Zobrazeno 1 - 10
of 156
pro vyhledávání: '"Fryxell, B."'
Autor:
Robinson, K., Dursi, L. J., Ricker, P. M., Rosner, R., Calder, A. C., Zingale, M., Truran, J. W., Linde, T., Caceres, A., Fryxell, B., Olson, K., Riley, K., Siegel, A., Vladimirova, N.
Publikováno v:
Astrophys.J. 601 (2004) 621-643
Recent Chandra and XMM-Newton observations of galaxy cluster cooling flows have revealed X-ray emission voids of up to 30 kpc in size that have been identified with buoyant, magnetized bubbles. Motivated by these observations, we have investigated th
Externí odkaz:
http://arxiv.org/abs/astro-ph/0310517
Autor:
Alexakis, A., Calder, A. C., Heger, A., Brown, E. F., Dursi, L. J., Truran, J. W., Rosner, R., Lamb, D. Q., Timmes, F. X., Fryxell, B., Zingale, M., Ricker, P. M., Olson, K.
Publikováno v:
Astrophys.J.602:931-937,2004
Many classical nova ejecta are enriched in CNO and Ne. Rosner et al. recently suggested that the enrichment might originate in the resonant interaction between large-scale shear flows in the accreted H/He envelope and gravity waves at the interface b
Externí odkaz:
http://arxiv.org/abs/astro-ph/0307126
Autor:
Dursi, L. J., Zingale, M., Calder, A. C., Fryxell, B., Timmes, F. X., Vladimirova, N., Rosner, R., Caceres, A., Lamb, D. Q., Olson, K., Ricker, P. M., Riley, K., Siegel, A., Truran, J. W.
Publikováno v:
Astrophys.J. 595 (2003) 955-979
Critically understanding the `standard candle'-like behavior of Type Ia supernovae requires understanding their explosion mechanism. One family of models for Type Ia Supernovae begins with a deflagration in a Carbon-Oxygen white dwarf which greatly a
Externí odkaz:
http://arxiv.org/abs/astro-ph/0306176
Autor:
Zingale, M., Woosley, S. E., Cumming, A., Calder, A., Dursi, L. J., Fryxell, B., Olson, K., Ricker, P., Rosner, R., Timmes, F. X.
We look at the spreading of localized temperature perturbations in the accreted fuel layer of a non-rotating neutron star. The pressure at the base of the accreted fuel layer is large and the material is only partially degenerate. Any temperature per
Externí odkaz:
http://arxiv.org/abs/astro-ph/0211336
Autor:
Zingale, M., Dursi, L. J., ZuHone, J., Calder, A. C., Fryxell, B., Plewa, T., Truran, J. W., Caceres, A., Olson, K., Ricker, P. M., Riley, K., Rosner, R., Siegel, A., Timmes, F. X., Vladimirova, N.
Publikováno v:
Astrophys.J.Suppl. 143 (2002) 539-566
We look in detail at the process of mapping an astrophysical initial model from a stellar evolution code onto the computational grid of an explicit, Godunov type code while maintaining hydrostatic equilibrium. This mapping process is common in astrop
Externí odkaz:
http://arxiv.org/abs/astro-ph/0208031
Autor:
Dursi, L. J., Calder, A. C., Alexakis, A., Truran, J. W., Rosner, R., Zingale, M., Fryxell, B., Ricker, P. M., Timmes, F. X., Olson, K.
Publikováno v:
AIP Conf.Proc. 637 (2003) 139-143
Observed novae abundances and explosion energies estimated from observations indicate that there must be significant mixing of the heavier material of the white dwarf (C+O) into the lighter accreted material (H+He). Accordingly, nova models must inco
Externí odkaz:
http://arxiv.org/abs/astro-ph/0207595
Autor:
Calder, A. C., Fryxell, B., Plewa, T., Rosner, R., Dursi, L. J., Weirs, V. G., Dupont, T., Robey, H. F., Kane, J. O., Remington, B. A., Drake, R. P., Dimonte, G., Zingale, M., Timmes, F. X., Olson, K., Ricker, P., MacNeice, P., Tufo, H. M.
Publikováno v:
Astrophys.J.Suppl. 143 (2002) 201-230
We present a case study of validating an astrophysical simulation code. Our study focuses on validating FLASH, a parallel, adaptive-mesh hydrodynamics code for studying the compressible, reactive flows found in many astrophysical environments. We des
Externí odkaz:
http://arxiv.org/abs/astro-ph/0206251
Autor:
Calder, A. C., Fryxell, B., Rosner, R., Dursi, L. J., Olson, K., Ricker, P. M., Timmes, F. X., Zingale, M., MacNeice, P., Tufo, H. M.
We present direct numerical simulations of mixing at Rayleigh-Taylor unstable interfaces performed with the FLASH code, developed at the ASCI/Alliances Center for Astrophysical Thermonuclear Flashes at the University of Chicago. We present initial re
Externí odkaz:
http://arxiv.org/abs/astro-ph/0102239
Autor:
Ricker, P. M., Calder, A. C., Dursi, L. J., Fryxell, B., Lamb, D. Q., MacNeice, P., Olson, K., Rosner, R., Timmes, F. X., Truran, J. W., Tufo, H. M., Zingale, M.
We discuss some of the computational challenges encountered in simulating the evolution of clusters of galaxies. Eulerian adaptive mesh refinement (AMR) techniques can successfully address these challenges but are currently being used by only a few g
Externí odkaz:
http://arxiv.org/abs/astro-ph/0011502
We present results of a cosmological hydrodynamical study of gravitational accretion in cosmic string wakes and filaments. Cosmic string wakes are formed by fast moving (v ~ c) strings. A conical deficit angle in the string spacetime induces a veloci
Externí odkaz:
http://arxiv.org/abs/astro-ph/9704145