Breakout A: Survey Science, understanding the Milky Way

Location: Sackler Lecture Theatre - the Hoyle Building

Session Coordinators: Sofia Feltzing and Nicholas Walton

Topic Areas

Conclusions from Group A: GREAT Working Group Areas:

Additional points to note

Interface to Gaia - ESA and DPAC

Next Steps



Key Science Themes

Science Questions

How to exploit Gaia

Discussion Points

'Highlight': define requirements of modeling community - update information on what the Gaia catalogue will give - errors etc


(question of how to treat local group galaxies - and the extragalactic story - unresolved galaxies, qso's, AGN variability etc - and the dark matter)

Pre - and post supplementary data

Range of requirements for observational programmes - range of R's for instance - depending on whether one is looking for s process, r process, Fe, Mg, etc etc.

WG - 'Chemical Tagging' as an example science driver (links to Archaeology) - what imaging/ spectroscopy is required. does this need a new instrument.

Mag cuts < 16 and > 16 - issues for follow-up.

small workshop of interested scientists to define specific science case and requirements which flow from that.

'WG' - alerts - SN - how does the followup process work - what sort of response network is required?

Gaia for the extragalactic community

advertise what information Gaia would provide on galaxies - photometry and positions. coverage. use of the SN for cosmology

localisation of the bright end of the QSO luminosity function (which in turn become probes of the ISM).

'WG' on use of Gaia for extragalactic research.

Additional points

many large facilities being planned are closed consortia initiatives (e.g. WFMOS, PanSTARRS, APOGEE)

thus - how to identify the main European level priorities - and look to gain access to the required telescope/ instrumentation.

modeling - dynamics c.f. kinematics

Resolution and S/N required to meet the key science drivers.

tradeoff of all sky coverage vs targeted samples

measurements of tracers of the halo, the disk.

chemical tagging - what resolution is required - 10000? Use of chemical tagging to disentangle components of the galaxy (e.g thin - thick disk).

Gaia - what Teff, Log g, Z will it give - what else is required.

ESO are already indicating that large Gaia related survey programmes would be welcome.

HST had the ground breaking HDF observations - is there something similar that could come out of Gaia - a flagship science question

Contributed material/Discussions

GreatMeetOneGroupA (last edited 2009-04-15 10:19:18 by CarmeJordi)