Missions In the Coming Decade Moderator: Chryssa Kouveliotou (GWU) Panelists: Jeffrey Kruk (NASA), Randall Smith (CfA), Ira Thorpe (NASA) Introductory Remarks Chryssa Kouveliotou (GWU) Missions of the Coming Decade
• Are there overlaps between ESA-NASA missions and how could these exploited to achieve the best outcome? • Are there synergies between missions and how could these exploited to achieve the best outcome? • Are there obvious gaps in the overall science goals that may need to be filled with e.g., explorer or probe missions? • What are the lessons learned from the US – International collaborations? 2019 2022 2025 2030 2034 EUCLID
ATHENA IXPE WFIRST XRISM LISA LIGO A+
3G Detectors SVOM, SRG, eXTP, GECAM +++….. WFIRST and Euclid
Jeffrey Kruk (NASA) WFIRST Project Scientist
(Euclid information courtesy of Jason Rhodes, Mike Seiffert, Harry Teplitz) EUCLID – M2 Measuring Dark Energy and Dark matter Dark Energy causes accelerated expansion of the Universe Tim This expansion is locked up in: e • The geometry of the universe • Distance (scale) as a function of redshift • Growth of density perturbations • Evolution of structure (“clustering”) as a function of cosmic time
The Euclid mission is optimized for two complementary dark energy probes: Weak Lensing and Galaxy Clustering Requiring: • Shapes and orientations of field galaxies distorted by intervening dark matter due to weak lensing • Photometric redshifts [∆z /(z+1)< 0.05] of the WL galaxies • Spectroscopic redshifts [∆z/(z+1) < 0.001] to trace the galaxy clustering Over a minimum survey area of 15,000 deg2 (36% of the sky)
Springel et al , MPIA Mission and Spacecraft Key Systems ▪ Wide-field telescope with 1.2 diameter primary mirror ▪ High image quality: up to 0.18 arcsec resolution in visual ▪ Low noise attitude control providing extremely stable pointing ▪ K-band telemetry: more than 100 Gbyte/day compressed science data
Mission and operation ▪ Soyuz-Fregat ST-2.1B carrier, ~2150 kg spacecraft mass ▪ Mission nominal lifetime of 6 years + cruise + commissioning ▪ Lissajous orbit around SEL2, with line of sight nearly 90 degrees from Sun, to ensure thermal stability
4k HST: (VIS) WFPC3
ESO 7x7 Euclid Field of View arcmin 42x44 arcmin 609 Mpixels in Visual 67 Mpixels in NIR Euclid Instruments Instruments are provided by the Euclid Consortium (~1500 members in 14 participating countries) VIS instrument
o NISP: Near-IR Spectrometer and Photometer - 0.92 < λ < 2.0 micron NISP instrument 16 (2kx2k) HgCdTe detectors – 0.3” pixels – 0.763°x0.722° 3 Photometric bands Y, J, H Hα Spectroscopy 1.25-1.85 micron, R~360
o VIS: Visual imager - 0.55 < λ < 0.92 micron 36 (4kx4k) CCDs operating at ~150 K – 0.1” pixels – 0.787°x0.709° single bandpass (r+i+z) In combination with telescope, VIS will provide excellent image quality for weak lensing measurement Sensors are optimised for Euclid ▪Teledyne Imaging Systems (USA) for NISP H2RG sensors, NASA contract ▪e2v/Teledyne (UK) for VIS CCDs, ESA contract visual instrument: 609 Mpixel camera Euclid Survey