can accommodate novel geometries where a Riemannian metric cannot be defined, even locally. Here we present a complete classification ...
  • Ruthenium(II)–carbonyl complexes containing two N-monodentate 1,8-naphthyridine ligands: active catalysis in transfer hydrogenation reactions 

    Guajardo, J.; Ibañez, A.; Guerchais, V.; Vega, A.; Moya, S.; Aguirre, P. (Wiley-Blackwell, 2018-11)
    The reaction of 2-aminonicotinaldehyde with 2- or 4-methoxyacetophenone in basic media leads to the new ligands 2-(4-methoxyphenyl)-1,8-naphthyridine and 2-(2-methoxyphenyl)-1,8-naphthyridine, respectively, in high yield. ...
  • Accuracy of the Heyd-Scuseria-Ernzerhof hybrid functional to describe many-electron interactions and charge localization in semiconductors 

    Flores, M.A.; Orellana, W.; Menéndez-Proupin, E. (American Physical Society, 2018-10)
    Hybrid functionals, which mix a fraction of Hartree-Fock exchange with local or semilocal exchange, have become increasingly popular in quantum chemistry and computational materials science. Here, we assess the accuracy ...
  • The optical/NIR afterglow of GRB 111209A: Complex yet not unprecedented 

    Kann, D.A.; Schady, P.; Olivares, E.F.; Klose, S.; Rossi, A.; Perley, D.A.; Zhang, B.; Krühler, T.; Greiner, J.; Nicuesa Guelbenzu, A.; Elliott, J.; Knust, F.; Cano, Z.; Filgas, R.; Pian, E.; Mazzali, P.; Fynbo, J.P.U.; Leloudas, G.; Afonso, P.M.J.; Delvaux, C.; Graham, J.F.; Rau, A.; Schmidl, S.; Schulze, S.; Tanga, M.; Updike, A.C.; Varela, K. (EDP Sciences, 2018-09)
    Context. Afterglows of gamma-ray bursts (GRBs) are simple in the most basic model, but can show many complex features. The ultra-long duration GRB 111209A, one of the longest GRBs ever detected, also has the best-monitored ...
  • Vertex operators for the plane wave pure spinor string 

    Chandia, O.; Vallilo, B.C. (Springer Verlag, 2018-10)
    In this work we give an explicit construction for the vertex operators of massless states in the pure spinor superstring in a plane wave background. The construction is based on the observation that the full action can be ...
  • The STRong lensing Insights into the Dark Energy Survey (STRIDES) 2016 follow-up campaign - I. Overview and classification of candidates selected by two techniques 

    Treu, T.; Agnello, A.; Baumer, M.A.; Birrer, S.; Buckley-Geer, E.J.; Courbin, F.; Kim, Y.J.; Lin, H.; Marshall, P.J.; Nord, B.; Schechter, P.L.; Sivakumar, P.R.; Abramson, L.E.; Anguita, T.; Apostolovski, Y.; Auger, M.W.; Chan, J.; Chen, G.; Collett, T.E.; Fassnacht, C.D.; Hsueh, J.-W.; Lemon, C.; McMahon, R.G.; Motta, V.; Ostrovski, F.; Rojas, K.; Rusu, C.E.; Williams, P.; Frieman, J.; Meylan, G.; Suyu, S.H.; Abbott, T.M.C.; Abdalla, F.B.; Allam, S.; Annis, J.; Avila, S.; Banerji, M.; Brooks, D.; Rosell, A.C.; Carrasco Kind, M.; Carretero, J.; Castander, F.J.; D'Andrea, C.B.; da Costa, L.N.; De Vicente, J.; Doel, P.; Eifler, T.F.; Flaugher, B.; Fosalba, P.; García-Bellido, J.; Goldstein, D.A.; Gruen, D.; Gruendl, R.A.; Gutierrez, G.; Hartley, W.G.; Hollowood, D.; Honscheid, K.; James, D.J.; Kuehn, K.; Kuropatkin, N.; Lima, M.; Maia, M.A.G.; Martini, P.; Menanteau, F.; Miquel, R.; Plazas, A.A.; Romer, A.K.; Sanchez, E.; Scarpine, V.; Schindler, R.; Schubnell, M.; Sevilla-Noarbe, I.; Smith, M.; Smith, R.C.; Soares-Santos, M.; Sobreira, F.; Suchyta, E.; Swanson, M.E.C.; Tarle, G.; Thomas, D.; Tucker, D.L.; Walker, A.R. (Oxford University Press, 2018-11)
    The primary goals of the STRong lensing Insights into the Dark Energy Survey (STRIDES) collaboration are to measure the dark energy equation of state parameter and the free streaming length of dark matter. To this aim, ...
  • Energetics and Electronic Properties of Interstitial Chlorine in CdTe 

    Orellana, W.; Menéndez-Proupin, E.; Flores, M.A. (Wiley-VCH Verlag, 2019-03)
    The role of interstitial chlorine in the electronic properties of CdTe is addressed by density functional theory calculations including hybrid functionals and large unit cells. The stability and diffusion energy barriers ...
  • New Galactic star clusters discovered in the disc area of the VVVX survey 

    Borissova, J.; Ivanov, V.D.; Lucas, P.W.; Kurtev, R.; Alonso-Garcia, J.; Ramírez Alegría, S.; Minniti, D.; Froebrich, D.; Hempel, M.; Medina, N.; Chené, A.-N.; Kuhn, M.A. (Oxford University Press, 2018-12)
    The 'VISTA Variables in the Vía Láctea eXtended (VVVX)' ESO Public Survey is a nearinfrared photometric sky survey that covers nearly 1700 deg2 towards the Galactic disc and bulge. It is well-suited to search for newopen ...
  • Magnetic analysis of two [cobalt-imidazole-carboxylate] complexes: Orbital contribution 

    Arrué, R.; Toledo, D.; Peña, O.; Pivan, J.-Y.; Reis, M.; Moreno, Y. (Sociedad Chilena de Quimica, 2018)
    Two coordination complexes, Co(HIMC)2(H2O)2 (1) and Co(H2IMDC)2(H2O)2 (2), were synthesized by mixing the complex precursor Cobalt(II) hexafluoroacetylacetonate (Co(hfacac)2) with 1H-imidazole-4-carboxylic acid (H2IMC) and ...

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