kegs (kepler extra-galactic survey) brad e. tucker
TRANSCRIPT
KEGS (Kepler Extra-Galactic Survey)
Brad E. Tucker
The KEGS Core Team – The KEGGERS
Brad Tucker
Dan Kasen
Armin Rest Peter Garnavich
Rob Olling Ed Shaya Richard Mushostsky
Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Kepler
Transiting planets around bright stars
105 sq. degree field in Cygnus
~100K targets ( ~3k GO)
1 min + 30 min cadences
Only selected pixels downloaded
Monitored 500 galaxies
Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Supernova with Kepler – The Good
30 Minute light-curve
Continuous monitoring
Pre-Explosion
4000 Data points per SN!
Photometry ~50 - 100 ppm
Olling+ (Nature, in press)Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Supernova with Kepler – The Bad
~4” pixels
Data downloaded 3 months late => SN already happened
Must pre-select which galaxies to monitor/download => Need to predict the future
Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Supernova with Kepler – The Ugly
Systematic Nightmare!
Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
SN with Kepler
6 SN from 2010 - 2012
3 Ia’s (Olling+, Nature, in press)
2 II-P (Tucker+, Nature, in prep)
1 IIn/Ia-csm (Garnavich+, in prep)
Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Type Ia SN with Kepler
Olling+ (Nature, in press)Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Type Ia Supernova Progenitors
Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Detecting the Donor Star
Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
The blue object is the donor star, with the yellow shock wave and front
The donor star interferes with the ejecta from the explosion
After ~3 days the eject fills the hole creating by the donor star (b)
Kasen (2010)
Signs of the Donor Star
Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Most of the interaction is in the ultraviolet
t < ~5 days in B band for a Red Giant shows a significant bump
Optical bands only suffer a slight modification to their light curve rise time
Kasen (2010)
Limits on Progenitors on Ia Progenitors
Olling+ (Nature, in press)Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Kepler Cosmology
Olling+ (Nature, in press)Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Core-Collapse SN
Tucker+ (Nature, in prep)Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Core-Collapse SN
Tucker+ (Nature, in prep)Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Hydrogen Recombination
Helium Recombination
Plateau Phase
Maximum Light
Tucker+ (Nature, in prep)
Core-Collapse SN
Garnavich+ ( in prep)Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
K2 Fields
Kepler 1
Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Campaign 4
~3000 Galaxies
7 February – 24 April 2015
Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Campaign 5
2800 Galaxies
26 April – 11 July 2015
Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Fast and Faint
Image Credit : Mansi Kasliwal
KEGS
Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
Active Galactic Nuclei
Mushotzky+11
~3% of galaxies low level AGN
Sensitivity ~0.01%
Aiming to find 300 – 500 new AGN
QSO’s Too
Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015
KEGS Plan + Goals
2 – 3 Fields per year (Galactic Cap Fields), 3-5K galaxies per field
3 – 10 SN per field, SN Shock break-out + subtle features
Fast, faint transients
AGN, QSO’s
Improving cosmological samples
Need Ground Based Follow-up to type objects
Talk to me if you’re thirsty for data and want some KEGS
Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015