Great Plenary Meeting: PM5 - EWASS Symposium 5 - Session 5
Session Agenda and Talks
To be finalised by 1 June 2012
Fri 6 Jul 2012 |
What |
Who |
Comments |
Symposium S5 - Session 5: |
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14.00-15.30 |
Exoplanets, Astrometry reference frame, quasars, solar system |
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Add your suggested contribution below the line
If you would like to make a presentation during this session please add your name, contact email, talk title, and a brief two line abstract to the table below. Alternatively, you can send an email to great@ast.cam.ac.uk with the same information and we'll add that to this list.
The SOC will review all submissions and suggestions received by Fri 25th May 2012 - and a programme will be composed by Fri 8th June 2012.
Proposed contributions: Symposium S5 - Session 5: |
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Name |
Title |
Short abstract |
Talk or poster?? |
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Sonia Anton |
Jittery Quasars and Offset Galaxies |
Multi-epoch optical observations of a set of selected AGNs revealed photocenter "jitters" at mas level, accompanied by flux density variations. These jitters translate into motions ranging from few parsecs (in most of the objects), to tens of parsec. We present possible origins for such photocenter displacements both in the case of AGNs with jets and those without jets. We discuss the role of Gaia for detecting galaxies harboring binary and kicked black hole systems. |
Talk (moved from S4) |
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Luka C. Popovic et al. |
Photocentric variability of quasars due to variations in their inner structure: consequences for Gaia measurements |
The Gaia mission seems to be very promising, not only for astrometry, but also for exploring the inner structure of AGNs. We study the photocenter position variability caused by variations in the quasar inner structure, considering the variability in the accretion disk emissivity and torus structure variability caused by the different illumination by the central source. Observations of the photocenter variability in two AGNs, SDSS J121855+020002 and SDSS J162011+1724327 have been reported and discussed. |
Talk |
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Mariateresa Crosta |
Relativistic Astrometry for Gaia and beyond |
Advancement in astronomical observations and technical instrumentation implies taking into account the general relativistic effects due the dynamical gravitational fields encountered by the light while propagating from the star to the observer. Therefore, data exploitation for Gaia-like space astrometric mission (ESA, launch 2013) requires a fully relativistic interpretation of the inverse ray-tracing problem, namely the development of a highly accurate astrometric models, in accordance with the geometrical environment affecting light propagation itself and the precepts of the theory of measurement. This could open a new rendition of the stellar distances and proper motions, or even an alternative detection perspective of many subtle relativistic effects suffered by light while it is propagating and subsequently recorded in the physical measurements. |
Talk |
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Alessandro Sozzetti |
The Gaia Astrometric Survey for Giant Planets Around Nearby M Dwarfs |
I will gauge the Gaia potential for astrometrically giant planet detection around the low-mass stellar sample in the solar neighborhood. I will conclude by highlighting some of the important synergies between Gaia high-precision astrometry and other ongoing and planned, indirect and direct planet-finding and (atmospheric) characterization programs, both from the ground and in space, and over a broad range of wavelengths, such as APACHE, HARPS-N, and EChO. |
Talk |
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Richard P. Olenick |
Small Telescope Extrasolar Transit Search |
An observational campaign involving undergraduates was made of the open cluster Dolidze-Dzimseleshvili 9 with an f/1.5 152 mm astrograph for 37 nights in 2011. Lightcurves were obtained for approximately 1900 stars that were extracted and catalogued from the images. A software processing pipeline and SQL were created to provide methods for similar research at other universities. We report on the binaries, variable stars, and transit candidates found. |
Talk |
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Anthony Brown & Carmen Martinez |
Open cluster evolution and the search for the Sun's siblings |
The search for the Sun's origins serves as a focus for gaining a wider understanding of the question of star cluster migration and dissolution in the Milky Way potential. We will describe preliminary results from a project in which we carry out a detailed study of the dynamical evolution of clusters in a sophisticated Galactic potential, containing contributions from the bar, spiral arms, molecular clouds, and disk warps. This will result in a better understanding of the possibilities to use Gaia data to trace back stars to their parent cluster, including the siblings of the Sun. |
Talk (moved from S6) |
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