The formation of binary stars

final programme



Monday April 10, 2000


07.45 - 17.15

Registration at conference venue (GFZ, Haus H)



09.00 - 09.10

Welcome (AIP)

Hasinger

09.10 - 09.20

Welcome (MWFK)

Kleinhans


09.20 - 09.50

Introduction (milestones)

Zinnecker

09.50 - 10.30

Single vs. binary star formation


Shu

10.30 - 11.00

Coffee break




Theoretical Context / The Big Picture



11.00 - 11.15

Special invited talk: 50 years ago....

Lüst

11.15 - 11.55

Fragmentation: Wide binaries

Bodenheimer

11.55 - 12.35

Fragmentation: Close binaries

Bonnell (Bate)

12.35 - 13.15

Cloud-cloud collisions

Whitworth

13.15 - 13.30

Fission


Tohline (Durisen)

13.30 - 15.00

Lunch break




Main-Sequence Binary Statistics



15.00 - 15.40

Lower main sequence (GK):

Mayor et al.

15.40 - 16.20

Upper main sequence (OB):

Preibisch et al.

16.20 - 16.50

Contributed talks:

1) Population II binaries

2) Wolf-Rayet binaries


 

Latham

Hidayat

16.50 - 17.20

Coffee break



17.20 - 17.40

Higher multiplicities

Tokovinin

17.40 - 18.20

Binary brown dwarfs

Martin (Basri)

18.20 - 19.00

Constraints from binary statistics on star formation


Larson

19.00 - 21.00 Reception at the Great Refractor (Freibier!)


Tuesday, April 11, 2000



Initial Conditions for Binary Formation and Protobinary Systems



09.00 - 09.40

Structure of molecular cloud cores

Fuller

09.40 - 09.50

Featured object: CB 230 globule

Launhardt

09.50 - 10.30

Turbulence and cloud angular momentum

Burkert

10.30 - 10:40

Featured object: L1551 IRS5

Torrelles

10:40 - 11.20

Observations of protobinaries


Mundy

11.20 - 11.50

Coffee break




Pre-Main Sequence Binary Populations



11.50 - 12.40

T associations and OB associations

Köhler/Brandner

12.40 - 13.10

Herbig Ae/Be stars

Bouvier

13.10 - 13.30

Spectroscopic and photometric surveys

Guenther/Joergens




13.30 - 15.00

Lunch break




Binary Populations in Young Clusters



15.00 - 15.40

The Orion Trapezium cluster

McCaughrean

15.40 - 16.30

Other young clusters (AO/speckle)

Duchene/Patience

16.30 - 17.00

Spectroscopic binaries in young clusters


Mermilliod

17.00 - 17.40

Coffee break



17.40 - 18.20

Evolution of binary populations in young clusters

Kroupa

18.20 - 19.00

Constraints from pre-main sequence binary populations on binary formation


Ghez

Public Talk at the Auditorium Maximum of the Universität Potsdam
20.00 - 21.00 Extrasolar Planets - looking for new worlds Michel Mayor



Wednesday, April 12, 2000



Environments of Young Binaries - Direct Imaging



09.00 - 09.40

Pre-Main-Sequence millimeter interferometry

Dutrey

09.40 - 09.50

Featured object: GG Tau (mm)

Guilloteau

09.50 - 10.40

HST optical/NIR imaging

Stapelfeldt / Menard

10.40 - 10.50

Featured object: GG Tau (HST vs. AO)

McCabe




10.50 - 11.30

Coffee break



11.30 - 11.40

Featured object: L1551-IRS5 binary jets

Itoh

11.40 - 12.20

Jets from young binaries

Reipurth

12.20 - 12.30

Featured object: T Tau

Herbst

12:30 - 13:10

Infrared companions

Koresko / Leinert

13.10 - 13.20

Featured object: Z CMa

Garcia

13.20 - 13.30

Lunar occultation triples

Richichi




13.30 - 15.00

Lunch break



14.30 - 15:00

New IAU Concepts of binary/multiple star designations Dickel / Malkov



Environments of Young Binaries - Indirect Observations



15.00 - 15.40

Unresolved mm observations

Jensen

15.40 - 16.20

Resolved polarimetry: aligned disks?

Wolf et al.

16.20 - 16.30

Featured objeckt: V 824 Ara: aligned spins?


Strassmeier

16.30 - 17.00

Coffee break



17.00 - 17.40

Spectral accretion signatures

Prato / Monin

17.40 - 18.00

WTTS/CTTS pairs – HST results

Hartigan

18.00 - 18.40

Optical/IR SEDs

White

18.40 - 18.50

Featured object: AK Sco

Jensen


Thursday, April 13, 2000


09.00 - 09.40

What do observations of young binary environments tell us about binary formation?


Clarke


Theoretical context - detailed calculations



09.40 - 10.20

Fragmentation and star formation in turbulent cores

Klein

10.20 - 11.00

Fragmentation - the relevance of magnetic fields


Boss

11.00 - 11.40

Coffee break



11.40 - 12.20

Circumstellar disk fragmentation/close binaries

Durisen

12.20 - 13.00

Filament fragmentation/wide and close binaries

Inutsuka

13.00 - 13.20

Contributed talk: angular momentum transfer

Tomisaka

13.20 - 13.30

Contributed talk: angular momentum transfer


Rüdiger

13.30 - 14.30

Lunch break




Free afternoon (Potsdam guided bus tour)




Planet formation and their stability in binary systems

(Session held in Hotel Mercure)



20.00 - 20.30

Planet formation in binary vs. single stellar systems

Lin

20.30 - 21.00

Stability of planets in young binaries

Holman

21.00 - 21.30

Distinguishing planetary and binary systems

Mazeh

21.30 - 22.00

Prospects for life in binary systems, panel

Black





Friday, April 14, 2000



Evolution of young binary systems



09.00 - 09.10

Featured object DQ Tau

Stassun

09.10 - 09.50

Disk evolution - accretion

Mathieu

09.50 - 10.30

Accretion and the properties of protobinary systems

Bate

10.30 - 11.10

Early orbital evolution

Artymowicz




11.10 - 11.40

Coffee break




Young binaries and stellar astrophysics



11.40 - 11.50

Featured object TY CrA

Vaz

11.50 - 12.30

Observational mass determinations

Simon

12.30 - 12.40

Featured object GG Tau

White

12.40 - 12.50

Featured object: eclipsing SB2 RXJ 0529.4 +0041

Covino

12.50 - 13.30

Constraints on Pre-Main-Sequence models


Palla /Stahler

13.30 - 14.00

Conference photograph at Einsteinturm



14.00 - 15.00

Lunch break



15.00 - 15.40

Invited debate: status of Pre-Main-Sequence tracks


Baraffe, Wuchterl

15.40 - 16.40

Poster discussion session



16.40 - 17.10

Coffee break




Gedanken-Experimente



17.10 - 17.30

Effect of unresolved binaries on PMS ages/masses

Hartigan

17.30 - 17.50

Effect of unresolved binaries on the IMF

Malkov / Zinnecker

17.50 - 18.30

Evolutionary binary population synthesis


Portegies Zwart

19.00 - 23.00

Mini-tour and Conference Dinner at Filmstudio Babelsberg
(Restaurant "Prinz Eisenherz")




Saturday, April 15, 2000



Closing perspectives



09.00 - 09.30

Microlensing and distant binary populations


Di Stefano


Panel discussion



09.30 - 11.00

a) Frontiers of observations




 optical / IR interferometry

Hummel


 mm / sub-mm interferometry

Guilloteau


adaptiv optics / spectroscopy

Close


space missions (NGST etc.)



Stapelfeldt

11.00 - 11.30

Coffee break



11.30 - 13.00

b) Frontiers of theory




planet formation in binary systems

Kley


angular momentum transfer in binary disks

Terquem


3D numerical hydrodynamics: SPH vs. AMR

Plewa


3D radiative transfer: grid vs. Monte Carlo


Henning

13.00 - 13.10

Impressions of IAU 200


Ebert

13.10 - 13.30

Highlights and farewell


Mathieu