Study of environment in galaxy surveys
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- Lesley Harrell
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1 Post-doc Days DIFA+INAF(Bo) 5-6 February 2015 Study of environment in galaxy surveys Olga Cucciati Universita' di Bologna - DIFA INAF-Osservatorio Astronomico di Bologna
2 My Gelmini countdown: 1 year and 8 months left
3 Motivation of my Research Known facts The formation and evolution of galaxies and DM halos is driven by MASS and ENVIRONMENT Open problem Galaxy stellar mass DM halo mass How can we link their formation and evolution? What we need to study in detail 1) how does the star formation efficiency evolve and depend on DM halo accretion? 2) which environmental processes, and on which scales, affect the most the star formation efficiency?
4 Impact of environment on galaxy properties along the cosmic time
5 Impact of environment on galaxy properties along the cosmic time Small scales Substructures in galaxy clusters Large scales Groups and clusters detection Density field / LSS
6 Impact of environment on galaxy properties along the cosmic time z<0.5 - galaxy populations - environment - individual galaxies z~1-2 - galaxy populations - environment 2<z<4+ - galaxy populations - environment? Observations at high redshift are limited by instrumental resolution and required observational time
7 Impact of environment on galaxy properties along the cosmic time z~0 z=0.5 z=1 z=1.5 z=2 z>2 Proto-clusters? Cucciati et al in prep Boselli Cucciati et al 2014 Gavazzi Cucciati 2010 (Virgo Cluster, Great Wall ) Cucciati et al. 2010a (VVDS) Spectroscopic redshifts Cucciati et al. 2006, 2014a (VVDS, VIPERS) Cucciati et al. 2014b Lemaux, Cucciati et al 2014 (VUDS) Serendipitous discoveries with spectroscopic redshifts Photometric redshifts
8 Impact of environment on galaxy properties along the cosmic time z~0 z=0.5 z=1 z=1.5 z=2 z>2 Proto-clusters? Cucciati et al in prep Boselli Cucciati et al 2014 Gavazzi Cucciati 2010 (Virgo Cluster, Great Wall ) Cucciati et al. 2010a (VVDS) Spectroscopic redshifts Cucciati et al. 2006, 2014a (VVDS, VIPERS) Cucciati et al. 2014b Lemaux, Cucciati et al 2014 (VUDS) Serendipitous discoveries (usually by Gianni) Photometric redshifts
9 Impact of environment on galaxy properties along the cosmic time z~0 z=0.5 z=1 z=1.5 z=2 z>2 Proto-clusters? Photometric redshifts Spectroscopic redshifts? Cucciati et al in prep Boselli Cucciati et al 2014 Gavazzi Cucciati 2010 (Virgo Cluster, Great Wall ) Cucciati et al. 2010a (VVDS) Spectroscopic redshifts Cucciati et al. 2006, 2014a (VVDS, VIPERS) Cucciati et al. 2014b Lemaux, Cucciati et al 2014 (VUDS) Serendipitous discoveries with spectroscopic redshifts Photometric redshifts
10 Impact of environment on galaxy properties along the cosmic time z~0 z=0.5 z=1 z=1.5 z=2 z>2 Proto-clusters? Euclid surveys: spec-z + Cucciati et al in prep photo-z Boselli Cucciati et al 2014 Gavazzi Cucciati 2010 (Virgo Cluster, Great Wall ) Cucciati et al. 2010a (VVDS) Spectroscopic redshifts Cucciati et al. 2006, 2014a (VVDS, VIPERS) Cucciati et al. 2014b Lemaux, Cucciati et al 2014 (VUDS) Serendipitous discoveries with spectroscopic redshifts Photometric redshifts
11 The Euclid surveys - Wide survey: deg2 - photometric survey: flux limit H=24 - spectroscopic survey: flux limit Hα = 3 x erg cm-2 s-1 - Deep survey: 40 deg2 - photometric survey: flux limit H=26 - spectroscopic survey: flux limit Hα = 5 x erg cm-2 s-1 Photometric redshift measurement error: σ=0.05 (1+z) Spectroscopic redshift measurement error: σ=0.001 (1+z)
12 The Euclid surveys (results obtained with mock galaxy catalogues) Cucciati et al, in prep
13 The Euclid Deep Survey: photometric and spectroscopic redshifts z cos+pec Cucciati et al, in prep
14 The Euclid Deep Survey: photometric and spectroscopic redshifts z cos+pec z phot (0.05) Cucciati et al, in prep
15 The Euclid Deep Survey: photometric and spectroscopic redshifts z cos+pec z phot (0.05) z phot (0.01) Cucciati et al, in prep
16 The Euclid Deep Survey: photometric and spectroscopic redshifts z cos+pec z phot (0.05) z phot (0.01) Cucciati et al, in prep
17 The Euclid Deep Survey: photometric and spectroscopic redshifts z cos+pec z phot (0.05) z phot (0.01) z spec Cucciati et al, in prep
18 The Euclid Deep Survey: photometric and spectroscopic redshifts z cos+pec z phot (0.05) z phot (0.01) z spec Cucciati et al, in prep z phot+spec
19 The Euclid Deep Survey: the density field z cos+pec z phot (0.05) Density field computed in cylinders +/-1000 km/s length 1,2, Mpc/h Radius Cucciati et al, in prep
20 The Euclid Deep Survey: the density field z cos+pec z phot (0.05) density percentiles Density field computed in cylinders +/-1000 km/s length 1,2, Mpc/h Radius density percentiles Cucciati et al, in prep
21 The Euclid Deep Survey: the density field z cos+pec z phot (0.05) Density field computed in cylinders +/-1000 km/s length 1,2, Mpc/h Radius density percentiles Ideal case density percentiles Cucciati et al, in prep
22 The Euclid Deep Survey: the density field z cos+pec z phot (0.05) density percentiles Density field computed in cylinders +/-1000 km/s length 1,2, Mpc/h Radius density percentiles Cucciati et al, in prep
23 The Euclid Deep Survey: the density field z cos+pec z phot + spec density percentiles Density field computed in cylinders +/-1000 km/s length 1,2, Mpc/h Radius density percentiles Cucciati et al, in prep
24 Applications within Euclid - Environment parameterization to study galaxy evolution Galaxies and AGNs Evolution Science Working Group - Cluster detection: no, thanks... but it can be useful to help other algorithms (Fabio, Mauro) Cluster of Galaxies Science Working Group Galaxy Clusters Work Package within OU-LE3 (leader of PF to find precise cluster redshift) - Clustering: improve clustering estimate of photo-z both galaxy clustering and cluster clustering (Federico, Alfonso) Galaxy Clustering Science Working Group
25 My involvement within Euclid - Environment parameterization to study galaxy evolution Galaxies and AGNs Evolution Science Working Group - Cluster detection: no, thanks... but it can be useful to help other algorithms (Fabio, Mauro) Cluster of Galaxies Science Working Group Galaxy Clusters Work Package within OU-LE3 (leader of PF to find precise cluster redshift) - Clustering: improve clustering estimate of photo-z both galaxy clustering and cluster clustering (Federico, Alfonso) Galaxy Clustering Science Working Group - Things related to galaxy surveys Data Validation WP (including some statistics like LF, GSMF...) Selection Function WP
26 My involvement in galaxy surveys (with Sandro, Paolo, Gianni, Federico, Michele, Eros, Marcella, Lauro, Elena, Micol, Lucia, Marco, Andrea, Margherita, Veronica, Iary...) - VVDS: finished! redshift measurement, density field, groups detection, selection function, FUV-LF - zcosmos: finished! redshift measurement, SFR-density relation - VUDS: observations done, redshift measurement done, data exploitation on going redshift measurement, work on Gianni's proto-clusters - VIPERS: observations done, redshift measurement on-going, data exploitation on going masks preparation, redshift measurement, density field - VANDELS: observations on-going, redshift measurement on-going masks and OBs preparation
27 My involvement in galaxy surveys (with Sandro, Paolo, Gianni, Federico, Michele, Eros, Marcella, Lauro, Elena, Micol, Lucia, Marco, Andrea, Margherita, Veronica, Iary...) - VVDS: finished! redshift measurement, density field, groups detection, selection function, FUV-LF - zcosmos: finished! redshift measurement, SFR-density relation - VUDS: observations done, redshift measurement done, data exploitation on going redshift measurement, work on Gianni's proto-clusters - VIPERS: observations done, redshift measurement on-going, data exploitation on going masks preparation, redshift measurement, density field - VANDELS: observations on-going, redshift measurement on-going masks and OBs preparation
28 Thank you
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