Program

Goal: Examine the evidence for episodic accretion in the embedded and disk phases of protostellar evolution. Consider the consequences of episodicity for envelope chemistry, disk evolution, variability, and stellar properties. Include skepticism.

All talks are 20 min plus 10 min for discussion unless noted otherwise

May 13 AM (08:45-12:30)

08:45-09:00 Welcoming Remarks Neal Evans, Ewine van Dishoeck

The Idea

09:00-09:30 Lee Hartmann: Historical perspective and recent results [pdf]

Embedded Phases

09:30-10:00 Paolo Padoan: Model Predictions of variability from cluster simulations [pdf]

10:00-10:30 Eduard Vorobyov: Predictions from disk instabilities [ppt,pdf]

10:30-11:00 Coffee/Tea Break

11:00-11:30 Doug Johnstone: Observing variability at submillimeter wavelengths [pptx,pdf]

11:30-12:00 Tom Megeath: Observations of variability in far-infrared [pdf]

12:00-12:30 Mike Dunham: What does the protostellar luminosity distribution tell us about the accretion process? [pptx,pdf]

12:30-14:00 Lunch and free discussion

May 13 PM (14:00-17:30)

Evidence from Outflows

14:00-14:30 Hector Arce: Episodic Outflows [pdf]

Evidence from Chemistry

14:30-15:00 Ruud Visser: Chemical models with episodic accretion [pdf]

15:00-15:30 Jeong-Eun Lee: Chemical effects on ices [pptx,pdf]

15:30-16:00 Coffee/Tea break

16:00-16:30 Jes Joergensen: Observations of effects on chemistry [pdf]

16:30-17:00 Comments by the skeptic: Jonathan Rawlings [ppt,pdf], Ewine [ppt,pdf], Markus Schmalzl [pdf]

17:00-17:30 Discussion and future prospects (All)

May 14 AM (09:00-12:30)

Disks in Embedded Phase

09:00-09:30 John Tobin: Evidence for Disks in Embedded Phase [odp]

09:30-09:45 Nadia Murillo: Disks in embedded phases (10+5 min) [pdf]

09:45-10:00 Daniel Harsono: Disks in embedded phases (10+5 min) [pdf]

10:00-10:15 Joe Mottram: Infall rates from observations (10+5 min) [pptx,pdf]

10:15-10:30 Comments from the Skeptics

10:30-11:00 Coffee/Tea Break

Transitional phase

11:00-11:30 Gilles Chabrier: Disk formation in MHD [key,pdf]

11:30-12:00 Aaron Boley: Forming planets in embedded phases [pdf]

12:00-12:30 Zhaohuan Zhu: Disk instabilities [pptx,pdf]

12:30-14:00 Lunch and free discussion

May 14 PM (14:00-17:30)

Disk phase

14:00-14:30 Greg Herczeg: Observational measurements of accretion rates and ages [pdf]

14:30-15:00 Marc Audard: High-energy aspects of episodic accretion [pdf]

15:30-16:00 Coffee/Tea break

16:00-16:30 Luisa Rebull: Evidence on variability from YSOVAR [pptx,pdf]

16:30-17:30 Discussion and Future Prospects (All)

May 15 AM (9:00-12:30)

Effects on Disk Chemistry

09:00-09:30 Simon Bruderer: Chemical modelling of protoplanetary disks [key,pdf]

Effects on Stars

09:30-10:00 Joel Green: FUOr observations [pptx,pdf]

10:00-10:30 Agnes Kospal: EXors [key,pdf]

10:30-11:00 Coffee/Tea Break

11:00-11:30 Isabelle Baraffe: Effects on Stellar Ages [pdf]

11:30-12:00 Comments from the Skeptic: Lee Hartmann/Greg Herczeg

12:00-12:30 Discussion

12:30-14:00 Lunch and free discussion

May 15 PM (14:00-15:00)

Discussion (All)

Do we have a paradigm?

What directions to go?

20:00 Public Lecture by Neal Evans: Life in the Universe