Artículos de revistas
Permanent URI for this collection
Esta colección incluye artículos de revistas de profesores de la Pontificia Universidad Católica de Chile, publicados en revistas nacionales y extranjeras.
Browse
Browsing Artículos de revistas by browse.metadata.categoria "Astronomía"
Now showing 1 - 20 of 1752
Results Per Page
Sort Options
- Item12CO(J=3→2) detections in bulges of low surface brightness galaxies with APEX(2008) Galaz, Gaspar; Galaz, Gaspar
- Item(2+1)-Dimensional Charged Black Hole in Topologically Massive Electrodynamics(2005) Andrade, T.; Bañados, Máximo; Benguria Donoso, Rafael
- Item2004 EW95: A Phyllosilicate-bearing Carbonaceous Asteroid in the Kuiper Belt(2018) Seccull, Tom; Fraser, Wesley C.; Puzia, Thomas H.; Brown, Michael E.; Schoenebeck, Frederik
- Item3D kinematics through the X-shaped Milky Way bulge(2013) Vásquez Godoy, Sergio Osmán.; Zoccali, Manuela; Baffico Haramoto, Rodolfo Maurizio; Minniti, D.
- Item3D simulations of clump formation in stellar wind collisions(2019) Calderón Espinoza, Diego Nicolás; Cuadra, Jorge; Schartmann, Marc; Burkert, Andreas; Prieto Brito, Joaquín; Russell, Christopher M. P.The inner parsec of our Galaxy contains tens of Wolf-Rayet stars whose powerful outflows are constantly interacting while filling the region with hot, diffuse plasma. Theoretical models have shown that, in some cases, the collision of stellar winds can generate cold, dense material in the form of clumps. However, their formation process and properties are not well understood yet. In this work we present, for the first time, a statistical study of the clump formation process in unstable wind collisions. We study systems with dense outflows (∼10−5 M yr−1 ), wind speeds of 500–1500 km s−1, and stellar separations of ∼20–200 au. We develop 3D high resolution hydrodynamical simulations of stellar wind collisions with the adaptive-mesh refinement grid-based code RAMSES. We aim to characterise the initial properties of clumps that form through hydrodynamic instabilities, mostly via the non-linear thin shell instability (NTSI). Our results confirm that more massive clumps are formed in systems whose winds are close to the transition between the radiative and adiabatic regimes. Increasing either the wind speed or the degree of asymmetry increases the dispersion of the clump mass and ejection speed distributions. Nevertheless, the most massive clumps are very light (∼10−3–10−2 M⊕), about three orders of magnitude less massive than theoretical upper limits. Applying these results to the Galactic Centre we find that clumps formed through the NTSI should not be heavy enough either to affect the thermodynamic state of the region or to survive for long enough to fall onto the central super-massive black hole.
- Item5@5 – a 5 GeV energy threshold array of imaging atmospheric Cherenkov telescopes at 5 km altitude(2001) Aharonian, F.A.; Quintana Godoy, Hernán
- Item90 Winds, Some X-rays, and Sgr A* Walk Into VR...(2021) Russell, C. T.; Luco Korn, José Baltasar; Sepúlveda, Miguel; Cuadra, Jorge; Calderón Espinoza, Diego Nicolás; Wang, Q. DanielVirtual reality (VR) provides a new tool for exploring astrophysical simulations. Our case study is hydrodynamic simulations of the central parsec of the Galactic center, which models 25 Wolf-Rayet (WR) stars that are orbiting Sgr A* while ejecting their stellar winds. The VR program we are developing allows users to fully immerse themselves in a simulation snapshot, allowing them full control over their position and viewing orientation. The highlight result so far is exquisite views of material inspiraling towards the black hole. We also present a new hydrodynamic simulation that adds 65 O and 'S' stars, which causes a reduction in thermal X-ray emission in the vicinity of Sgr A* compared to the WR-only simulations....
- ItemA 'high-hard' outburst of the black hole X-ray binary GS 1354-64(2016) Koljonen, KII; Russell, D. M.; Corral Santana, J. M.; Padilla, Armas M.; Muñoz Darias, T.; Lewis, F.; Coriat, M.; Bauer, Franz Erik
- ItemA 0.24+0.18 M-circle dot double-lined eclipsing binary from the HATSouth survey(2015) Zhou, G.; Bayliss, D.; Hartman, J.; Rabus, Markus; Bakos, G.; Jordán Colzani, Andrés Cristóbal; Brahm, R.; Penev, K.; Csubry, Z.; Mancini, L.; Espinoza, N.; De Val-Borro, M.; Bhatti, W.; Ciceri, S.; Henning, T.; Schmidt, B.; Murphy, S.; Butler, R.; Suc, V.
- ItemA 421-D Activity Cycle in the Bex Recurrent Transient A0538-66 From Macho Monitoring(2001) Alcock, C.; Minniti, D.
- ItemA bright, spatially extended lensed galaxy at z = 1.7 behind the cluster RCS2 032727-132623(2010) Wuyts, E.; Barrientos, Luis Felipe; Carrasco Venegas, Mauricio Efraín.
- ItemA candidate tidal disruption event in the Galaxy cluster Abell 3571(2009) Cappelluti, N.; Quintana Godoy, Hernán
- ItemA Catalog of 203 Galaxy Clusters Serendipitously Detected in the ROSAT PSPC Pointed Observations(1998) Vikhlinin a; Quintana Godoy, Hernán
- ItemA Catalog of Faint Interacting Galaxies in Pairs and Groups(1997) De Mello, D.; Infante Lira, Leopoldo; Menanteau Droguett, Felipe
- ItemA Catalog of Faint Interacting Galaxies in Pairs and Groups. II(1997) Mello, Duília.; Infante Lira, Leopoldo; Menanteau Droguett, Felipe.
- ItemA Catalog of X-ray Point Sources from Two Megaseconds of Chandra Observations of the Galactic Center(2009) Muno, M P.; Bauer, Franz Erik
- ItemA Chandra Catalog of X-Ray Sources in the Central 150 pc of the Galaxy(2006) Muno, M P.; Bauer, Franz Erik
- ItemA Chandra observation of the z= 2.285 galaxy FSC 10214+4724: evidence for a Compton-thick quasar?(2005) Bauer, Franz Erik
- Item
- ItemA Chemical and Kinematical Analysis of the Intermediate-age Open Cluster IC 166 from APOGEE and Gaia DR2(2018) Schiappacasse-Ulloa, J.; Tang, B.; Fernandez-Trincado, J. G.; Zamora, O.; Geisler, D.; Frinchaboy, P.; Schultheis, M.; Dell'Agli, F.; Villanova, S.; Masseron, T.; Meszaros, Sz; Souto, D.; Hasselquist, S.; Cunha, K.; Smith, V. V.; Garcia-Hernandez, D. A.; Vieira, K.; Robin, A. C.; Minniti, D.; Zasowski, G.; Moreno, E.; Perez-Villegas, A.; Lane, R. R.; Ivans, I. I.; Pan, K.; Nitschelm, C.; Santana, F. A.; Carrera, R.; Roman-Lopes, A.