Found 45 talks archived in Planetary systems

Video
Thursday January 26, 2017
Prof. Eric Gaidos
IfA - Hawaii

Abstract

Time is one of the least explored dimensions of exoplanet research; most 
stars targeted by large surveys are middle-aged by necessity or statistics.
Yet the first few hundred million years of a planetary system are probably
the most formative and include accretion, migration, and escape of atmospheres.
While the Kepler prime field included a small number of young stars by chance, the
K2 mission is deliberately selecting some target stars by age, and previews the
potential of TESS and PLATO. The Zodical Exoplanets in Time (ZEIT) project studies
K2 systems in stellar clusters of established ages. Transiting planets as small as
Earth-size have been detected in the Upper Scorpius, Pleiades, Hyades, and Praesepe
clusters. Mysterious aperiodic signals related to circumstellar disks were found in
Upper Scorpius, these may be related to planet formation. We are also investigating
planets around evolved stars and report a Jupiter-mass planet inflated by irradiation
from its host star. Gaia distances, proper motions, and spectra can identify large numbers
of young stars for observation by the TESS and PLATO missions, enabling robust comparisons
across a range of ages to understand evolutionary trends, and select propitious targets for
follow-up by ELTs and space observatories such as JWST.

Video
Tuesday November 29, 2016
Dr. Pedro Figueira
Centro de Astrofísica da Universidade do Porto

Abstract

As of today, we know now more than 3000 planets orbiting other stars. The detection of planets through radial velocity gathers special attention in the world of exoplanet characterization, as this technique will probably allow us to detect and characterize the first Earth-mass planet inside the habitable zone of a neighbouring star. In this talk I will discuss the ongoing efforts for developing state-of-the art spectrographs that permit the detection of an Earth twin, and discuss one of the most formidable obstacles to the detection of planetary signals: stellar activity. While for several years planetary surveys simply avoided active stars, today we know that the presence of extrasolar planets around a star might suppress stellar activity as we measure it, or even boost it. I will present the current view of the intricate relationship between exoplanets and activity, and discuss some of the latest works on the topic.


Video
Tuesday November 8, 2016
Dr. Alejandro Cardesín
European Space Astronomy Centre, Spain

Abstract

Series: XXVIII Canary Islands Winter School of Astrophysics: Solar System Exploration

Topic: Exploration of the Solar System by the European Space Agency

Lecture 2: European exploration of Mars

In this second talk Dr. Cardesín reviews the ESA program for Mars exploration, describing the Mars Express mission and its scientific goals, as well as the ExoMars mission and its current status. 


Video
Tuesday November 8, 2016
Dr. Michael Küppers
European Space Astronomy Centre, Spain

Abstract

Series: XXVIII Canary Islands Winter School of Astrophysics: Solar System Exploration

Topic: Cometary Science and the Rosetta Mission.

Lecture 2: Rosetta, a voyage to a comet and to our origins.

In this second talk, Dr. Küppers gives an overview of the Rosetta mission, from its launch in 2004 until the end of the mission, in September 2016, only a month before the celebration of this Winter School. The talk includes information on the instruments on-board the spacecraft, the two fly-byes to asteroids Steins and Lutetia, and the results obtained from the observations of comet 67P/C-G. 


Video
Tuesday November 8, 2016
Dr. Karri Muinonen
University of Helsinki, Finland

Abstract

Series: XXVIII Canary Islands Winter School of Astrophysics: Solar System Exploration

Topic: Physical Properties of Asteroid Surfaces

Lecture 2: Novel spectrometric modeling

In his second talk, Dr. Muinonen focuses on multiple scattering, describing in detail processes such as the radiative transfer and coherent backscattering (RT-CB), particular cases with incoherent fields, and radiative transfer with reciprocal transactions (R2T2). He also presents very preliminar and recent results obtained by his team at the University of Finland on incoherent backscattering experimetns on millions of spherical particles. In this talk he also revisits space weathering in the context of radiative transfer theory and presents some experiments carried out with olivine.  


Video
Tuesday November 8, 2016
Dr. Sebastien Lebonnois
Laboratoire de Meteorologie Dynamique, France

Abstract

Series: XXVIII Canary Islands Winter School of Astrophysics: Solar System Exploration

Topic: Planetary Atmospheres.

Lecture 2: Radiative transfer, composition, and clouds. 

In his second lecture Dr. Lebonnois talks about the processes that take place in the atmosphere of the planets, explaining the energy balance between the different layers, and the interaction with the surface. The generation of spectral lines and bands, the creation of clouds, and the characteristics of temperature profiles are also described with detail. 


Video
Monday November 7, 2016
Dr. Michael Küppers
European Space Astronomy Centre, Spain

Abstract

Series: XXVIII Canary Islands Winter School of Astrophysics: Solar System Exploration

Topic: Cometary Science and the Rosetta Mission.

Lecture 1: Comets and the Rosetta mission. 

Dr. Küppers gives a general overview on comets in the context of the formation of the Solar System, describing their physical, dynamical, and compositional properties. The speaker describes cometary missions that have been sent before the Rosetta mission and lists some of the most important cometary science questions that are still unsolved or under debated.


Video
Monday November 7, 2016
Dr. Karri Muinonen
University of Helsinki, Finland

Abstract

Series: XXVIII Canary Islands Winter School of Astrophysics: Solar System Exploration

Topic: Physical Properties of Asteroid Surfaces

Lecture 1: Introduction to asteroid UV-VIS-NIR spectrometry

In this first talk, Dr. Muinonen gives an introduction to polarimetry, photometry, and spectropolarimetry techniques and their application to the study of asteroid surfaces. The talk includes a description of the Shkuratov radiative transfer model and the use of Monte Carlo simulations to model radiative transfer for meteorite spectra. 


Video
Monday November 7, 2016
Dr. John Stansberry
Space Telescope Science Institute, USA

Abstract

Series: XXVIII Canary Islands Winter School of Astrophysics: Solar System Exploration

Topic: Exploring the Outer Solar System

Lecture 1: TNOs: a brief history, dynamical structure, and characteristics of its inhabitants

This first talk is devoted to provide an overview of the current state of the population of minor bodies beyond the orbit of Neptune. A review of the discovery history is given, as well as a description of the physical, compositionsl, and dynamical properties of trans-Neptunian objects (TNOs), Pluto, and the Kuiper belt in general.


Video
Monday November 7, 2016
Dr. Sebastien Lebonnois
Laboratoire de Meteorologie Dynamique, France

Abstract

Series: XXVIII Canary Islands Winter School of Astrophysics: Solar System Exploration

Topic: Planetary Atmospheres.

Lecture 1: Overview of planetary atmospheres in the Solar System. 

In this lecture Dr. Lebonnois talks about the large diversity of objects that populate our Solar System, gives an overview on the different types of atmospheres that can be found, as well as the atmospheric structures, and ends with an update on the current exploration of planetary atmospheres.