Searching for emission-line galaxies: The UCM survey

We are carrying out a long-term project with the main purposes of finding and analyzing low metallicity galaxies. A very small number of very low metallicity galaxies is known up to now. However these ojbects are particularly interesting since they are excellent candidates to 'young galaxies' in evolutionary sense as POX186 (Kunth, Maurogordato & Vigroux, 1988). Since the interstellar matter in these objects is only weakly contaminated by stellar evolution, their study could provide valuable information about the primordial helium abundance and therefore it could place constraints on the different Big-Bang models. The instrumental set up of our survey is an objective-prism used with the Schmidt telescope at Calar Alto Observatory. By using hypersensitized IIIaF emulsion and RG630 filter low resolution spectra in the H alpha region of objects in a wide field is obtained (Rego et al. 1989, Zamorano et al. 1990). Surveys carried out in the past two decades at optical blue wavelengths have also produced large samples of emission-line galaxies (ELGs), for example MacAlpine & Willians 1981 and reference therein, Wasilewski 1983, Salzer and MacAlpine 1988, or Smith et al. 1976. Relying primarily on objective-prism plates taken in the blue, these surveys have found over 3000 blue/emission-line galaxies so far. A significant number of star-forming galaxies are missed by optical surveys in the blue because of their low-excitation spectra (MacAlpine and Willians 1981, Markarian et al. 1981 and references therein) or their low metallicity (Kunth and Sargent, 1986)

Evolución tectónica y sedimentaria durante el Priaboniense superior-Mioceno inferior, en el frente de cabalgamiento de las Sierras Marginales occidentales

Four systems tracts have been distinguished in the uppermost Eocene-lower Miocene continental deposits of the northern margin of the Ebro basin. 1) The Satinar systems tract 5pper Pnabonian-Stampian) consists of an alluvial system (Salinar Fm) located in the north, that passes to playa-lake evapontes (lower Barbastro Fm) towards the foreland. The alluvial sediments are represented only by distal fan and alluvial plain facies which are in the footwall of the Sierras Marginales thrust. The top of the Salinar systems tract is inarked by lacustrine limestones that represerit the alluvial fan retre,at and a change to less saline conditions. 2) The Peralta systems tract (upperPriaboniiin?-Stampian) consists of srnall alluvial fans attached to the Sierras Marginales (Peralta Fm) that pass to playa-lake evaporites towards ;he foreland (upper Barbastro Fm). The alluvial facies are represented by calcareous conglomerates, that grade in a few kilometers to thin-bedded sandstones and mudstones. Evaporitic facies are represented by nodular and larninated gypsum. The top of the Peralta systems tract is also marked by an extensive body of lacustrine carbonates that represent a new alluvial fan retreat. 3) The Peraltilla systems tract (Stampian-Chattian) consists of small alluvial fans (Calasanz Fm), that show i;imilar characteristics to those of the Peralta I'rn but they interfinger distally with a large fluvial systern sourced in the axial Pyrenees (Peraltilla Fm). This fluvial fan consists of red overbank deposits with paleosoils, and channelized bodies, which are mostly conglomeratic in the Azanuy syncline and become sandy towards the southern limb of Barbastro anticline. This granulometric change is accompanied by a change in channel type, from typical braided to sinuouir or straight. The Salinar and Peralta systerns are contemporaneous with the emplacernent of the Sierras Marginales thrust sheet. The clastic sedirnents accumulated in a flexura1 trough that widens while the thrust propagates. As a consecuence, the saline lake facies expand towards the foreland. During the Peralta systerns tract a blind detachment located in the base of the Barbastro evaporitic formation propagated and started to fold the foreland. The Peraltilla systems tract is contemporaneous with the end of displacement of the Sierras Marginales thrust sheet and the rnain growth of the Peralta detachment anticline. However, these tectonic events were accompanied by a significant forelandward shift of the basin depocenter and a more homogeneous subsidence. 4) The Sarinena systems tract (Chattian-Aquitanian) is very similar to the Peraltilla one but it shows a marked southwards shift of the proximal facies. It consists of srnall fans of local provenance (Baells Fm) that interfinger distally with alarge fluvial fan (Sarinena Fm). The sedimentation of the Sariñenasystems tract is contemporaneous with the continued southward propagation of the detachment through the foreland evaporites, that creates new detachment folds (Barbastro and Altarriba anticlines, Azanuy syncline). An episode of out-of sequence thrusting generates small thrust-top basins on the Sierras Marginales, filled by the Baells conglomerates. The Sariñena systems tract accumulated in a wide foreland trough, with a strongly subsiding located in the Azanuy syncline

Generated emotions by various types of games in physical education

El objetivo del presente estudio ha sido ahondar en el conocimiento de las emociones generadas a través de la práctica de diversos tipos de juegos, mediante la puesta en práctica de una propuesta diseñada a tal efecto. Más concretamente se ha tratado de conocer en qué medida, los juegos cooperativos y de oposición permiten el desarrollo emocional del alumnado en comparación con los juegos populares cooperativos y de oposición. Los participantes han sido un total de 50 alumnos y alumnas de sexto curso de Educación Primaria. El instrumento empleado ha sido el cuestionario sobre las percepciones socioemocionales de Gil-Madrona y Martínez (2016). Los resultados indican una gran similitud entre la utilización de los juegos cooperativos y juegos populares cooperativos. No obstante, los juegos populares de oposición producen mayores emociones positivas en el alumnado respecto a los juegos de oposición. El porcentaje de alumnado que se decanta por las emociones plancenteras es manifiestamente superior al de aquellos que se decantan por las displacenteras. Finalmente, se concluye que la propuesta utilizada es eficaz para producir emociones en los cuatro dominios de acción motriz objeto de estudioThe aim of this research has been to know which are the generated emotions through the practice of diverse kinds of games, through a proposal. Specifically, it is have been tried to know how cooperative and opposition games allow for the emotional development of the students with respect to traditional cooperative games and traditional opposition games. A total of 50 children of 6th grade took part in this work. The instrument used was the Gil-Madrona and Martinez's questionnaire (2016) about socio-emotional perceptions. The results indicate a similarity between using cooperative and traditional cooperative games. However, traditional opposition games produce greater positive emotions in students with respect to opposition games. Finally, it is concluded that the approach used is effective to produce emotions in the four motor domains studie

Evolución tectónica y sedimentaria durante el Priaboniense superior-Mioceno inferior, en el frente de cabalgamiento de las Sierras Marginales occidentales

Four systems tracts have been distinguished in the uppermost Eocene-lower Miocene continental deposits of the northern margin of the Ebro basin. 1) The Satinar systems tract 5pper Pnabonian-Stampian) consists of an alluvial system (Salinar Fm) located in the north, that passes to playa-lake evapontes (lower Barbastro Fm) towards the foreland. The alluvial sediments are represented only by distal fan and alluvial plain facies which are in the footwall of the Sierras Marginales thrust. The top of the Salinar systems tract is inarked by lacustrine limestones that represerit the alluvial fan retre,at and a change to less saline conditions. 2) The Peralta systems tract (upperPriaboniiin?-Stampian) consists of srnall alluvial fans attached to the Sierras Marginales (Peralta Fm) that pass to playa-lake evaporites towards ;he foreland (upper Barbastro Fm). The alluvial facies are represented by calcareous conglomerates, that grade in a few kilometers to thin-bedded sandstones and mudstones. Evaporitic facies are represented by nodular and larninated gypsum. The top of the Peralta systems tract is also marked by an extensive body of lacustrine carbonates that represent a new alluvial fan retreat. 3) The Peraltilla systems tract (Stampian-Chattian) consists of small alluvial fans (Calasanz Fm), that show i;imilar characteristics to those of the Peralta I'rn but they interfinger distally with a large fluvial systern sourced in the axial Pyrenees (Peraltilla Fm). This fluvial fan consists of red overbank deposits with paleosoils, and channelized bodies, which are mostly conglomeratic in the Azanuy syncline and become sandy towards the southern limb of Barbastro anticline. This granulometric change is accompanied by a change in channel type, from typical braided to sinuouir or straight. The Salinar and Peralta systerns are contemporaneous with the emplacernent of the Sierras Marginales thrust sheet. The clastic sedirnents accumulated in a flexura1 trough that widens while the thrust propagates. As a consecuence, the saline lake facies expand towards the foreland. During the Peralta systerns tract a blind detachment located in the base of the Barbastro evaporitic formation propagated and started to fold the foreland. The Peraltilla systems tract is contemporaneous with the end of displacement of the Sierras Marginales thrust sheet and the rnain growth of the Peralta detachment anticline. However, these tectonic events were accompanied by a significant forelandward shift of the basin depocenter and a more homogeneous subsidence. 4) The Sarinena systems tract (Chattian-Aquitanian) is very similar to the Peraltilla one but it shows a marked southwards shift of the proximal facies. It consists of srnall fans of local provenance (Baells Fm) that interfinger distally with alarge fluvial fan (Sarinena Fm). The sedimentation of the Sariñenasystems tract is contemporaneous with the continued southward propagation of the detachment through the foreland evaporites, that creates new detachment folds (Barbastro and Altarriba anticlines, Azanuy syncline). An episode of out-of sequence thrusting generates small thrust-top basins on the Sierras Marginales, filled by the Baells conglomerates. The Sariñena systems tract accumulated in a wide foreland trough, with a strongly subsiding located in the Azanuy syncline

A minor-merger origin for inner disks and rings in early-type galaxies

Nuclear disks and rings are frequent galaxy substructures, for a wide range of morphological types (from S0 to Sc). We have investigated the possible minor-merger origin of inner disks and rings in spiral galaxies through collisionless N-body simulations. The models confirm that minor mergers can drive the formation of thin, kinematically-cold structures in the center of galaxies out of satellite material, without requiring the previous formation of a bar. Satellite core particles tend to be deposited in circular orbits in the central potential, due to the strong circularization experienced by the satellite orbit through dynamical friction. The material of the satellite core reaches the remnant center if satellites are dense or massive, building up a thin inner disk; whereas it is fully disrupted before reaching the center in the case of low-mass satellites, creating an inner ring instead.Comment: 2 pages, 2 figures, Proceedings of the conference "Hunting for the Dark: The Hidden Side of Galaxy Formation", held in Malta, 19-23 Oct. 2009, ed. V. Debattista and C. C. Popescu, AIP Conf. Ser., in pres