[SEMINARI] In few minutes...[SEMINAR] Accretion in spacetimes with the cosmological constant

[Enric Marco]

Accretion in spacetimes with the cosmological constant

Patryk Mach

Jagiellonian University, Institut of Physics, Cracòvia (Polònia)

Seminari del Departament d'Astronomia i Astrofísica, 4a planta
de l'Edifici d'Investigació, a Burjassot.

Dia: dijous 21 de novembre de 2013. Hora: 12:00.

Abstract:

I will discuss spherical, isothermal and polytropic steady accretion
models in the presence of the cosmological constant. Exact solutions
are found for a class of isothermal fluids, assuming the test gas
approximation. These results can have cosmological connotation,
through the Einstein–Straus vacuole model of embedding local
structures into FLRW spacetimes. In particular, one infers that steady
accretion would not exist in the late phases of the Penrose’s scenario
of the evolution of the Universe. If time permits, stability of the
obtained solutions will be also discussed.

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Dr. Enric Marco
Departament d'Astronomia i Astrofísica
Facultat de Física
Universitat de València
C/  Dr. Moliner, 50
46100 Burjassot, Spain
Phone: (34)-96-354-3069
Fax:(34)-96-354-3084
enric.marco en uv.es
www.uv.es/marco
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