Browsing DFA - Artículos by Author "Miguel Agustino, Enrique de"
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Accretion-disc precession in UX Ursae Majoris
Miguel Agustino, Enrique de; Patterson, Joseph (Oxford University Press, 2016)
We report the results of a long campaign of time-series photome try on the nova-like variable UX Ursae Majoris during 2015. It spanned 150 nights, with ~ 1800 h ours of coverage on 121 separate nights. ... -
An accurate density functional theory for the vapor-liquid interface of associating chain molecules based on the statistical associating fluid theory for potentials of variable range
Gloor, Guy J.; Jackson, George; Jiménez Blas, Felipe; Martín del Río, Elvira; Miguel Agustino, Enrique de
(American Institute of Physics, 2004)
A Helmholtz free energydensity functional is developed to describe the vapor-liquid interface of associating chain molecules. The functional is based on the statistical associating fluid theory with attractive potentials ... -
BK Lyncis: the oldest old nova?... and a Bellwether for cataclysmic variable evolution
Patterson, Joseph; Uthas, Helena; Kemp, Jonathan; Miguel Agustino, Enrique de; Krajci, Thomas; Foote, Jerry; Hambsch, Franz-Josef; Campbell, Tut; Roberts, George; Cejudo, David; Dvorak, Shawn; Vanmunster, Tonny; Koff, Robert; Skillman, David; Harvey, David; Martin, Brian; Rock, John; Boyd, David; Oksanen, Arto; Morelle, Etienne; Ulowetz, Joseph; Kroes, Anthony; Sabo, Richard; Jensen, Lasse (Oxford University Press, 2013)
We summarize the results of a 20-year campaign to study the light curves of BK Lyncis, a nova-like star strangely located below the 2-3 hour orbital period gap in the family of cataclysmic variables. Two apparent ... -
Communications : evidence for the role of fluctuations in the thermodynamics of nanoscale drops and the implications in computations of the surface tension
Sampayo, José G.; Malijevský, Alexandr; Müller, Erich A.; Miguel Agustino, Enrique de; Jackson, George (American Institute of Physics, 2010)
Test-area deformations are used to analyze vapor-liquid interfaces of Lennard-Jones particles by molecular dynamics simulation. For planar vapor-liquid interfaces the change in free energy is captured by the average of ... -
Computer simulation study of the global phase behavior of linear rigid Lennard-Jones chain molecules : comparison with flexible models
Galindo, A.; Vega, C.; Sanz, E.; MacDowell, Luis G.; Miguel Agustino, Enrique de; Jiménez Blas, Felipe
(American Institute of Physics, 2004)
The global phase behavior ~i.e., vapor-liquid and fluid-solid equilibria! of rigid linear Lennard-Jones ~LJ! chain molecules is studied. The phase diagrams for three-center and five-center rigid model molecules are ... -
Critical properties of molecular fluids from the virial series
MacDowell, Luis G.; Menduiña, C.; Vega, C.; Miguel Agustino, Enrique de(American Institute of Physics, 2003)
We present results for the fourth virial coefficient of quadrupolar Lennard-Jones diatomics for several quadrupole moments and elongations. The coefficients are employed to predict the critical properties from two different ... -
Determination of the melting point of hard spheres from direct coexistence simulation methods
Noya, Eva G.; Vega, C.; Miguel Agustino, Enrique de(American Institute of Physics, 2008)
We consider the computation of the coexistence pressure of the liquid-solid transition of a system of hard spheres from direct simulation of the inhomogeneous system formed from liquid and solid phases separated by an ... -
From outburst to quiescence: spectroscopic evolution of V1838 Aql imbedded in a bow-shock nebula
Hernández Santisteban, J. V.; Zharikov, S.; Neustroev, V.; Miguel Agustino, Enrique de(Royal Astronomical Society, 2019-04)
We analyse new optical spectroscopic, direct-image and X-ray observations of the recently discovered a high-proper motion cataclysmic variable V1838 Aql. The data were obtained during its 2013 superoutburst and its ... -
The global phase diagram of the Gay–Berne model
Miguel Agustino, Enrique de; Vega, C. (American Institute of Physics, 2002)
The phase diagram of the Gay–Berne model with anisotropy parameters k53, k 855 has been evaluated by means of computer simulations. For a number of temperatures, NPT simulations were performed for the solid phase leading ... -
The helium-rich cataclysmic variable SBSS 1108+574
Carter, P. J.; Steeghs, D.; Miguel Agustino, Enrique de; Goff, W.; Koff, Robert; Krajci, Thomas; Marsh, T. R.; Gänsicke, B. T.; Breedt, E.; Groot, P. J.; Nelemans, G.; Roelofs, G. H. A.; Rau, A.; Koester, D.; Kupfer, T. (Oxford University Press, 2013)
We present time-resolved spectroscopy and photometry of the dwarf nova SBSS 1108+574, obtained during the 2012 outburst. Its quiescent spectrum is unusually rich in helium, showing broad, double-peaked emission lines from ... -
IX Draconis – a curious ER UMa-type dwarf nova
Otulakowska-Hypka, M.; Olech, A.; Miguel Agustino, Enrique de; Rutkowski, A.; Koff, Robert; Ba֒kowska, K. (Oxford University Press, 2013)
We report results of an extensive worldwide observing campaign devoted to a very active dwarf nova star – IX Draconis. We investigated photometric behaviour of the system to derive its basic outburst properties and understand ... -
The nature of the calculation of the pressure in molecular simulations of continuous models from volume perturbations
Miguel Agustino, Enrique de; Jackson, George (American Institute of Physics, 2006)
We consider some fundamental aspects of the calculation of the pressure from simulations by performing volume perturbations. The method, initially proposed for hard-core potentials by Eppenga and Frenkel Mol. Phys. 52, ... -
Optical photometric and spectral study of the new FU Orionis object V2493 Cygni (HBC 722)
Semkov, E. H.; Peneva, S. P.; Munari, U.; Tsvetkov, M. K.; Jurdana-Šepić, R.; Miguel Agustino, Enrique de; Schwartz, R. D.; Dimitrov, D. P.; Kjurkchieva, D. P.; Radeva, V. S. (European Southern Observatory, 2012)
Aims. We present new results from optical photometric and spectroscopic observations of the eruptive pre-main sequence star V2493 Cyg (HBC 722). The object has continued to undergo significant brightness variations over ... -
OT J075418.7+381225 and OT J230425.8+062546: Promising candidates for the period bouncer
Nakata, Chikako; Miguel Agustino, Enrique de; Muyllaert, Eddy (Astronomical Society of Japan, 2014)
We report on photometric observations of two dwarf novae, OT J075418.7+381225 and OT J230425.8+062546, which showed superoutbursts in 2013 (OT J075418) and in 2011 (OT J230425). Their mean periods of the superhump were ... -
The phase diagram of the two center Lennard-Jones model as obtained from computer simulation and Wertheim’s thermodynamic perturbation theory
Vega, C.; Miguel Agustino, Enrique de; Jiménez Blas, Felipe
; Galindo, A. (American Institute of Physics, 2003)
The global phase diagram (i.e., vapor–liquid and fluid–solid equilibrium) of two-center Lennard-Jones (2CLJ) model molecules of bond length L=σ has been determined by computer simulation. The vapor–liquid equilibrium ... -
SDSS J162520.29+120308.7 – a new SU Ursae Majoris star in the period gap
Olech, A.; Miguel Agustino, Enrique de; Otulakowska-Hypka, M.; Thorstensen, J. R.; Rutkowski, A.; Novak, R.; Masi, G.; Richmond, M.; Staels, B.; Lowther, S.; Stein, W.; Ak, T.; Boyd, David; Koff, Robert; Patterson, Joseph; Eker, Z. (European Southern Observatory, 2011)
We report results of an extensive world-wide observing campaign devoted to the recently discovered dwarf nova SDSS J162520.29+120308.7 (SDSS J1625). The data were obtained during the July 2010 eruption of the star and in ... -
Superhumps and spin-period variations in the intermediate polar RX J2133.7+5107
Miguel Agustino, Enrique de; Patterson, Joseph; Myers, J. (Oxford University Press, 2017)
We report the results of long-term time series photometry on RX J2133.7+5107, an intermediate polar distinguished by its long orbital period (7.14 h) and rapid rotation (571 s) of its white dwarf. The light curves show the ... -
Surface tension of the most popular models of water by using the test-area simulation method
Vega, C.; Miguel Agustino, Enrique de(American Institute of Physics, 2007)
We consider the calculation of the surface tension from simulations of several models of water, such as the traditional TIP3P, SPC, SPC/E, and TIP4P models, and the new generation of TIP4P-like models including the ... -
Test-area simulation method for the direct determination of the interfacial tension of systems with continuous or discontinuous potentials
Gloor, Guy J.; George, Jackson; Jiménez Blas, Felipe; Miguel Agustino, Enrique de
(American Institute of Physics, 2005)
A novel test-area TA technique for the direct simulation of the interfacial tension of systems interacting through arbitrary intermolecular potentials is presented in this paper. The most commonly used method invokes ... -
Third virial coefficients and critical properties of quadrupolar two center Lennard-Jones models
MacDowell, Luis G.; Menduiña, C.; Vega, C.; Miguel Agustino, Enrique de(Royal Society of Chemistry, 2003)
We report numerical results for the third virial coefficient of two center Lennard-Jones quadrupolar molecules. Calculations are performed for 35 models with different elongations and quadrupoles over a temperature range ...