VII
Sochias meeting, Santiago, January 14-16, 2009.
Link
Past VI meeting in
Valparaíso
News
March 1, 2010
Dr. Stuart Sale joins our
staff in a postdoctoral position.
December 1, 2009
Dr. Stuart
Folkes joins our staff in a postdoctoral position.
September 7, 2009
Dr. Luis Vega joins our
staff in a postdoctoral position.
June 1, 2009
Dr. Roberto
Muñoz joins our staff in a postdoctoral position.
March 3, 2008
Veronica Motta (UV) and
Leopoldo Infante (PUC) working with Larry Bradley from
Johns Hopkins University discover the most distant galaxy from
Earth. The results will be published in the Astrophysical Journal. See
the astro-ph preprint abstract
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 Welcome to the CAV
In 2006 the University of
Valparaiso decided to support astrophysical
research
at the UV by creating the Centre of Astrophysics Valparaiso.
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Academic
Staff |
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Open
Positions
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Seminars |
No
positions open currently
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Next talk:
July 13 th,
2010,
2PM
Auditorio de la Facultad
de Ciencias
Dr.Alberto
Rebassa
University of
Valparaíso
"El
Origen de las Enanas de Baja Masa"
Low-mass
white dwarfs (M < 0.5Msun) are thought to have formed in
binaries as
a consequence of strong mass transfer interactions. However, recent
radial velocity and infrared studies of apparently single low-mass
white dwarfs reveal that a significant fraction of these do not have
close companions. In this work we present the first white dwarf mass
distributions directly obtained from observations of a large sample of
post-common envelope binaries (PCEBs) and wide white dwarf-main
sequence binaries (WDMS). The two distributions differ significantly.
Whilst the PCEB sample is dominated by systems containing low-mass
white dwarfs, the white dwarf mass distribution of the wide WDMS
binaries is similar to that of single white dwarfs. Taking into account
observational biases we find that the vast majority of low-mass white
dwarfs must have formed in close binaries.
July 15 th,
2010,
2PM
Sala 10 de la Facultad de
Ciencia
Dr. Todor Popov
University of
Valparaíso
"Creation-Annihilation
Algebras and Young Tableaux"
We
start by recalling the bosonic (fermionic) canonical (anti)commutation
relations of creation-annihilation operators. Then we consider the
field theoretical formalism introduced by H.S. Green as a
generalization of the Bose-Fermi alternative. In the so called Green
parastatistics the exchange symmetry of the operators is governed by
cubic relations instead of the canonical (anti)commutation relations.
The "Fock space" of the parastatistics creation-annihilation algebra
carries a representation of the (particle-)permutation group. The
irreducible representations thereof are labeled by Young diagrams and
the states in the parastatistics "Fock space" are in one-to-one
correspondence with Young tableaux(and their supersymmetric
counterparts). We show how the permutation symmetry can be deformed
into a braid group symmetry into the framework of deformed Green
parastatistics. Finally we use the "Fock space" of the deformed
parastatistics algebra in order to get algebraic structures on
combinatorial objects such as Young Tableaux. We are aimed to keep the
exposition as simple as possible: the preriquisite are only a basic
notion of field theory, permutation and linear group, Young tableaux
will be introduced, students are wellcome.
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| Publications |
Refereed
publications 2009
Refereed
publications 2008
Refereed
publications 2007
Refereed
publications 2006
All refereed publications
All publications |
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| Meeting:
September 25-26, 2008 |
Journals |
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Astronomy & Astrophysics
Astronomical
Journal
AstroPhysical
Journal
Monthly
Notices of the
Royal
Astronomical
Society
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| Hot
Stars Meeting, March 2009 |
Interferometric View of
Hot Stars
Viña del Mar, Chile,
March
2-6, 2009
Read
more ...
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Departamento
de Física
y
Astronomía, Facultad de Ciencias
