This semester, we will continue a format for discussing articles organized by Vox Charta: ​http://voxcharta.org/. Astro-ph will start with a short presentation on a recent paper by a presenter, then continue with a discussion of this week's papers. There is no expectation for attendees to read the presented work beforehand.

If you haven't yet, please start an account on that website, indicate your group as "Columbia" and begin voting on articles to discuss on Friday afternoons at noon.

Date	Presenter	Paper	Link
Sept. 28	Jenna	The impact of interactions, bars, bulges, and AGN on star formation efficiency in local massive galaxies	​http://arxiv.org/abs/1209.0476
Oct. 5	Jim	Is the Solar System Stable?	​http://arxiv.org/abs/1209.5996
Oct. 12	Dan D.	Accretion into the Central Cavity of a Circumbinary Disk	​http://arxiv.org/abs/1210.0536
Oct. 19	Jacqueline
Oct. 26	Aleksey	Constraints on Compton Thick Winds From Black Hole Accretion Disks: Can We See the Inner Disk?	​http://arxiv.org/pdf/1210.3029.pdf
Nov. 2
Nov. 9
Nov. 16
Nov. 23
Nov. 30	Jerry	The imminent detection of gravitational waves from massive black-hole binaries with pulsar timing arrays	​http://arxiv.org/abs/1211.4590
Dec. 7	Lia	Galactic Outflows in Absorption and Emission: Near-UV Spectroscopy of Galaxies at 1<z<2	​http://arxiv.org/abs/1209.4903v1