152 citations · 290 across the 10 of their papers we have counts for
10 papers
Stellar mass Primordial Black Holes as Cold Dark Matter
J. L. G. Sobrinho, P. Augusto
Primordial Black Holes (PBHs) might have formed in the early Universe due to the collapse of density fluctuations. PBHs may act as the sources for some of the gravitational waves r…
New thresholds for Primordial Black Hole formation during the QCD phase transition
J. L. G. Sobrinho, P. Augusto, A. L. Gonçalves
Primordial Black Holes (PBHs) might have formed in the early Universe as a consequence of the collapse of density fluctuations with an amplitude above a critical value : the…
Future mmVLBI Research with ALMA: A European vision
R. P. J. Tilanus, T. P. Krichbaum, J. A. Zensus +165
Very long baseline interferometry at millimetre/submillimetre wavelengths (mmVLBI) offers the highest achievable spatial resolution at any wavelength in astronomy. The anticipated…
Direct detection of Black Holes via electromagnetic radiation
J. L. G. Sobrinho, P. Augusto
Many black hole (BH) candidates exist, ranging from supermassive (-- M) to stellar masses (-- M), all of them identified by in…
Flat-spectrum symmetric objects with ~1 kpc sizes I. The candidates
Pedro Augusto, J. Ignacio Gonzalez-Serrano, Ismael Perez-Fournon +1
In order to understand the origin and evolution of radio galaxies, searches for the youngest such sources have been conducted. Compact-medium symmetric objects (CSO-MSOs) are thoug…
The radio properties of the cD galaxy of Abell 2390
Pedro Augusto, Alastair C. Edge, Claire J. Chandler
We present multi-frequency, multi-epoch radio imaging of the complex radio source B2151+174 in the core of the cluster, Abell 2390 (z~0.23). From new and literature data we conclud…
Modelling The First Probable Two Plane Lens System B2114+022: Reproducing Two Compact Radio Cores A, D
K. -H. Chae, S. Mao, P. Augusto
We test possible lensing scenarios of the JVAS system B2114+022, in which two galaxies at different redshifts (``G1'' at and ``G2'' at ) are found with…
Limits on the cosmological abundance of supermassive compact objects from a search for multiple imaging in compact radio sources
P. N. Wilkinson, D. R. Henstock, I. W. A. Browne +7
Using Very Long Baseline Interferometry we have searched a sample of 300 compact radio sources for examples of multiple imaging produced by gravitational lensing; no multiple image…
An observational constraint on gravitational lensing by objects of mass 10^(9.5) - 10^(10.9) Mo
Pedro Augusto, Peter N. Wilkinson
A radio-based search for strong gravitational lensing, with image separations in the range 160-300 milliarcsec (mas), has yielded a null result for a sample of 1665 sources (August…
The kpc-scale radio source population
Pedro Augusto, J. Ignacio Gonzalez-Serrano, Alastair C. Edge +3
We are conducting a multi-wavelength (radio, optical, and X-ray) observational campaign to classify, morphologically and physically, a sample of 55 flat-spectrum radio sources domi…