Facultad de Ciencias Físicas y Matemáticas: Recent submissions

Now showing items 4221-4240 of 22095

    • Trace elements in Antarctic penguins and the potential role of guano as source of recycled metals in the ... 
      Sparaventi, Erica; Rodríguez Romero, Araceli; Barbosa, Andrés; Ramajo Gallardo, Laura; Tovar Sánchez, Antonio (Elsevier, 2021)
      Penguins dominate the Antarctic avifauna. As key animals in the Antarctic ecosystem, they are monitored to evaluate the ecological status of this pristine and remote region and specifically, they have been used as ...
    • Low case numbers enable long-term stable pandemic control without lockdowns 
      Contreras, Sebastián; Dehning, Jonas; Mohr, Sebastián B.; Bauer, Simón; Spitzner, Paul F.; Priesemann, Viola (Amer Assoc Advancement Science, 2021)
      The traditional long-term solutions for epidemic control involve eradication or population immunity. Here, we analytically derive the existence of a third viable solution: a stable equilibrium at low case numbers, where ...
    • New tour on the subdifferential of supremum via finite sums and suprema 
      Hantoute, Abderrahim; López Cerda, Mauricio Alfredo (Springer, 2021)
      This paper provides new characterizations for the subdifferential of the pointwise supremum of an arbitrary family of convex functions. The main feature of our approach is that the normal cone to the effective domain of ...
    • On the nature of AGN and star formation enhancement in the z=3.1 SSA22 protocluster: the HST WFC3 IR view 
      Monson, Erik B.; Lehmer, Bret D.; Doore, Keith; Eufrasio, Rafael T.; Bonine, Brett; Alexander, David M.; Harrison, Chris M.; Kubo, Mariko; Mantha, Kameswara B.; Sáez, Cristian; Straughn, Amber; Umehata, Hideki (IOP, 2021)
      We examine possible environmental sources of the enhanced star formation and active galactic nucleus (AGN) activity in the z = 3.09 SSA22 protocluster using Hubble WFC3 F160W (similar to 1.6 mu m) observations of the SSA22 ...
    • H II regions and high-mass starless clump candidates: II. Fragmentation and induced star formation at similar ... 
      Zhang, S.; Zavagno, A.; López Sepulcre, A.; Liu, H.; Louvet, Fabien; Figueira, M.; Russeil, D.; Wu, Y.; Yuan, J.; Pillai, T. G. S (EDP Sciences, 2021)
      Context. The ionization feedback from H II regions modifies the properties of high-mass starless clumps (HMSCs, of several hundred to a few thousand solar masses with a typical size of 0.1–1 pc), such as dust temperature ...
    • Distance of Hi-GAL sources 
      Mège, P.; Russeil, D.; Zavagno, A.; Elia, D.; Molinari, S.; Brunt, C. M.; Butora, R.; Cambresy, L.; Di Giorgio, A. M.; Fenouillet, T.; Fukui, Y.; Lambert, J. C.; Makai, Z.; Merello, Manuel; Meunier, J.C.; Molinaro, M.; Moreau, C.; Pezzuto, S.; Poulin, Y.; Schisano, E.; Schuller, F. (EDP Sciences S A, 2021)
      Aims. Distances are key to determining the physical properties of sources. In the Galaxy, large (>10 000) homogeneous samples of sources for which distance are available, covering the whole Galactic distance range, are ...
    • Definition and classification of power system stability – revisited & extended 
      Hatziargyriou, Nikos; Milanovic, Jovica; Rahmann Zúñiga, Claudia Andrea; Ajjarapu, Venkataramana; Canizares, Claudio; Erlich, Istvan; Hill, David; Hiskens, Ian; Kamwa, Innocent; Pal, Bikash; Pourbeik, Pouyan; Sánchez Gasca, Juan; Stankovic, Aleksandar; Van Cutsem, Thierry; Vittal, Vijay; Vournas, Costas (IEEE-Inst ElectricaL Electronics Engineers, 2021)
      Since the publication of the original paper on power system stability definitions in 2004, the dynamic behavior of power systems has gradually changed due to the increasing penetration of converter interfaced generation ...
    • A SOPHIE RV search for giant planets around young nearby stars (YNS) A combination with the HARPS YNS survey 
      Grandjean, A.; Lagrange, A.M.; Meunier, N.; Rubini, P.; Desidera, S.; Galland, F.; Borgnie, S.; Zicher, N.; Messina, S.; Chauvin, Gael; Sterzik, M.; Pantoja, B. (EDP Sciences, 2021)
      Context. The search of close (a less than or similar to 5 au) giant planet (GP) companions with radial velocity (RV) around young stars and the estimate of their occurrence rates is important to constrain the migration ...
    • A bright inner disk and structures in the transition disk around the very low-mass star CIDA1 
      Pinilla, P.; Kurtovic, N. T.; Benisty, Myriam; Manara, C. F.; Natta, A.; Sanchis, E.; Tazzari, M.; Stammler, S. M.; Ricci, L.; Testi, L. (EDP Sciences, 2021)
      The frequency of Earth-sized planets in habitable zones appears to be higher around M-dwarfs, making these systems exciting laboratories to investigate planet formation. Observations of protoplanetary disks around very ...
    • A highly non-keplerian protoplanetary disc spiral structure in the gas disc of CQ tau 
      Wölfer, L.; Facchini, S.; Kurtovic, N. T.; Teague, R.; Van Dishoeck, E. F.; Benisty, Myriam; Ercolano, B.; Lodato, G.; Miotello, A.; Rosotti, G.; Testi, L.; Ubeira Gabellini, M. G. (EDP Sciences, 2021)
      Context. In recent years high-angular-resolution observations have revealed that circumstellar discs appear in a variety of shapes with diverse substructures being ubiquitous. This has given rise to the question of whether ...
    • Nexus Thinking at River Basin Scale: Food, Water and Welfare 
      Ponce Oliva, Roberto D.; Fernández, Francisco J.; Vásquez Lavin, Felipe; Arias Montevechio, Esteban; Julio, Natalia; Stehr Gesche, Alejandra Patricia (MDPI, 2021)
      Water resources face an unparalleled confluence of pressures, with agriculture and urban growth as the most relevant human-related stressors. In this context, methodologies using a Nexus framework seem to be suitable to ...
    • Long-term stellar activity variations and their effect on radial-velocity measurements 
      Costes, Jean C.; Watson, Christopher; de Mooij, Ernst; Saar, Steven H.; Dumusque, Xavier; Cameron, Collier; Phillips, David F.; Günther, Maximilian N.; Jenkins, James Stewart; Mortier, Annelies; Thompson, Andrew P. G. (Oxford Univ Press, England, 2021)
      Long-term stellar activity variations can affect the detectability of long-period and Earth-analogue extrasolar planets. We have, for 54 stars, analysed the long-term trend of five activity indicators: logR HK, the ...
    • Liquiñe‑Ofqui’s fast slipping intra‑volcanic arc crustal faulting above the subducted Chile Ridge 
      De Pascale, Gregory P.; Froude, Melanie; Penna, Ivanna; Hermanns, Reginald L; Sepúlveda, Sergio A.; Moncada, Daniel; Pérsico, Mario; Easton Vargas, Gabriel; Villalobos, Angelo; Gutiérrez, Francisco (Nature Research, 2021)
      The southernmost portion of the Liquiñe-Ofqui fault zone (LOFZ) lies within the proposed slab window which formed due to oblique subduction of the Chile Ridge in Patagonia. Mapping of paleo-surface ruptures, offsets, and ...
    • Freeze–thaw cycles and snow impact at arid permafrost region in Chajnantor volcano, Atacama, northern Chile 
      Mena, Gabriela; Yoshikawa, Kenji; Schorghofer, Norbert; Pastén, Cesar; Ochoa, Felipe Agustín; Yoshii, Yuzuru; Doi, Mamoru; Miyata, Takeshi; Takahashi, Hidenori; Casassa Rogazinski, Gino; Sone, Toshio (Taylor & Francis, 2021)
      Permafrost occurs in the high Atacama Desert, and its thermal state was characterized at a study site 5,075 m a.s.l., at the lower regional altitude boundary for permafrost. The permafrost body is about 5 m thick and ...
    • Enhancing the international study of positive youth development: Process, specificity, and the sample case ... 
      Lerner, Richard M.; Jervis Ortiz, Pamela; Bornstein, Marc H. (Univ Pittsburgh, USA, 2021)
      This article focuses on the interplay of research and practice (researchpractice integration) in advancing international efforts to understand and enhance positive youth development (PYD). We discuss 3 facets of PYD ...
    • Debris flows occurrence in the semiarid central Andes under climate change scenario 
      Moreiras, Stella Maris; Sepúlveda Valenzuela, Sergio Andrés; Correas González, Mariana; Lauro, Carolina; Vergara, Iván; Jeanneret, Pilar; Junquera Torrado, Sebastián; Cuevas, Jaime G.; Maldonado, Antonio; Antinao Rojas, Jose Luis; Lara Castillo, Marisol del Pilar (MDPI, 2021)
      This review paper compiles research related to debris flows and hyperconcentrated flows in the central Andes (30 –33 S), updating the knowledge of these phenomena in this semiarid region. Continuous records of these ...
    • Broadening the scope of high structural dimensionality nanomaterials using pyridine-based curcuminoids 
      Rodríguez Cid, Laura; Qian, Wenjie; Iribarra Araya, Joseline Valentina; Etcheverry Berríos, Álvaro; Martínez Olmos, Eulalia; Choquesillo Lazarte, Duane; Sañudo, Eva Carolina; Roubeau, Olivier; López Periago, Ana María; González Campo, Arántzazu; Planas, José G.; Soler Jauma, Monica; Domingo Maroto, Concepcion; Aliaga Alcalde, Núria (Royal Soc Chemistry, 2021)
      We present a new heteroditopic ligand (3pyCCMoid) that contains the typical skeleton of a curcuminoid (CCMoid) decorated with two 3-pyridyl groups. The coordination of 3pyCCMoid with ZnII centres results in a set of novel ...
    • Auriferous pyrite formed by episodic fluid inputs in the Akeshi and Kasuga high-sulfidation deposits, ... 
      Ishida, Mizuki; Romero, Rurik; Leisen, Mathieu; Yasukawa, Kazutaka; Nakamura, Kentaro; Barra Pantoja, Luis Fernando; Reich Morales, Martín Herbert; Kato, Yasuhiro (Springer, 2021)
      Pyrite geochemistry has proven useful for tracking changes in the composition and physico-chemical conditions of hydrothermal fluids in ore-forming environments. Here, we investigated the microtextural features and chemical ...
    • TOI-431/HIP 26013: a super-Earth and a sub-Neptune transiting a bright, early K dwarf, with a third RV planet 
      Osborn, Ares; Armstrong, David J.; Cale, Bryson; Brahm, Rafael; Wittenmyer, Robert A.; Dai, Fei; Crossfield, Ian J. M.; Bryant, Edward M.; Adibekyan, Vardan; Cloutier, Ryan; Collins, Karen A.; Mena, E. Delgado; Fridlund, Malcolm; Hellier, Coel; Howell, Steve B.; Matthews, Elisabeth C.; Ziegler, Carl; Ricker, George; Vanderspek, Roland; Latham, David W.; Seager, S.; Winn, Joshua N.; Jenkins, Jon M.; Acton, Jack S.; Addison, Brett C.; Anderson, David R.; Ballard, Sarah; Barrado, David; Barros, Susana C. C.; Batalha, Natalie; Bayliss, Daniel; Barclay, Thomas; Benneke, Bjorn; Berberian, John; Bouchy, Francois; Bowler, Brendan P.; Briceno, Cesar; Burke, Christopher J.; Burleigh, Matthew R.; Casewell, Sarah L.; Ciardi, David; Collins, Kevin; Cooke, Benjamin F.; Demangeon, Olivier D. S.; Díaz, Rodrigo F.; Dorn, C.; Dragomir, Diana; Dressing, Courtney; Dumusque, Xavier; Espinoza, Néstor; Figueira, P.; Fulton, Benjamin; Furlan, E.; Gaidos, E.; Geneser, C.; Gill, Samuel; Goad, Michael R.; Gonzáles, Erica J.; Gorjian, Varoujan; Gunther, Maximilian N.; Helled, Ravit; Henderson, Beth A.; Henning, Thomas; Hogan, Aleisha; Hojjatpanah, Saeed; Horner, Jonathan; Howard, Andrew W.; Hoyer, Sergio; Huber, Dan; Isaacson, Howard; Jenkins, James S.; Jensen, Eric L. N.; Jordan, Andres; Kane, Stephen R.; Kidwell, Richard; Kielkopf, John; Law, Nicholas; Lendl, Monika; Lund, M.; Nielsen, Louise D.; Okumura, Jack; Osborn, Hugh P.; Petigura, Erik A.; Plavchan, Peter; Pollacco, Don; Quintana, Elisa; Raynard, Liam; Robertson, Paul; Rose, Mark E.; Roy, Arpita; Reefe, Michael; Santerne, Alexandre; Santos, Nuno C.; Sarkis, Paula; Schlieder, J.; Schwarz, Richard P.; Scott, Nicholas J.; Shporer, Avi; Smith, A. M. S.; Stibbard, C.; Stockdale, Chris; Strom, Paul A.; Twicken, Joseph D.; Tan, Thiam-Guan; Tanner, A.; Teske, J.; Tilbrook, Rosanna H.; Tinney, C. G; Udry, Stephane; Villasenor, Jesus Noel; Vines, Jose; Wang, Sharon X.; Weiss, Lauren M.; West, Richard G.; Wheatley, Peter J.; Wright, Duncan J.; Zhang, Hui; Zohrabi, F. (Oxford, 2021)
      We present the bright (V-mag = 9.12), multiplanet system TOI-431, characterized with photometry and radial velocities (RVs). We estimate the stellar rotation period to be 30.5 +/- 0.7 d using archival photometry and RVs. ...
    • The cosmic ultraviolet baryon survey (CUBS) - III. Physical properties and elemental abundances of Lyman-limit ... 
      Zahedy, Fakhri S.; Chen, Hsiao-Wen; Cooper, Thomas M.; Boettcher, Erin; Johnson, Sean D.; Rudie, Gwen C.; Chen, Mandy C.; Cantalupo, Sebastiano; Cooksey, Kathy L.; Faucher Giguere, Claude-Andre; Greene, Jenny E.; López Morales, Sebastián Víctor Claudio; Mulchaey, John S.; Penton, Steven; Petitjean, Patrick; Putman, Mary E.; Rafelski, Marc; Rauch, Michael; Schaye, Joop; Simcoe, Robert A.; Walth, Gregory L. (Oxford, 2021)
      We present a systematic investigation of physical conditions and elemental abundances in four optically thick Lyman-limit systems (LLSs) at z = 0.36-0.6 discovered within the cosmic ultraviolet baryon survey (CUBS). Because ...