IAU Focus Meeting FM4:
Magnetic fields along the star-formation sequence

August 30 – 31, 2018

 

Scientific Rationale:


It is believed that magnetic fields play important roles in star formation processes, in particular to overcome both the angular momentum and magnetic flux problems. Polarimetry from the optical to the centimeter wavelengths has been the most powerful observing technique to study magnetic fields: in this Focus Meeting we wish to bring together communities working with polarimetric observations of the various stages and objects along the star formation sequence, from the structure of star-forming molecular clouds to the arrival of young stars on the zero-age main sequence. The goal is to discuss how to compare observations of magnetic fields at different evolutionary stages and physical scales such that we can establish a coherent view of their key role in the multi-scale process of star formation. Combining results from different fields is complex, and thus we will emphasize how different measurements of the magnetic fields can be compared and interpreted into a coherent picture despite widely varying observing techniques, and the very different objects and physical scales that are probed.

 

Topics:

  • Polarimetric observations as a tracer of the magnetic fields across the scales and physical environments relevant to the star formation sequence
  • Observations of magnetic fields in filaments, star-forming cores, and protostars: polarized (sub-)millimeter emission from dust and molecules
  • Polarization of protoplanetary disks and young stars from polarized infrared emission, scattered light, and spectropolarimetry
  • Testing solutions to the angular momentum problem and magnetic flux problem in star formation thanks to observations of magnetic and velocity fields
  • New statistical tools and MHD models diagnostics to infer magnetic-field strengths and topologies from polarization data

 

Programme:

Thursday, 30. Aug.

MAGNETIC FIELDS IN CORES AND FILAMENTS
room: F1
08:30 - Soler, Juan Diego (Review on Observations of magnetic fields in star-forming clouds)
09:00 - Inutsuka, Shu-ichiro (Review on the role of magnetic field in the formation and evolution of filamentary molecular clouds)
09:30 - Andersson, B-G (Interstellar Dust Grain Alignment)
09:50 - Discussion



MAGNETIC FIELDS IN CORES AND FILAMENTS and MAGNETIC FIELDS IN PROTOSTARS
room: F1
13:30 - Kwon, Jungmi (Magnetic field structures in star-forming regions revealed by imaging polarimetry at multi-wavelengths)
13:30 - Fissel, Laura (The Formation of Dense Gas within Magnetized Molecular Clouds: A BLASTPol Study of the Vela C Giant Molecular Cloud)
14:10 - Tahani, Mehrnoosh (Helical Magnetic Fields in Molecular Clouds? A New Method to Determine the Line-of-Sight Magnetic Field Structure in Molecular Clouds)
14:30 - Lai, Shih-Ping (Review on observations of magnetic fields during the main accretion phase)

 



Friday, 31. Aug.

MAGNETIC FIELDS IN PROTOSTARS
room: F1
08:30 - Hennebelle, Patrick (Theoretical review on the roles of magnetic fields during the main accretion phase)
09:00 - Galametz, Maud (The role of magnetic fields in the early stages of star formation – confronting observations with theoretical expectations)
09:20 - Zhang, Qizhou (Magnetic fields and massive star formation)
09:40 - Stephens, Ian (Trying to Make Sense of Polarization Patterns in Circumstellar Disks)



MAGNETIC FIELDS IN PROTOSTARS and MAGNETIC FIELDS IN PMS STARS
room: F1
10:30 - Dall'Olio, Daria (Revealing magnetic fields towards massive protostars: a multi-scale approach using masers and dust)
10:50 - Tsukamoto, Yusuke (The impact of non-ideal effects on the circumstellar disk evolution and their observational signatures)
11:10 - Schoeller, Markus (Observational review of magnetic fields in Herbig Ae/Be stars)
11:40 - Jaervinen, Silva (Magnetic fields along the pre-main sequence: new magnetic field measurements of Herbig Ae stars using high resolution HARPS spectropolarimetry)



MAGNETIC FIELDS IN PMS STARS
room: F1
13:30 - Donati, Jean-Francois (Review on observations of magnetic fields of T Tauri stars and their inner accretion discs)
14:00 - Lizano, Susana (Review on magnetized models of Protoplanetary Disks)
14:30 - Kospal, Agnes (Magnetic field and accretion in the young eruptive star EX Lupi)
14:50 - Discussion



MAGNETIC FIELDS IN PMS STARS
room: F1
15:30 - Flock, Mario (Magnetized disk models of young circumstellar disks)
15:50 - Discussion

 

SOC:

  • Silvia Alencar, UFMG, Belo Horizonte, Brazil
  • Andrea Bracco, CEA/IRFU Astrophysics department, Saclay, France
  • Edith Falgarone, ENS, Paris, France
  • Josep Miquel Girart, IEEC, CSIC, Bellaterra, Spain
  • Martin Houde, Western University, London, Canada
  • Swetlana Hubrig, Leibniz-Institut fuer Astrophysik Potsdam, Germany (co-chair)
  • Chat Hull, NAOJ Chile Observatory, Japan (co-chair)
  • Jungmi Kwon, University of Tokyo, Japan
  • Anaëlle Maury, CEA/IRFU Astrophysics department, Saclay, France (co-chair)
  • Hiro Takami, ASIAA, Taipei, Taiwan
  • Helmut Wiesemeyer, Max Planck Institute for Radio Astronomy, Bonn, Germany
  • Qizhou Zhang, Harvard Smithsonian CfA, Cambridge, USA

 

Contact:

Anaëlle Maury 
anaelle.maury@cea.fr 

 

Link to External Website:

https://meetings.aip.de/iau30-fm4

 

XXX IAU General Assembly | ACV - Austria Center Vienna  | Bruno-Kreisky-Platz 1  | 1220 Vienna