Friday, 18 May 2012
|
12:00 pm
[order hoagie]
[see hoagie list]
|
Princeton University ~
Gravity Group Astrophysics/Cosmology Lunch
Jadwin 102 (Joe Henry Room)
|
|
Speaker:
|
Beth Reid (Berkeley) |
|
Topic:
|
SDSS-III Baryon Oscillation Spectroscopic Survey DR9 Results: BAOs, the growth of structure, and the Alcock-Pacyznski effect
|
|
Abstract:
|
I will present a measurement of the galaxy correlation function at z=0.57 from the BOSS DR9 sample. The baryon acoustic oscillation feature (BAO) is detected with high significance, and provides the most precise distance constraint ever obtained from a galaxy survey (1.7 percent). Further cosmological tests are available from the relative amplitude of clustering along and perpendicular to the line of sight. The Alcock-Paczynski effect allows a geometric test to measure the product of the angular diameter distance and Hubble expansion rate at the galaxy sample redshift. Peculiar velocities of galaxies also amplify the apparent clustering along the line-of-sight. We demonstrate our ability to distinguish these effects in the data through their scale dependence, and present measurements of both the growth of structure, the angular diameter distance, and the Hubble expansion rate at z=0.57, along with their cosmological implications. |
| |
|
|
Talk Notification
Notifications for JournalClub talks are automatically sent to the
cosmology mailing list.
Ordering a Hoagie
The Friday noon talks are catered by Hoagie Haven.
To be able to order a hoagie, you'll first have to
register for an account.
Then click on the "[order hoagie]" link above next to this week's talk.
You can order multiple hoagies,
in case you're hungry or want one for a guest.
To cancel an order, click
here.
If all else fails, you can email your order to the
hoagie person directly.
Scheduling Information
This semester scheduling is handled by
Sean McWilliams
and Theodor Brasoveanu.
Computer Problems
...are all Mike Nolta's fault.
Cosmology