1.4k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universidad Nacional Autónoma de MéxicoMX165 papers
- Fermi National Accelerator LaboratoryUS154 papers
- Centre National de la Recherche ScientifiqueFR114 papers
- Centro de Investigación y de Estudios Avanzados del Instituto Politécnico NacionalMX106 papers
- University of PittsburghUS102 papers
- Centro Brasileiro de Pesquisas FísicasBR97 papers
- University of RochesterUS89 papers
- University of MichiganUS84 papers
- University College LondonGB75 papers
- Instituto Politécnico NacionalMX72 papers
- University of FloridaUS69 papers
- University of MilanIT69 papers
26 papers · 1 filter
Dual Description of Supergravity MacDowell-Mansouri Theory
H. Garcia-Compean, A. Nieto, O. Obregon +1
In the context of field theory two elements seem to be necessary to search for strong-weak coupling duality. First, a gauge theory formulation and second, supersymmetry. For gravit…
Nancay blind 21cm line survey of the Canes Venatici group region
R. C. Kraan-Korteweg, W. van Driel, F. Briggs +2
A radio spectroscopic driftscan survey in the 21cm line with the Nancay Radio Telescope of 0.08 steradians of sky in the direction of the constellation Canes Venatici covering a he…
VLA Observations of the giant Radio Galaxy 3C 449
L. Feretti, R. Perley, G. Giovannini +1
In this paper we present multifrequency VLA observations of the giant radio galaxy 3C 449, obtained with high sensitivity and resolution in total intensity and polarized flux. Thes…
Multi-Wavelength Surveys for Galaxies Hidden by the Milky Way
R. C. Kraan-Korteweg
The systematic mapping of obscured and optically invisible galaxies behind the Milky Way through complementary surveys are important in arriving at the whole-sky distribution of co…
On the relation of the gravitino mass and the GUT parameters
V. I. Tkach, J. J. Rosales, J. Torres
In this article we consider the local supersymmetry breaking and the broken SU(5) symmetry permisible by dilaton vacuum configuration in supergravity theories. We establish the par…
Short survey of Darboux transformations
H. C. Rosu
A selective chronological survey of Darboux transformations as related to supersymmetric quantum mechanics, intertwining operators and inverse scattering techniques is presented. S…
New HI-detected Galaxies in the Zone of Avoidance
L. Staveley-Smith, S. Juraszek, B. S. Koribalski +8
We present the first results of a blind HI survey for galaxies in the southern Zone of Avoidance with a multibeam receiver on the Parkes telescope. This survey is eventually expect…
Library & Information Services: as Astronomer's Wishlist
Heinz Andernach
I review some of the past and current methods for retrieval of literature and other published information, excluding commercial services. Much of this is a personal view and based…
q deformation by intertwining with application to the singular oscillator
H. C. Rosu, C. Castro
We present a version of q-deformed calculus based on deformed counterparts of Darboux intertwining operators. The case in which the deformed transformation function is of the vacuu…
Internet Resources for Radio Astronomy
Heinz Andernach
A subjective overview of Internet resources for radio-astronomical information is presented. Basic observing techniques and their implications for the interpretation of publicly av…
Internet Services for Professional Astronomy
Heinz Andernach
A (subjective) overview of Internet resources relevant to professional astronomers is given. Special emphasis is put on databases of astronomical objects and servers providing gene…
Pursuing Gravitational S-Duality
H. Garcia-Compean, O. Obregon, C. Ramirez
Recently a strong-weak coupling duality in non-abelian non-supersymmetric theories in four dimensions has been found. An analogous procedure is reviewed, which allows to find the `…
Self-dual gravity and self-dual Yang-Mills in the context of Macdowell-Mansouri formalism
J. A. Nieto, J. Socorro
In this work we propose an action which unifies self-dual gravity and self-dual Yang-Mills in the context of the Macdowell-Mansouri formalism. We claim that such an action may be u…
Dual symmetry and the vacuum energy
V. I. Tkach, J. Socorro, J. J. Rosales +1
In this work we present a new hidden symmetry in gravity for the scale factor in the FRW model, for . This exact symmetry vanishes the cosmological constant. We interpret this…
Supersymmetric FRW model and the ground state of supergravity
V. I. Tkach, J. J. Rosales, J. Socorro
In this work we construct the vacuum configuration of supergravity interacting with homogeneous complex scalar matter fields. The corresponding configuration is of the FRW model in…
General scalar interaction in the supersymmetric FRW model
V. I. Tkach, J. J. Rosales, J. Socorro
In this work we have constructed the most general action for a set of complex homogeneous scalar supermultiplets interacting with the scale factor in the supersymmetric FRW model.…
Dust Spirals and Acoustic Noise in the Nucleus of the Galaxy NGC 2207
B. G. Elmegreen, D. M. Elmegreen, E. Brinks +6
Observations with the Hubble Space Telescope reveal an irregular network of dust spiral arms in the nuclear region of the interacting disk galaxy NGC 2207. The spirals extend from…
Ring structure and warp of NGC5907 -- Interaction with dwarf galaxies
Zhaohui Shang, Zhongyuan Zheng, Elias Brinks +22
The edge-on, nearby spiral galaxy NGC5907 has long been used as the prototype of a ``non-interacting'' warped galaxy. We report here the discovery of two interactions with companio…
CCD Photometry of the High Amplitude Delta Scuti Stars V798 Cyg and V831 Tau
Federica Musazzi, Ennio Poretti, Stefano Covino +1
The possibility to perform the frequency analysis of the light variation of V798 Cyg on the basis of a more accurate set of data and the Fourier decomposition of the new light curv…
X-ray Emission from an Expanding Supergiant Shell in IC 2574
Fabian Walter, Jürgen Kerp, Neb Duric +2
We present a multi--wavelength study of a supergiant shell within the violent interstellar medium of the nearby dwarf galaxy IC 2574, a member of the M81 group of galaxies. Neutral…
Multipole solutions in metric--affine gravity
José Socorro, Claus Lämmerzahl, Alfredo Macías +1
Above Planck energies, the spacetime might become non--Riemannian, as it is known fron string theory and inflation. Then geometries arise in which nonmetricity and torsion appear a…
Galaxies behind the deepest extinction layer of the southern Milky Way
Renee C. Kraan-Korteweg, Baerbel Koribalski, Sebastian Juraszek
About 25% of the optical extragalactic sky is obscured by the dust and stars of our Milky Way. Dynamically important structures might still lie hidden in this zone. Various approac…
Multiwavelength Observations of a Seyfert 1 Galaxy Detected in ACO 3627
P. A. Woudt, R. C. Kraan-Korteweg, A. P. Fairall +3
ACO 3627 is a rich, nearby cluster of galaxies at the core of the Great Attractor. At the low galactic latitude of b = -7.2 the galactic extinction is significant. Nevertheless, it…
Plebański-Demiański-like solutions in metric-affine gravity
A. Garcia, F. W. Hehl, C. Laemmerzahl +2
We consider a (non--Riemannian) metric--affine gravity theory, in particular its nonmetricity--torsion sector ``isomorphic'' to the Einstein--Maxwell theory. We map certain Einstei…