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X-WR-CALNAME:Observing the Big Bang
X-ORIGINAL-URL:https://cosmology.nl
X-WR-CALDESC:Events for Observing the Big Bang
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TZID:Europe/Amsterdam
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TZOFFSETFROM:+0100
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DTSTART:20190331T010000
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DTSTART:20191027T010000
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DTSTART;TZID=Europe/Amsterdam:20190111T120000
DTEND;TZID=Europe/Amsterdam:20190111T170000
DTSTAMP:20260616T032513
CREATED:20181019T125214Z
LAST-MODIFIED:20190109T093710Z
UID:386-1547208000-1547226000@cosmology.nl
SUMMARY:Groningen Winter 2019
DESCRIPTION:Groningen\, January 11th 2019 \nThe first THC meeting of the solar year will take place in Groningen. The venue is located downtown Groningen\, at the Harmonie Building\, room 1315.0036\, Oude Kijk in Het Jatstraat 26. \n� \n� \nProgram \n12:00 – 13:00: Talk by Filippo Vernizzi (Saclay) \nTitle: Dark Energy after GW170817 \nAbstract: \nI will discuss some of the consequences of gravitational wave observations on (single field) dark energy and modified gravity. In particular\, I will show that in some models gravitational waves can decay into dark energy and that the absence of this effect provides constraints on the space of parameters. \n13:00 – 14:00: Lunch \n14:00 – 15:00: Talk by Amina Helmi (Groningen University) \nTitle: New views on the Galaxy and its satellites from the Gaia space mission.  \nAbstract: \nThe recent 2nd data release of the Gaia mission took place in April 2018. It is currently revolutionizing our understanding of the Milky Way and its constituents. In this talk\, I will highlight a few of the first results stemming from the analysis of this truly spectacular dataset. In particular\, I will focus on what we have learned about the dynamics\, mass distribution and assembly of the Milky Way and its satellites thus far. \n15:00 – 15:30: Coffee Break \n15:30 – 16:30: Talk by Sebastian Garcia-Saenz (IAP) \nTitle: Sidetracked Inflation \nAbstract: \nHeavy scalar fields can undergo an instability during inflation as a result of their kinetic coupling with the inflaton. This effect is known as the geometrical destabilization of inflation\, as it is caused by the curvature of the internal manifold parametrized by the fields. The instability can drive the system away from its original path in field space into a new inflationary attractor\, a scenario that we call “sidetracked inflation”. This talk will aim at describing the physics of this second phase and its observable consequences. I will show that the behavior of cosmological fluctuations can be understood by means of a single-field effective theory in which perturbations propagate with either a modified dispersion relation\, a reduced speed of sound\, or a speed of sound that is imaginary. The latter case is especially interesting as it leads to novel observational signatures\, and in particular to unusual shapes in the non-Gaussianities. \n�
URL:https://cosmology.nl/event/groningen-winter-2019/
LOCATION:Harmonie Building\, room 1315.0036\, Oude Kijk in Het Jatstraat 26\, Groningen\, 9712 EK\, Netherlands
CATEGORIES:THC meeting
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