BDT 17 Nov 08 1

On Roadmapping

BDT 17 Nov 08 2

Astronet

ESO/ESA ESF/Graz

CanadaCNESAustralia

ExoPTF

EP-RATExoplForum08

Decadal Survey

Roadmapping...

ExoPAG

ExNEPs

TOPS

BDT 17 Nov 08 3

ImplementationMono (-pupil -spacecraft) / Multi (-aperture -spacecraft)After RV, transits, continue step by step approach:

Mono pupil and spacecraft + coronagraph● ELTs. Problems: - share with cosmology, RV, etc . - not possible of continuous monitoring ==> only few snapshot spectra● 1.5 – 2 m dedicated space telescope

Multi spacecraft

Mono -pupil● External occulter● Fresnel array

Multi-aperture● Nulling interferometer● Hypertelescope + coronagraph

1993-4: TOPS (NASA)1996: ExNPS (NASA)1997: ESO WG on Exoplanets Origins Roadmap (NASA)2005: Cosmic Vision (ESA) ESA-ESO Report on Exopl.2007: ExoPTF (NASA/NSF)2008: JPL « Community Report » ASTRONET2009: EPRAT (ESA) EXOPAG (NASA) Decadal Survey (US Acad Sci)... ad vitam aeternam ?

51 Peg

HD 209458 transit

CoRoT launch

-->HARPS

BDT 17 Nov 08 4

Mono (-pupil -spacecraft) / Multi (-aperture -spacecraft)After RV, transits, continue step by step approach:

1st step: Mono pupil and spacecraft + coronagraph● ELTs. Problems: - share with cosmology, RV, etc . - not possible of continuous monitoring ==> only few snapshot spectra● 1.5 – 2 m dedicated space telescope

2nd step: Multi spacecraft

Mono -pupil● External occulter● Fresnel array

Multi-aperture● Nulling interferometer● Hypertelescope + coronagraph

Action!

BDT 17 Nov 08 5

Mono (-pupil -spacecraft) / Multi (-aperture -spacecraft)After RV, transits, continue step by step approach:

1st step: Mono pupil and spacecraft + coronagraph● ELTs. Problems: - share with cosmology, RV, etc . - not possible of continuous monitoring ==> only few snapshot spectra● 1.5 – 2 m dedicated space telescope

2nd step: Multi spacecraft

Mono -pupil● External occulter● Fresnel array

Multi-aperture● Nulling interferometer● Hypertelescope + coronagraph

1st detections: done Radius: 1% of planets (trans.) Stats: done (RV)

« Adresses »: underway (RV) Next: Molecules!

BDT 17 Nov 08 6

Mono (-pupil -spacecraft) / Multi (-aperture -spacecraft)After RV, transits, continue step by step approach:

1st step: Mono pupil and spacecraft + coronagraph● ELTs. Problems: - share with cosmology, RV, etc . - not possible of continuous monitoring ==> only few snapshot spectra● 1.5 – 2 m dedicated space telescope

2nd step: Multi spacecraft

Mono -pupil● External occulter● Fresnel array

Multi-aperture● Nulling interferometer● Hypertelescope + coronagraph

1st detections: done Radius: 1% of planets (trans.) Stats: done (RV)

« Adresses »: underway (RV) Next: Molecules!

BDT 17 Nov 08 7

Implementation: a plan we can believe inMono (-pupil -spacecraft) / Multi (-aperture -spacecraft)After RV, transits, continue step by step approach:

Mono pupil + coronagraph● ELTs. Problems: - share with cosmology, RV, etc . - not possible of continuous monitoring ==> only few snapshot spectra● 1.5 – 2 m dedicated space telescope

Multi spacecraft

Mono -pupil- External occulter- Fresnel array

Multi-aperture- Nulling interferometer - Hypertelescope + coronagraph

BDT 17 Nov 08 8

Towards Molecules - Implementation: a plan we can believe in

Mono (-pupil -spacecraft) / Multi (-aperture -spacecraft)After RV, transits, continue step by step approach:

Mono pupil + coronagraph VIS● ELTs. Problems: - share with cosmology, RV, etc . - not possible of continuous monitoring ==> only few snapshot spectra● 1.5 – 2 m dedicated space telescope

Multi spacecraft

Mono -pupil- External occulter- Fresnel array

Multi-aperture- Nulling interferometer - Hypertelescope + coronagraph

Precursor: SPICA

9

Towards Molecules - Implementation: a plan we can believe in

Mono (-pupil -spacecraft) / Multi (-aperture -spacecraft)After RV, transits, continue step by step approach:

Mono pupil + coronagraph VIS● ELTs. Problems: - share with cosmology, RV, etc . - not possible of continuous monitoring ==> only few snapshot spectra● 1.5 – 2 m dedicated space telescope

Multi spacecraft

Mono -pupil- External occulter- Fresnel array

Multi-aperture- Nulling interferometer - Hypertelescope + coronagraph

VIS UV 2 S/C IR 4-5 S/C VIS/IR > 30 S/C

Large (4+ m) monopupil corono.

World-wide coordination needed

BDT 17 Nov 08 10

About Theory● Observation is leading theory

● It is not sufficient to « passively » take spectra of atmopheres.

It is also important to decipher them, i.e. extract a planet model.

Full deciphering codes still to be built

BDT 17 Nov 08 11

Conclusion for BDT● Rapidly technology plan for first step (« Mono »). No

more hesitation

● Sketch of further steps, with no precise roadmapping nor decision yet.

Just prepare generic technologies for all kind of free-flyers

● Methodology:Only a direct open debate between proposers and BDT, EPRAT

can clarify scientific and instrumental issues of different approaches