J. M. Marcaide
Spanish National Research Council
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Featured researches published by J. M. Marcaide.
The Astrophysical Journal | 1980
W. D. Cotton; J. J. Wittels; I. I. Shapiro; J. M. Marcaide; F. N. Owen; S. R. Spangler; A. Rius; C. Angulo; T. A. Clark; C. A. Knight
Multifrequency interferometric and total flux density measurements of the radiation from 0735 plus 178 are discussed. It is shown that it is far more likely that the very flat radio spectrum of this source results from a superposition of incoherent synchrotron radiation from four distinct, homogeneous components, each with a peaked spectrum, than from radiation from a single inhomogeneous component.
The Astrophysical Journal | 1995
T. Venturi; C. Castaldini; W. D. Cotton; L. Feretti; G. Giovannini; L. M. Lara; J. M. Marcaide; Ann E. Wehrle
We present 5 GHz global VLBI observations of the two Fanaroff Riley Type I radio galaxies B2 0836+29 and 3C465 (2335+26). For 3C465 we present also 1.7 GHz and 8.4 GHz global VLBI data. In addition VLA observations were used to obtain arsecond resolution continuum and polarization maps at 5 GHz. Both sources are very asymmetric on the parsec-scale, with a core and a one-sided jet, aligned with the main arcsecond scale jet. We place a limit on the milliarcsecond jet to counterjet brightness ratio B
The Astrophysical Journal | 1993
A. Alberdi; J. M. Marcaide; Alan P. Marscher; Y. F. Zhang; Pedro Elosegui; J. L. Gómez; David B. Shaffer
_{jet}
The Astrophysical Journal | 1982
N. Bartel; I. I. Shapiro; B. E. Corey; J. M. Marcaide; Alan E. E. Rogers; Alan R. Whitney; R. J. Cappallo; D. A. Graham; Jonathan D. Romney; R. A. Preston
/B
The Astronomical Journal | 1995
J. C. Guirado; J. M. Marcaide; A. Alberdi; Pedro Elosegui; M. I. Ratner; I. I. Shapiro; R. Kilger; F. Mantovani; Tiziana Venturi; A. Rius; E. Ros; C. Trigilio; Alan R. Whitney
_{cjet}
Nature | 1985
J. M. Marcaide; N. Bartel; Marc V. Gorenstein; I. I. Shapiro; B. E. Corey; Alan E. E. Rogers; J. C. Webber; T. A. Clark; J. D. Romney; R. A. Preston
\gtsim 20 and \gtsim 30 for B2 0836+29 and 3C465 respectively. For 3C465 the strong asymmetry holds to the kiloparsec scale. The brightness asymmetry and the ratio between the core radio power and total radio power allow us to constrain the jet velocity close to the core and the orientation of the radio structure with respect to the line of sight. The results suggest that the plasma speed is relativistic on the parsec scale for both sources, i.e. v
Astronomy and Astrophysics | 2011
Ivan Marti-Vidal; V. Tudose; Z. Paragi; J. Yang; J. M. Marcaide; J. C. Guirado; E. Ros; A. Alberdi; M. A. Perez-Torres; M. K. Argo; A. J. van der Horst; M. A. Garrett; Christopher John Stockdale; Kurt W. Weiler
_{jet}
The Astrophysical Journal | 1994
R. M. Campbell; B. E. Corey; E. E. Falco; I. I. Shapiro; Marc V. Gorenstein; Pedro Elosegui; J. M. Marcaide; K. Alvi
\gtsim 0.75c for B2 0836+29 and v
The Astrophysical Journal | 1990
V. Dhawan; N. Bartel; Alan E. E. Rogers; T. P. Krichbaum; A. Witzel; D. A. Graham; I. I. K. Pauliny-Toth; B. O. Roênnaêng; Hisashi Hirabayashi; Makoto Inoue; C. R. Lawrence; I. I. Shapiro; Bernard F. Burke; R. S. Booth; Anthony C. S. Readhead; M. Morimoto; K. J. Johnston; J. H. Spencer; J. M. Marcaide
_{jet}
The Astrophysical Journal | 1984
N. Bartel; I. I. Shapiro; B. E. Corey; Alan E. E. Rogers; A. R. Whitney; R. J. Cappallo; J. M. Marcaide; D. A. Graham; H. Kuhr; L.B. Bååth
\gtsim 0.6c for 3C465. While v
