University of Groningen
Gravitational lensing at milliarcsecond angular resolution Spingola, Cristiana
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Publication date: 2019
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Spingola, C. (2019). Gravitational lensing at milliarcsecond angular resolution. Rijksuniversiteit Groningen.
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Propositions
accompanying the dissertation
Gravitational lensing
at milliarcsecond angular resolution
by
Cristiana Spingola
1. Astrometric anomalies in strong gravitational lenses measured with VLBI observations indicate the failure of a smooth lens mass model at milliarcsec-ond scales (Chapter 2).
2. A mass density slope steeper than isothermal in low-mass elliptical lensing galaxies supports the two-phase galaxy formation model (Chapter 2). 3. The combination of strong gravitational lensing with high-resolution
spa-tially resolved kinematics reveals rotation and interaction in molecular gas of high-redshift galaxies, providing new clues to their formation (Chapter 3).
4. Multi-epoch VLBI observations of gravitationally lensed radio sources at high redshift can reveal astrometric positional changes of the order of tens of microarcseconds, testing formation models for supermassive black holes (Chapter 4).
5. Major advances in wide-field VLBI surveys enable efficient one-step high-resolution searches for gravitationally lensed radio sources (Chapter 5). 6. The gravitational imaging technique applied to sensitive VLBI observations
of strong lensing systems is a promising method to probe low-mass sub-structures, which are the key population for testing dark matter models. 7. The mindful sharing of data and software in Astronomy should be adopted
by the entire scientific community, as it ensures the progress of science rather than that of individual research groups.
8. The culinary art requiring the highest accuracy is patisserie. 9. Kindness is a relief in a society afflicted by hatred.
