WFIRST Infrared Nearby Galaxy Survey Ben Williams (University of - - PowerPoint PPT Presentation
WFIRST Infrared Nearby Galaxy Survey Ben Williams (University of Washington) Nearby Galaxies Are Great for Astrophysics Detailed view and context simultaneously Sensitive to galaxy evolution and cosmology Anchor our knowledge for
Ben Williams (University of Washington)
Williams: WINGS SIT June 2017
HST WFIRST
Photometry Dolphin (Raytheon) Stellar Halos Bell (Mich.), Johnston (Columbia), Bullock (Irvine) Dwarf Satellites Sand (UA), Bullock (Irvine) Small Scale Dark Matter Walker (CMU), Johnston (Columbia) Globular Clusters Seth (Utah) Star Formation Histories Weisz (Berkeley) Dust & ISM Gordon (STScI), Dalcanton (UW) Stellar Evolution Boyer (STScI)
Deputy PI: Dalcanton (U. Wash.)
PI: Williams (U. Wash.)
Postdoc: Khan (U.Wash.)
Raja Guhathakurta (UCSC) Denija Crnojevic (TTU) Marina Rejkuba (ESO) Antonela Monachesi (MPA) Alan McConnachie (HIA) Laura Sales (UCR) Karin Sandstrom (UCSD) Julia Roman-Duval (STScI) Alberto Bolatto (Maryland) Josh Peek (STScI) Jay Anderson (STScI) David Hendel (Columbia) Meredith Durbin (UW) Andrew Graus (Irvine) Tyler Kelley (Irvine) Anna Yu (Irvine) Sol Courtney (Columbia) Amy Secunda (Columbia) Beth Willman (LSST) Phil Rosenfield (CfA) Margaret Meixner (STScI) Leo Girardi (Padova) Nicolas Martin (MPIA) Cliff Johnson (UCSD) Jay Strader (MSU) Robyn Sanderson (Caltech) Adrian Price-Whelan (Columbia) Sergey Koposov (Cambridge) Julio Chaname (Catolica) Jorge Penarrubia (Edinburgh) Coral Rose Wheeler (Caltech)
Representative Ground-Based Representative Space-Based
+
0.9 kpc
WFC3-IR-PID:12298
1.9 kpc
Williams: WINGS SIT June 2017
Disrupted streams - Small-scale dark matter halos. Number, luminosity, shape of streams - Types, timing and orbits of galaxies accreted.
Williams: WINGS SIT June 2017
Reionization Effects WFIRST Limit
Lots of dark, sub-galactic halo satellites predicted
Williams: WINGS SIT June 2017
galaxy assembly and halo formation
information on metallicity
Virgo intracluster globulars
(Williams et al. 2007)
Williams: WFIRST Infrared Nearby Galaxy Survey
Williams: WFIRST Infrared Nearby Galaxy Survey
Huge increase in sampling of short-lived, high-luminosity phases
Williams: WFIRST Infrared Nearby Galaxy Survey Reionization Effects in lowest mass galaxies
Wide Field Coverage Probes Trends with Radius Large Sample Probes Trends with Galaxy Mass. Lowest masses sensitive to reionization.
Andrew Graus, speaking later!
Formation Rate
Williams: WINGS SIT June 2017
Williams: WINGS SIT June 2017
Galaxy Formation Simulations
Image Simulations
Star Catalogs Star Catalogs Contamination PSF fitting: Output Catalogs Age/Metallicity Measurements Structure Measurements HST Imaging Star-Galaxy Separation
Age/Metallicity Measurements
Age/Metallicity Measurements Unresolved Flux
Williams: WINGS SIT June 2017
Williams: WINGS SIT June 2017
Halo populations by Robyn Sanderson
D’Souza & Bell, 2017; from Illustris simulations
Williams: WINGS SIT June 2017
Accreted Mass Time of Accretion
See poster by Sol Courtney
Williams: WINGS SIT June 2017
Also the Galactic halo
poster by Amy Secunda
Background Level Background Level Background Level
Z087 and H158 Colors
[Fe/H]=-1.5 [Fe/H]=-1.0
Williams: WINGS SIT June 2017
See poster by Meredith Durbin
Williams: WINGS SIT June 2017
Williams: WINGS SIT June 2017
7 Field UVIS Mosaic —- One WFIRST 4k x 4k detector
Blair et al. 2014 Williams: WINGS SIT June 2017
7 Field UVIS Mosaic —- One WFIRST 4k x 4k detector
Williams: WINGS SIT June 2017
Williams: WINGS SIT June 2017
Williams: WINGS SIT June 2017
Williams: WINGS SIT June 2017
Williams: WINGS SIT June 2017
Metal-poor RGB Subaru HSC Bell et al. (in prep)
Williams: WINGS SIT June 2017
Williams: WINGS SIT June 2017
Blue = Z087 Red = H158 Backgrouind: CANDELS- based catalogs Stars: Galaxia catalogs
simulations
Stars in a Halo at 5 Mpc
Williams: WINGS SIT June 2017
Blue = Z087 Red = H158 Backgrouind: CANDELS- based catalogs Stars: Galaxia catalogs
simulations
Williams: WINGS SIT June 2017
Blue = Z087 Red = H158 Backgrouind: CANDELS- based catalogs Stars: Galaxia catalogs
simulations
Williams: WINGS SIT June 2017
Blue = Z087 Red = H158 Backgrouind: CANDELS- based catalogs Stars: Galaxia catalogs
simulations
Blue = Z087 Red = H158
Williams: WINGS SIT June 2017
Backgrouind: CANDELS- based catalogs Stars: Galaxia catalogs
simulations
Blue = Z087 Red = H158
Williams: WINGS SIT June 2017
Backgrouind: CANDELS- based catalogs Stars: Galaxia catalogs
simulations
WFIRST
Williams: WINGS SIT June 2017
Blue = Z087 Red = H158 Backgrouind: CANDELS- based catalogs Stars: Galaxia catalogs
simulations
WFIRST Ground
Williams: WINGS SIT June 2017
Blue = Z087 Red = H158 Backgrouind: CANDELS- based catalogs Stars: Galaxia catalogs
simulations
WFIRST Ground Ground
Williams: WINGS SIT June 2017
Blue = Z087 Red = H158 Backgrouind: CANDELS- based catalogs Stars: Galaxia catalogs
simulations
WFIRST Ground Ground WFIRST
Williams: WINGS SIT June 2017
Blue = Z087 Red = H158 Backgrouind: CANDELS- based catalogs Stars: Galaxia catalogs
simulations
WFIRST Ground Ground WFIRST WFIRST
Williams: WINGS SIT June 2017
Blue = Z087 Red = H158 Backgrouind: CANDELS- based catalogs Stars: Galaxia catalogs
simulations
to-end simulations
simulated halos, simulated companions
fitting
possibilities
population recovery) given the trades
Watkins et al. 2015