Browsing Research publications by Author "Martinez-Sansigre, A."
Now showing items 1-4 of 4
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An 80-kpc Ly alpha halo around a high-redshift type-2 quasi-stellar object
Smith, Daniel; Jarvis, M.J.; Simpson, C.; Martinez-Sansigre, A. (2009)We announce the discovery of an extended emission line region associated with a high redshift type-2 QSO. The halo, which was discovered in our new wide-field narrow-band survey, resides at z = 2.85 in the Spitzer First ... -
Evidence for a maximum jet efficiency for the most powerful radio galaxies
Fernandes, C.A.C.; Jarvis, M.J.; Rawlings, S.; Martinez-Sansigre, A.; Hatziminaoglou, E.; Lacy, M.; Page, M.J.; Stevens, Jason; Vardoulaki, E. (2011-03)We use new mid-infrared (mid-IR) photometry from the Spitzer Space Telescope to study the relations between low-frequency radio luminosity density L-nu 151 (MHz), mid-IR (12 mu m rest frame) luminosity nu L-nu 12 (mu m) ... -
The obscuration by dust of most of the growth of supermassive black holes
Martinez-Sansigre, A.; Rawlings, S.; Lacy, M.; Fadda, D.; Marleau, F.; Simpson, C.; Willott, C.J.; Jarvis, M.J. (2005) -
A population of high-redshift type-2 quasars-I. Selection criteria and optical spectra
Martinez-Sansigre, A.; Rawlings, S.; Lacy, M.; Fadda, D.; Jarvis, M.J.; Marleau, F.; Simpson, C.; Willott, C.J. (2006)