University of Minnesota
University of Minnesota

Massive Stars Workshop 2012

University of Minnesota

Minnesota Institute for Astrophysics

Science Program

Monday October 1 - Giant Eruptions and Pre-Supernova Evolution (SN impostors, LBVs, hypergiants and red transients)

Morning Invited Review Talks (9:00am - 12:30 am)

9:00 - 9:15 am Welcome and Introductory Remarks, Dean Steve Crouch and Roberta Humphreys

Chairman -- Kris Davidson

9:15 - 9:50 am LBVs - their variability and formation of nebulae -- Kerstin Weis

9:55 - 10:30am Giant Eruptions (Impostors) -- Schuyler Van Dyk


11:00 - 11:35 am Origin of the Instability -- surface -- Jorick Vink

11:40 - 12:15 pm Origin of the Instability -- interior

Old and New Instabilities in Massive Stars -- David Arnett

topics for the afternoon discussion (2:00 - 5:30pm)

Chairman -- Roberta Humphreys

1. What is the progenitor class of -- of LBVs, of giant eruptions as a function of mass, relations to RSGs, AGBs?

contributed talks 10 min

* Nolan Walborn -- Three LMC LBV's in Current Extended Outbursts

* Armin Rest -- Spectrophotometric Evolution of Eta Carinae's Great Eruption

* K. Davidson -- The Radiative Physics of Opaque Eruptions - a reply to Rest

* Mansi Kasliwal -- Intermediate Luminosity Red Transients

Do high mass loss episodes occur in Pop III?

contributed talk 10 min

* Dominik Bomans -- Massive star transients at low metallicity

* Roberta Humphreys - What's in a Name - LBVs?


2. Recovery from a giant eruption? -- the survivors

contributed talks 10 min

* Kris Davidson -- eta Car from 1890 - present

* Chris Kochanek -- Dust in Massive Star Transits

How does a giant eruption affect future evolution ?

3. Surface vs. Interior instabilities? (in different mass ranges)

Surface -- the Eddington limit in its various forms (opacity, rotation,
the bi-stability jump) and the LBV/S Dor instability strip

Contributed talks 10 min

* Joyce Guzik -- Origin of the LBV Instability

* Noam Soker -- Powering major LBV eruptions by accretion on a companion

Can giant eruptions be explained by surface instabilities?

Interior -- What kind of instabilities occur, can they explain giant eruptions?

Contributed talk 10 min

* Josh Shiode -- Wave-Driven Mass Loss: a Mechanism for Late-Stage

Stellar Eruptions

4. What physics is or still needs to be included in the codes?

Discussion led by Dave Arnett and Norbert Langer

Tuesday October 2 -- Supernovae and Hypernovae -- their progenitors and progeny (Types II's, Ib and Ic, Type IIn's, super luminous SN, and the origin of GRBs)

Morning Invited Review talks (9:00am - 12:15pm)

Chairman - Alexander Heger

9:00 - 9:35 am SN progenitors --- Stephen Smartt

9:40 - 10:15 am Super-luminous SN and Type IIn's --- Nathan Smith


10:50 - 11:25 Failed Supernovae and Pulsational Pair Supernovae --- Stan Woosley

11:30 - 12:10 Gamma-ray bursts --- Andrew Fruchter

Topics for afternoon discussion (1:45 - 5:30pm)

Chairman -- Stephen Smartt

1.What is the fate of the most massive stars > 20Msun, > 60Msun, and > 100Msun?

Contributed talks 10 min

* Schuyler Van Dyk -- Progenitors from pre-SN Imaging

* Nancy Elias-Rosa -- Progenitors of SNe II associated with Yellow Supergiants

* Vikram Dwarkadas -- Are LBVs SNe Progenitors ?

* Selma de Mink -- New insight in the importance of binaries for the
pre-supernova evolution of massive stars

Are all Type IIn's supernovae?

What are the progenitors and origin of Superluminous SNe?

Contributed talk 10 min

* Ori Fox -- Probing the Final Stages of Massive Star Evolution
With Type IIn Supernovae


2. Failed SNe in high mass stars : do they exist ?

Contributed talk 10 min

* Jill Gerke -- A Search for Failed SNe

3. What is the role of the pulsational pair instability?

Contributed talk 10 min

* Ken Chen -- Supernovae from the Most Massive stars

4. What is the role of pre-terminal interior instabilities?

Contributed talk 10 min

* Jeremiah Murphy -- Explosion Conditions and the Effects of
Multi-dimensional Instabilities

Are these related to the non-terminal giant eruptions? (see Day 1)

5. What physics is or still needs to be included in the codes?

Contributed talk 10 min

* Claudio Ugalde -- Future research of 12C(a,g)16O

Discussion led by Dave Arnett and Norbert Langer

Wednesday October 3 - The Aftermath: neutron stars, black holes,and gravity waves

Morning Invited Review Talks (9:00am - 12:15pm)

Chairman -- Vuk Mandic

9:00 - 9:35 am (Massive) Binary Star Evolution -- Norbert Langer

9:40 - 10:15 am Supernova explosions and observable signals -- Th. Janka


10:50 - 11:25 Compact binary mergers & gravity waves -- Richard O'Shaughnessy

11:30 - 12:10 Gravitational Waves from Core-Collapse Supernovae -- Bernhard Mueller

topics for afternoon discussion (1:45 - 4:00pm)

Chairman -- Yong-Zhong Qian

1. How do compact remnants depend on the initial properties of the massive stars?

* Ondrej Pejcha -- Neutron star mass distribution

* Tsing Wai Wong -- Progenitors of Black Holes

2. Explosion mechanisms of core-collapse supernovae and associated GW signals

* Vuk Mandic -- Gravitational Wave Detectors in the Next Decade

* Evan O'Connor -- Core-collapse SN observables and massive star evolution

* Jeremiah Murphy -- A Theory for Gravitational Wave Emission from Core-Collapse SNe

3. What can we learn from GW signals about the physics input -- convection, neutrino emission, nuclear equation of state?

4. What are the prospects for the upcoming second-generation GW detectors to observe these GW signals?