SPHERE GTO Program S. Desidera On behalf of SPHERE GTO team
Aims Provide an overview of the SPHERE GTO program to have a clear view of what is already on-going GTO targets (for the requested observing mode) protected against duplications in open time proposals Protection of targets on semester-by-semester basis, but conceptually most of GTO is a long-term program List of protected targets publicy available at the time of each call for proposal
SPHERE GTO 260 nights in compensation of the manpower and cash provided by the Consortium to build the instrument Fully organized at Consortium level (no dedicated GTO for each individual member) Main program: Search for planets (NIRSUR): 200 nights Characterization of disks: 20 nights Planets in the visible: 18 nights Other science 10 nights Contingency: 12 nights
NIRSUR Large planet search survey Several hundreds targets, about 300 for P95 (Early GTO) and P95 Mostly aimed at discovery but includes also some characterization observations of already known planetary companions (Long-slit spectroscopy; Halpha imaging) Coordinators: G. Chauvin (IPAG) S. Desidera
NIRSUR Science Goals What s the frequency in giant planets in wide orbit? Does the frequency depend on stellar mass? The architecture of planetary systems (multiplicity, orbits, etc.) Physical characterization of young sub-stellar objects
NIRSUR Observing mode Simultaneous IFS and IRDIS observations IFS in YJ within 0.87 arcsec and IRDIS in H band (dual narrow band filters for methane features) within 5.5 arcsec
NIRSUR sample selection Focused on nearby young stars + a few special objects Mag limit around R<12 Age-dependent distance boundary; merit function based on planet detectability simulations Distance horizon 100 pc a part from Sco-Cen members Exclusion of SB and close VB (sep < 6 arcsec, i.e. within IRDIS FoV) Stellar mass < 3 Msun
Disk program Several observing modes of SPHERE suitable for disk characterization (High-res. imaging in VIS and NIR; incl. narrow-band filters; VIS/NIR polarimetric imaging) 9 objects selected for P95 Young massive disks (HD 100546, HD 142527, SAO 206462, TW Hya) Debris disks: beta Pic, HD 61005, HD 32297, HD 95086, HIP 79977) Coordinator: C. Dominik (Amsterdam)
Planets in reflected light NIRSUR is focused on self-luminous planets. Planets shining by reflected light are significantly fainter Best perspectives for detection: polarimetric imaging using ZIMPOL in the red Few targets suitable (need to be very clos to the Sun) eps Eri, Sirius, alpha Cen A and B selected for P95 Coordinator: H.M. Schmid (ETH)
Other science Additional scientific programs. Limited amount of time in GTO. Important as proof of concept/feasibility (study of individual objects) to trigger open time proposals Several observing modes Coordinator: E. Lagadec (Nice)
Other science programs Low/intermediate-mass evolved stars (Mira) Massive stars (Betelgeuse, R136 cluster) Symbiotic stars: R Aqr Jets (Z Cma; HD 163296) Solar System (Ceres imaging and Titan polarimetry) Microlensing on background stars by Proxima (long-term astrometric monitoring)
Conclusion Many other things to be done in open time Submit your proposals!!!!
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