1. Janie K. Hoormann University of Queensland 23 April 2019
Black Hole Mass Measurements with the Australian Dark Energy Survey (OzDES)
Janie K. Hoormann
University of Queensland
23 April 2019

2. Active Galactic Nuclei
Compact central region of active galaxies
AGN Structure
Supermassive black hole
~ Msun
Accretion Disk
Light days
Broad Line Region (BLR) clouds
Light weeks/months
Narrow Line Region clouds and Dusty Torus
Light years
Credit: Urry and Padovani 1995

3. Δt
R ~ cΔt
Time
Disk Emission R
Time
Cloud Emission

4. Time
Disk Emission
Time
Cloud Emission

5. Time
Disk Emission
Time
Cloud Emission

6. Time
Disk Emission
Time
Cloud Emission

7. Time
Disk Emission
Time
Cloud Emission

8. Time
Disk Emission
Time
Cloud Emission

9. Time
Disk Emission
Time
Cloud Emission

10. Disk Emission Time Cloud Emission Time Δt R ~ cΔt R
Sample light curves from bitbucket.org/nye17/javelin

11. Reverberation Mapping
Calculate BLR radius using time delay between direct emission and ionized emission from BLR
Use the width of the emission line to determine the velocity of the clouds
Assuming black hole and clouds are in virial equilibrium
𝑀= 𝑓 𝑐 τ ∆ 𝑉 2 𝐺

12. The Big RM Questions
Do the extrapolated Radius- Luminosity relationships really hold out to high redshifts?
Secondary black hole mass measurements
AGN as standard candles
If we have black hole mass measurements out to high redshifts what can this tell us about black hole and galaxy evolution?
Credit: Bentz et al ApJ 767:149 Figure 11

13. RM with OzDES Targeting 771 AGN in the 10 DES-SN fields
Weekly observations with DES
Photometry taken with DECam on the 4m Blanco Telescope in Chile
Model the continuum emission from the disk
Monthly observations with OzDES
Spectroscopy using 2dF AAOmega on the AAT at Siding Springs
Model the response of the BLR
Hβ , MgII, CIV emission lines

14. DES J
z = 2.593 C
Hoormann et al 2019, submitted to MNRAS, arXiv:

15. DES J
M = (3.3 ± 1.2) x 109 Mʘ
343 days
Observed Lag = 343 − days
Rest Frame Lag = 95 − days
z = 2.593
~350 days C
Hoormann et al 2019, submitted to MNRAS, arXiv:

16. DES J
z = 1.905
Hoormann et al 2019, submitted to MNRAS, arXiv:

17. DES J
M = (4.4 ± 2.0) x 109 Mʘ
358 days
Rest Frame Lag = 123 − days
Observed Lag = 358 − days
z = 1.905
~350 days
Hoormann et al 2019, submitted to MNRAS, arXiv:

18. Hoormann et al 2019, submitted to MNRAS, arXiv:1902.04206

19. Future of OzDES

20. 46 secure, 151 probable new lags measurements
with Year 5 data!!!!

21. Just look what one more year can do!

22. Summary OzDES is targeting 771 AGN out to z=4
Recovered first 2 lags using the CIV line
Including one at z = 2.593!
Preliminary look at year 5 data shows we should be able to recover almost 200 more!
And there is still data from year 6 to analyse!