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Morphological analysis of the centimeter-wave continuum in the dark cloud LDN 1622
(UNIV CHICAGO PRESS, 2006-03-10)
The spectral energy distribution of the dark cloud LDN 1622, as measured by Finkbeiner using WMAP data, drops above 30 GHz and is suggestive of a Boltzmann cutoff in grain rotation frequencies, characteristic of spinning ...
Seeking the local convergence depth: The Abell cluster dipole flow to 200 h(-l) Mpc
(UNIV CHICAGO PRESS, 1999-01-01)
We have obtained new Tully-Fisher (TF) peculiar velocity measurements for 52 Abell galaxy clusters distributed throughout the sky between similar to 50 and 200 h(-1) Mpc. The measurements are based on 1-band photometry and ...
Mass extinctions, galactic orbits in the solar neighborhood and the Sun: a connection?
(International Astronomical UnionFlorianópolis, 2013)
The orbits of the stars in the disk of the Galaxy,
and their passages through the Galactic spiral arms,
are a rarely mentioned factor of biosphere stability
which might be important for long-term planetary
climate ...
Correcion de mapas de rcf por contaminacion galáctica y estimación del cuadripolo cosmológico
(Universidad Nacional de Colombia, Bogotá, 1998)
Se presenta el mapa de la radiación de la galaxia a 2300 MHz, producido con los datos obtenidos durante la estadía del radiotelescopio GEM en Colombia. Se halla a dependencia del índice espectral de la radiación de la ...
THE INTERSTELLAR MAGNETIC FIELD CLOSE TO THE SUN. II.
(IOP PUBLISHING LTDBRISTOL, 2012)
The magnetic field in the local interstellar medium (ISM) provides a key indicator of the galactic environment of the Sun and influences the shape of the heliosphere. We have studied the interstellar magnetic field (ISMF) ...
Global median model of the F2-layer peak height based on ionospheric radio-occultation and ground-based Digisonde observations
(Elsevier, 2015-05-25)
In this article, we present a global median model of the ionospheric F2-layer peak height (hmF2), which we named Satellite and Digisonde Model of the F2 layer (SDMF2). This model is based on the radio-occultation data of ...
Modelo não linear de dínamo solar unidimensional
(Universidade Federal de Minas GeraisBrasilICX - DEPARTAMENTO DE FÍSICAPrograma de Pós-Graduação em FísicaUFMG, 2020-03-10)
In this work we study the generation of the large scale magnetic fields observed in cosmic objects using analytical and numerical turbulent mean-field dynamo models. We use a simplified, one-dimensional formulation, with ...
High-energy radiation from the impact of high-velocity clouds on the galactic disk
(American Institute of Physics, 2017)
High-velocity clouds (HVCs) are HI clouds with velocities of more than 100 km s−1. These clouds do not partake of thedifferential Galactic rotation; a significant fraction of them are falling down towards the Galactic disk. ...