The Transient Universe: AY 250 Spring 2007 Future Observations of SN IA Geoff Bower.

The Transient Universe: AY 250 Spring 2007

Future Observations of SN IA

Geoff Bower


SN Ia

SN 2002hpFrom GOODS


Type Ia Supernovae and Cosmology

Filippenko 2003

H0 = 72 +/- 8 km/s/Mpc

Omega_lambda = 0.7

Omega_m = 0.3


Stretch Correction

• Time dilation correction

• The more luminous the SN, the longer the timescale


Goals of Supernova Searches

• Nearby SNe– Calibrate stretch

relations– Dependence on

environment, SN host– SN rate – Physical

understanding of progenitor(s), events, & calibrations

• Distant SNe– Add points to

magnitude-redshift relation


Two Future Directions


SNAP

• Space mission• 2m telescope• 1 sq deg FOV• Small NIR imager• Spectrometer

– 0.3 – 1.7 microns

• Survey 20 sq degrees

• 2000 SN IA/year– Z = 0.1 – 1.7

• Full light curves– 2 to 80 days

• Tight control of systematics

Perlmutter et al 2004


Separating Cosmological Constant from Quintessence


System Design


Redshift Dependence of Results


Quality of Space-Based PSF

Z=0.83


Space-Based Observations Win Over Ground-Based


Comparison with Other Facilities


LSST

• Ground-based telescope

• 8 meter• 5 colors• Two observing modes

– All sky every 3 days– Staring

• Photo-red shift only– Delta Z ~ 0.01

• 250,000 SN IA/year in all sky– Z <0.8

• 14,000 in Staring mode– Z < 1.4


Wang et al 2005


Summary

• SNAP– Limited number– Small FOV

– Spectroscopy– Control of systematics– No gaps due to

weather

• LSST– Many objects– Whole sky

– Photo-z

– Simultaneous BAO– Hubble constant

measurement

The Transient Universe: AY 250 Spring 2007 Future Observations of SN IA Geoff Bower.

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