1/15 are photoz bao surveys competitive? · are photoz bao surveys competitive? 1.what do we lose...

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Are photoz BAO surveys competitive? 1. What do we lose cf specz? 2. What photo-z accuracy can we expect? 3. How well will this detect the wiggles? 4. How much more area is reqd cf spec-z ? 5. How well can the BAO scale be measured? 6. Errors on w? 7. Requirements? Sarah Bridle, UCL & Chris Blake, UBC 1/15

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Page 1: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

Are photoz BAO surveys competitive?

1. What do we lose cf specz?

2. What photo-z accuracy can we expect?

3. How well will this detect the wiggles?

4. How much more area is reqd cf spec-z ?

5. How well can the BAO scale be measured?

6. Errors on w?

7. Requirements?

Sarah Bridle, UCL & Chris Blake, UBC

1/15

Page 2: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

2015

CMB WMAP 2/3 WMAP 6 yr

Planck Planck 4yr

Clusters AMI

SZA

APEX

AMIBA

SPT

ACT

DES

Supernovae

Pan-STARRS

DES LSST

JDEM/SNAP

CFHTLS

CSP

Spectroscopy

ATLAS

SKAFMOS

SDSS

Imaging CFHTLS

ATLAS KIDS JDEM

LSST SKA

SDSS

SUBARU

Surveys to measure Dark Energy

2005

20152005

ESSENCE

XCS

DUNE

2010

2010

WFMOS

DLS

LAMOST

DES, VISTA

Pan-STARRSHyper suprime

2/15

Page 3: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

2015

CMB WMAP 2/3 WMAP 6 yr

Planck Planck 4yr

Clusters AMI

SZA

APEX

AMIBA

SPT

ACT

DES

Supernovae

Pan-STARRS

DES LSST

JDEM/SNAP

CFHTLS

CSP

Spectroscopy

ATLAS

SKAFMOS

SDSS

Imaging CFHTLS

ATLAS KIDS JDEM

LSST SKA

SDSS

SUBARU

Surveys to measure Dark Energy

2005

20152005

ESSENCE

XCS

DUNE

2010

2010

WFMOS

DLS

LAMOST

DES, VISTA

Pan-STARRSHyper suprime

2/15

Page 4: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

1. What do we lose cf specz?

2. What photo-z accuracy can we expect?

3. How well will this detect the wiggles?

4. How much more area is reqd cf spec-z ?

5. How well can the BAO scale be measured?

6. Errors on w?

7. Requirements?

Are photoz BAO surveys competitive?

1/15

Page 5: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

Gla

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3/15

Page 6: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

4/15

Non-linear theory

Page 7: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

4/15

Non-linear theoryPhoto-zs only

Page 8: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

4/15

See Zhan & Knox 2005 for use of red lines to measure H/σz

Non-linear theoryPhoto-zs only

Page 9: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

Glazebrook & Blake 2005

5/15

Page 10: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

Bla

ke &

Bri

dle

ast

ro-p

h/0

4117

13

Increasingphoto-z accuracy

6/15

Page 11: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

1. Is any BAO information available?

2. What photo-z accuracy can we expect?

3. How well will this detect the wiggles?

4. How much more area is reqd cf spec-z ?

5. How well can the BAO scale be measured?

6. Errors on w?

7. Requirements?

Are photoz BAO surveys competitive?

1/15

Page 12: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

DE

S W

hit

epap

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stro

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/051

0346

7/15

griz

Page 13: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

DE

S W

hit

epap

er a

stro

-ph

/051

0346

7/15

σz = σ68/(1+z) ~ 0.03

+ VISTAgriz

Page 14: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

1. Is any BAO information available?

2. What photo-z accuracy can we expect?

3. How well will this detect the wiggles?

4. How much more area is reqd cf spec-z ?

5. How well can the BAO scale be measured?

6. Errors on w?

7. Requirements?

Are photoz BAO surveys competitive?

1/15

Page 15: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

Bla

ke &

Bri

dle

ast

ro-p

h/0

4117

13

Fit a sin wave instead:Model independent.

-amplitude >0?

Following Blake & Glazebrookand Seo & Eisenstein

6/15

Page 16: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

Bla

ke &

Bri

dle

ast

ro-p

h/0

4117

13

8/15

Page 17: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

1. Is any BAO information available?

2. What photo-z accuracy can we expect?

3. How well will this detect the wiggles?

4. How much more area is reqd cf spec-z ?

5. How well can the BAO scale be measured?

6. Errors on w?

7. Requirements?

Are photoz BAO surveys competitive?

1/15

Page 18: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

Bla

ke &

Bri

dle

ast

ro-p

h/0

4117

13

9/15

Page 19: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

1. Is any BAO information available?

2. What photo-z accuracy can we expect?

3. How well will this detect the wiggles?

4. How much more area is reqd cf spec-z ?

5. How well can the BAO scale be measured?

6. Errors on w?

7. Requirements?

Are photoz BAO surveys competitive?

1/15

Page 20: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

Bla

ke &

Bri

dle

ast

ro-p

h/0

4117

13

Fit a sin wave instead:Model independent.

- amplitude >0?- k position = ?

Following Blake & Glazebrookand Seo & Eisenstein

6/15

Page 21: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

Bla

ke &

Bri

dle

ast

ro-p

h/0

4117

13

10/15

Page 22: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

1. Is any BAO information available?

2. What photo-z accuracy can we expect?

3. How well will this detect the wiggles?

4. How much more area is reqd cf spec-z ?

5. How well can the BAO scale be measured?

6. Errors on w?

7. Requirements?

Are photoz BAO surveys competitive?

1/15

Page 23: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

by Chris Blake

11/15

Page 24: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

Glazebrook & Blake 2005

5/15

Page 25: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

by Chris Blake

12/15

Page 26: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

Gla

zeb

roo

k &

Bla

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stro

-ph

/050

5608

Constraints on w(z)

See also Dolney, Jain, Takada 2005

13/15

Page 27: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

Predictions for LSST

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arg

on

iner

200

5

14/15

Page 28: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

1. Is any BAO information available?

2. What photo-z accuracy can we expect?

3. How well will this detect the wiggles?

4. How much more area is reqd cf spec-z ?

5. How well can the BAO scale be measured?

6. Errors on w?

7. Requirements?

Are photoz BAO surveys competitive?

1/15

Page 29: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

Requirements

• Homogeneous photometric calibration– Galactic extinction

– Cirrus

• Representative spectroscopic calibrationsample– VVDS IAB <24 50,000 zs

– WFMOS?!

15/15

Page 30: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

2015

CMB WMAP 2/3 WMAP 6 yr

Planck Planck 4yr

Clusters AMI

SZA

APEX

AMIBA

SPT

ACT

DES

Supernovae

Pan-STARRS

DES LSST

JDEM/SNAP

CFHTLS

CSP

Spectroscopy

ATLAS

SKAFMOS

SDSS

Imaging CFHTLS

ATLAS KIDS

LSST SKA

SDSS

SUBARU

Surveys to measure Dark Energy

2005

20152005

ESSENCE

XCS

DUNE

2010

2010

WFMOS

DLS

LAMOST

DES, VISTA

Pan-STARRSHyper suprime

2/15

JDEM

Page 31: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

2015

CMB WMAP 2/3 WMAP 6 yr

Planck Planck 4yr

Clusters AMI

SZA

APEX

AMIBA

SPT

ACT

DES

Supernovae

Pan-STARRS

DES LSST

JDEM/SNAP

CFHTLS

CSP

ATLAS

SKAFMOS WFMOS

SDSS

Imaging CFHTLS

ATLAS KIDS

DES, VISTA

JDEM

LSST SKA

Pan-STARRS

SUBARU

Surveys to measure Dark Energy

2005

20152005

ESSENCE

XCS

DUNE

2010

2010

Wiggles LSST

SDSSDLS

LAMOST

Hyper suprime

DES, VISTA

Pan-STARRSHyper suprime JDEM

2/15

Page 32: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

4/15

Page 33: 1/15 Are photoz BAO surveys competitive? · Are photoz BAO surveys competitive? 1.What do we lose cf specz? 2.What photo-z accuracy can we expect? 3.How well will this detect the

4/15

See Zhan & Knox 2005 for use of red lines to measure H/σz

Your Surveys Suck. Improve your user surveys

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