The following talks take place at DAMTP, the Cavendish Laboratory or the Institute of Astronomy and are not organised by this group. However, they might by related to research that is done within this group at DAMTP.
The Gaia Sausage - our Galaxy?s last major merger
Abstract not available
- Part of Institute of Astronomy Seminars
- Speaker: Vasily Belokurov
- Wednesday 20 February 2019, 13:15-13:45
- Sackler Lecture Theatre, IoA.
Sausage-Mania ? more Mouth-watering Recipes
Abstract not available
- Part of Institute of Astronomy Seminars
- Speaker: Wyn Evans
- Wednesday 20 February 2019, 13:45-14:15
- Sackler Lecture Theatre, IoA.
The computational challenge of the Square Kilometre Array
The Square Kilometre Array (SKA) which is due to become operational in the mid-2020s will be a step change in Radio Astronomy. The deluge of data that the SKA will produce will be challenging to process. I will talk about the science goals of the SKA and the design of the high-performance computing systems to process the data.
- Part of Data Intensive Science Seminar Series
- Speaker: Mark Ashdown - SKA
- Thursday 21 February 2019, 13:00-14:30
- Kavli Large Meeting Room, Kavli Building.
Transformative advances in post-main-sequence planetary system science
Connecting planetary systems at different stages of stellar evolution helps us understand their formation, evolution, and fate, and provides us with exclusive and crucial insights about their dynamics and chemistry. Post-main-sequence white dwarf and giant branch stars host planetary systems that include a variety of observed objects and phenomena, such as planetary debris discs, disintegrating and embedded asteroids, and photospheric metal pollution. Here, I provide a review of both our current knowledge of these systems and models which have been used to explain them. I also highlight the transformative advances expected in upcoming years with the current and next generation of ground-based and space-based initiatives. Looming orders-of-magnitude increases in available data must be accompanied by novel theories and simulations in order to understand the results from this interdisciplinary and expanding research field.
- Part of Institute of Astronomy Colloquia
- Speaker: Dimitri Veras (Warwick)
- Thursday 21 February 2019, 16:00-17:00
- Sackler Lecture Theatre, IoA (tea at 3:30 pm).
The discreteness-driven relaxation of collisionless gravitating systems
The violent relaxation of a perturbed or collapsing collisionless gravitational system, with the fast achievement of a quasi-stationary state, is traditionally assumed to be governed by the Vlasov equation, in which case the entropy must be conserved. In this scenario, the reconciliation with the 2nd law of thermodynamics is made through coarse-graining (a subjective effect). In this talk, I will discuss recent results obtained with entropy estimates in N-body simulations and for orbit ensembles in fixed external potentials. In the N-body simulations, the (slow) long-term evolution is well described as resulting from two-body relaxation, while the early evolution generates a fast (in a few crossing times) entropy production. The integration of orbit ensembles in external potentials shows that this early collisionless relaxation is due to the discreteness (finite N) of gravitating systems in any potential, being a consequence of the Nyquist-Shannon theorem, which precludes the development of phase-space structures finer than a typical scale N-1/d (for a sample of size N in d dimensions). As a result, a typical relaxation time T/tau_cr 0.1 * N1/6 emerges in integrable potentials, with weaker N-dependencies in the presence of chaotic orbits. Furthermore, this scenario avoids the need for the subjective effect of coarse-graining and indicates that the Vlasov equation does not provide an adequate kinetic description of this fast (violent) collisionless relaxation.
- Part of Institute of Astronomy Galaxies Discussion Group
- Speaker: Beraldo e Silva (U Central Lancashire)
- Friday 22 February 2019, 11:30-12:30
- Kavli Large Meeting Room, Kavli Building.
Tidal flows in planets and stars
Abstract not available
- Part of Fluid Mechanics (DAMTP)
- Speaker: Adrian Barker, University of Leeds
- Friday 22 February 2019, 16:00-17:00
- MR2, Centre for Mathematical Sciences, Wilberforce Road, Cambridge.
Title to be confirmed
Abstract not available
- Part of Exoplanet Meetings
- Speaker: Mihkel Kama
- Tuesday 26 February 2019, 16:00-17:00
- Martin Ryle Seminar Room, Kavli Institute.
Title to be confirmed
Abstract not available
- Part of Data Intensive Science Seminar Series
- Speaker: Stephanie Wright - The Hut Group
- Thursday 28 February 2019, 13:00-14:30
- Kavli Large Meeting Room, Kavli Building.
Internal Kinematics of Galactic Globular Clusters with HST Proper Motions
Abstract not available
- Part of Institute of Astronomy Colloquia
- Speaker: Laura Watkins (ESO)
- Thursday 28 February 2019, 16:00-17:00
- Sackler Lecture Theatre, IoA (tea at 3:30 pm).
Compact HII galaxies
Abstract not available
- Part of Institute of Astronomy Galaxies Discussion Group
- Speaker: Ricardo Chavez (UNAM)
- Friday 01 March 2019, 11:30-12:30
- Kavli Large Meeting Room, Kavli Building.
Atmospheric dispersion in cities
Abstract not available
- Part of Fluid Mechanics (DAMTP)
- Speaker: Stephen Belcher, Met Office
- Friday 01 March 2019, 16:00-17:00
- MR2, Centre for Mathematical Sciences, Wilberforce Road, Cambridge.
Title to be confirmed
Abstract not available
- Part of Exoplanet Meetings
- Speaker: Ed Gillen (Cambridge)
- Tuesday 05 March 2019, 16:00-17:00
- Martin Ryle Seminar Room, Kavli Institute.
Title to be confirmed
Abstract not available
- Part of Institute of Astronomy Seminars
- Speaker: Asa Bluck
- Wednesday 06 March 2019, 13:15-13:45
- Sackler Lecture Theatre, IoA.
Title to be confirmed
Abstract not available
- Part of Institute of Astronomy Seminars
- Speaker: Sophie Koudmani
- Wednesday 06 March 2019, 13:45-14:15
- Sackler Lecture Theatre, IoA.
Title to be confirmed
Abstract not available
- Part of Data Intensive Science Seminar Series
- Speaker: Milos Krkic - BP (Supply and Trading)
- Thursday 07 March 2019, 13:00-14:30
- Kavli Large Meeting Room, Kavli Building.
Heavy elements in red giant stars
Abstract not available
Eddington Lecture 2019
- Part of The Eddington Lectures
- Speaker: Amanda Karakas (Monash)
- Thursday 07 March 2019, 16:00-17:00
- Sackler Lecture Theatre, IoA (tea at 3:30 pm).
Bio-inspired control of pressure fluctuations and trailing edge noise
Abstract not available
- Part of Fluid Mechanics (DAMTP)
- Speaker: William Devenport, Virginia Tech
- Friday 08 March 2019, 16:00-17:00
- MR2, Centre for Mathematical Sciences, Wilberforce Road, Cambridge.
Title to be confirmed
Abstract not available
- Part of Exoplanet Meetings
- Speaker: Stefan Lines (Exeter)
- Tuesday 12 March 2019, 16:00-17:00
- Martin Ryle Seminar Room, Kavli Institute.
Title to be confirmed
Abstract not available
- Part of Institute of Astronomy Seminars
- Speaker: Martin Haehnelt
- Wednesday 13 March 2019, 13:15-13:45
- Sackler Lecture Theatre, IoA.
Title to be confirmed
Abstract not available
- Part of Institute of Astronomy Seminars
- Speaker: Jason Sanders
- Wednesday 13 March 2019, 13:45-14:15
- Sackler Lecture Theatre, IoA.
Title to be confirmed
Abstract not available
- Part of Data Intensive Science Seminar Series
- Speaker: Damian Rumble - Aviva
- Thursday 14 March 2019, 13:00-14:30
- Kavli Large Meeting Room, Kavli Building.
Deconstructing stellar halos in the Local Group
Abstract not available
- Part of Institute of Astronomy Colloquia
- Speaker: Alan McConnachie (U Vic)
- Thursday 14 March 2019, 16:00-17:00
- Sackler Lecture Theatre, IoA (tea at 3:30 pm).
Electricity in liquid foams
Abstract not available
- Part of Fluid Mechanics (DAMTP)
- Speaker: Anne-Laure Biance, ILM Lyon
- Friday 15 March 2019, 16:00-17:00
- MR2, Centre for Mathematical Sciences, Wilberforce Road, Cambridge.
Title to be confirmed
Abstract not available
- Part of Institute of Astronomy Galaxies Discussion Group
- Speaker: Vasily Belokurov (IoA)
- Friday 22 March 2019, 11:30-12:30
- Kavli Large Meeting Room, Kavli Building.
Title to be confirmed
Abstract not available
- Part of Data Intensive Science Seminar Series
- Speaker: Yuang Peng - Pythia
- Thursday 25 April 2019, 13:00-14:30
- Kavli Large Meeting Room, Kavli Building.
Title to be confirmed
Abstract not available
- Part of Institute of Astronomy Galaxies Discussion Group
- Speaker: Alfonso Aragon-Salamanca (Nottingham)
- Friday 26 April 2019, 11:30-12:30
- Kavli Large Meeting Room, Kavli Building.
Title to be confirmed
Abstract not available
- Part of Data Intensive Science Seminar Series
- Speaker: Espen Wold - Spacemaker
- Thursday 23 May 2019, 13:00-14:30
- Kavli Large Meeting Room, Kavli Building.