Agenda PRIMA AOS CDR Science Day, October 1st 2004

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Agenda - PRIMA AOS CDR
Science Day, October 1st 2004 0830 - 0845
Setting the objectives of the day
(RL)
Session 1 Continuation PAOS activities 0845
- 0915 Target and reference star selection
criteria (JS)
Session 2 Rationale,
definition, and tasks of the Science Team 0915 -
0945 Introduction Rationale for a Science
Team (DQ) 0945 -
1000 Recall of ESO Science Proposal and GTO
time allocation (RL) 1000 - 1030 Tasks
and duties of the Science Team Internal MoU
(RL all) Session 3
Reports on current Science Team activities 1045
- 1100 Overview on current science team
activities (RL)
1100 - 1120 Preparatory science

(RLSRDS) 1120 - 1140
Current status of target and reference star
selection (SRSHJSDS)
1140 - 1200 Spectroscopic information from
CORALIE and HARPS (DS) 1200 - 1300
Lunch 1300 - 1400 Closed session on
contractual matters
(PIs, Management board, ESO) 1400 - 1430
Preparatory observing programs and data access
(JS)
Session 4 Future Science Team
activities 1430 - 1515 GTO program definition
and preparations
(RL all)
Session 5 Other business 1515 - 1600 Support
to ESO, Observations, Post-docs at Paranal
(DQ, RL all)
Science data handling, 1600
Summary of PAOS CDR
(FPEJB)
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Objectives of the Day
PRIMA AOS CDR Science Day, October 1st 2004

• Continuation PAOS activities Target and
  reference star selection criteria
• Finish (sign) agreements with ESO
• Sign the internal MoU on science activities, data
  rights, and publication policy (closed session)
• PRIMA Astrometric Planet Search Science Team
• Rationale for a Science team
• Agree on composition of and duties of the Science
  Team
• Report on current science team activities (in
  preparation of the astrometric planet search
  program)

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Recall of the ESO Sience ProposalAstrometric
Survey for Extra-Solar Planets with PRIMA

• Proposal contribute to the development of the
  PRIMA hard- and software to enable an early start
  of high-precision astrometric observations at the
  10µarcsec level.
• Receive guaranteed observing time with the
  VLTI (2 ATs) to conduct a
• large astrometric survey for extra-solar
  planets.
• Scientific Goals
• Resolve the sini uncertainty from planet
  masses. Fundamental for the planetary mass
  function, in particular the upper mass cut-off.
• Confirmation of hints for long-period
  planets in RV surveys.
• Inventory of planets around stars of
  different masses and ages, in particular stars
  that are not accessible to the RV method
  (Mgt1.2Msun and young stars).
• Detection of multiple systems with masses
  decreasing
  from the inside out.
  (Different detection biases RV
• 
  
  Astrometry
• Measure whether multiple systems are
  coplanar or not.
• Scientific Program
• Core Program 1 Accurate measurement of the
  mass of extrasolar planets detected by RV surveys
• Core Program 2 Planet search through the main
  sequence and time
• Observing Time P1 50 stars, 70-100 nights
  P2 100 stars, 100-150 nights

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Astrometric Survey for Extra-Solar Planets with
PRIMAGTO time allocation

• Guaranteed observing time granted to the
  Consortium
• 217 observing nights in total on the two ATs
  in the PRIMA astrometric mode during a period of
  8 years after commissioning of the PRIMA DDLs
• (Conditional upon successful commissioning in
  Chile. 125 nights from DDL 92 nights from AOS
  agreement)
• Astrometry Commissioning and Provisional
  Acceptance in Chile Feb. June 2007
• GTO program
  July 2007
  June 2010
• Time allocation is subject to a detailed and
  comprehensive observing programme, submitted by
  the Consortium and reviewed by the OPC on a
  yearly basis.
• Results will become public one year after the end
  of the 3-year GTO program, but
  targets will not be blocked for more than the
  first year.
• VISA guaranteed time allocations should not
  allow one group to monopolize one of the
  important scientific goals of the VLTI
• For the follow-up of planetary systems detected
  by the radial velocity technique through the
  guaranteed time of HARPS, the Consortium shall
  observe only identified objects with their radial
  velocity curves already in the public domain.

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Memorandum of Understanding on science
activities, data rights, and publication policy
in the PRIMA-DDL astrometric planet search
consortium

• General
• ?Consortium-internal agreement on science
  activities, data rights, and publication policy.
• The rules apply for the duration of the
  PRIMA-DDL/AOS project
• AND the
• execution and exploitation of the GTO
  astrometric planet search program.
• ?The consortium partners agree to seek an
  equal balance in efforts and contributions to the
  PRIMA-DDL/AOS Project as well as to the
  preparation and execution of the GTO Astrometric
  Planet Search Program.
• Science activities Clear distinction
  between
• PRIMA-DDL/AOS Project
  Scientific GTO Planet Search Program
• 
  (set up by
  the consortium/PIs)

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Memorandum of Understanding on science
activities, data rights, and publication policy
in the PRIMA-DDL astrometric planet search
consortium

• Data Rights
• ?All data collected in the preparatory
  observing program are the common property of the
  Science Team. In addition, the partners agree to
  provide on best effort basis any useful
  information on target and reference stars
  available to them from their own resources.
• ?All data obtained as part of the GTO program
  are the common property of the three PIs.
• Publication policy Authors
• ?DDL/AOS Project Consortium
  (part or all, always include PIs)
• ?GTO preparatory program Science Team
• ?GTO Planet Search Program First paper All
  (Consortium and Science Team)
• 
  Other papers Science Team

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PRIMA Astrometric Planet Search Science Team

• Initial Core Science Team
• CH NL
  D
• D. Queloz A. Quirrenbach
  Th. Henning
• D. Segransan S. Reiffert
  R. Launhardt (Coordinator)
• F. Pepe ????
  J. Setiawan
• Final Science Team
• Will be formed later by expanding Core Science
  Team
• Maximum of 15 members
• PIs appoint members
• Composition shall reflect share of partners in
  the project
• Scientists from outside the consortium
  institutions can be appointed

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Tasks and Duties of the Science Team

• Follow new scientific developments in the field
  to accordingly adjust the scientific goals and
  targets of the astrometric planet search program
• Undertake all necessary scientific preparations
  for the GTO program (including building up a
  target data base and carry out preparatory
  observations)
• Plan and carry out the GTO program.

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Current Science Team activities - Overview

• Study/model sources of astrometric
  uncertainties/noise, simulate astrometric
  observations
• Pre-selection and characterization of target and
  reference stars for the astrometric planet search
  program ?
  Report by SR/SH, JS, DS
• Checking CORALIE and HARPS data bases (and
  consortia) for useful information on potential
  target stars ? Report by Damien
• Preparatory observations ? Report by Johny
• Setting up target data base ? Report by Johny
• Refine target groups and science goals ? Start
  discussion

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Current Science Team activities Overview
Pre-selection and characterization of target and
reference for the
astrometric planet search program

• RV planet host stars ? Geneva
  (Damien)
• M, K dwarfs ? Leiden
  (Sabine)
• G, F, A dwarfs, PMS stars ? HD (Johny, Ralf)
• Target Data Base ? HD (Johny)

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Current Science Team activities
OverviewStudy/model sources of astrometric
uncertainties/noise, simulate astrometric
observations

• To refine target and reference star selection
  criteria, define preparatory observing needs and
  strategy, and prepare astrometric observing
  startegy
• Collect results in living internal working
  document Characterization of target and
  reference stars for extrasolar planet searches
  with PRIMA
• ? Sources of astrometric uncertainties
• e.g. Perspective acceleration,
  Pulsations ? Sabine
• Companions, Chromospheric Activity,
  Circumstellar Disks ? Ralf
• ? Parameters of target and reference
  stars that have to be known
• ? Preparatory Observing Strategy
• Publish particular results if study is completed

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Stellar, substellar, and planetary companions

• Most siutable and likely reference stars K
  giants at 1-2 kpc
• Binarity of K stars 40
• Average mass ratio 0.7
• ? Of order one third of all potential reference
  stars will have companions which produce a
  relevant astrometric singal
• ? Clever RV survey necessary!

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Rotational modulation due to starspots

• Chromospheric inhomogenities (e.g., spots) on
  the rotating stellar surface produce astrometric,
  radial velocity, and photometric signals.
• We have modeled the effects for simple edge-on
  (sini1) geometry and a single spot, using
  realistic stellar parameters, spot temperatures,
  and limb darkening coefficients.
• The effects are much smaller at K-band
  (PRIMA_at_VLTI) than V-band (SIM).
• The simulations show that for ground-based
  differential astrometry at K-band and 10µarcs
  accuracy, spots are of concern only for the most
  nearby target and reference stars (typically
  distant K giants).
• Starspots appear to be of serious concern for
  SIM, especially for astrometric grid stars.

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Future Science Team activities

• Continue study/model sources of astrometric
  uncertainties/noise, simulate astrometric
  observations, and preparatory observing strategy
• Investigate how many/which RV planet host stars
  we can/will observe with PRIMA
• ? What kind of long-term RV trends do we
  follow? (3 yr GTO!)
• ? Reasonable prognosis of number published
  RV planets until 2007
• Discuss primary science goals of core program 2
• ? Observe everything?
• ? M dwarfs? (Lack of gas giants? Neptunes?
  Lower host star / disk mass cut-off?)
• ? Solar type dwarfs (Systems with stable
  nishes in habitable zone? Preparation for
  darwin)
• ? More massive (gt1.2Msun) MS stars? (not
  accessible to RV)
• ? PMS stars (young systems, migration, many
  Jupiters? not accessible to RV)

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Future Science Team activities

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