Poster Presentation
ALMA Perseus Polarization Survey (ALPPS)
Presenter: Piyali Saha (Academia Sinica Institute of Astronomy and Astrophysics (ASIAA))
What is the role of the magnetic field in determining stellar multiplicity? Recent surveys of young protostars in the Perseus star-forming region have shown that proto-binary sources fragment on two different size scales: wide (~1000 au separation) and close (<250 au separation). The interpretation of this result is that turbulent fragmentation is the dominant formation mechanism at scales >1000 au, whereas the fragmentation of circumbinary disks dominates at scales <250 au. We aim to study the role of the magnetic field in the formation of this bimodal population of binary sources. For this we carried out 850 micron (Band 7) ALMA survey of dust polarization toward 25 Class 0 protostars in the Perseus star-forming region. The ALMA polarization observations of this survey (ALMA Perseus Polarization Survey; ALPPS), combined with complementary archival observations of stellar multiplicity, dust polarization, and spectral lines toward the same sample of sources from the VLA, ALMA, and GBT will allow us to investigate whether the predicted results of these fragmentation paradigms are correct. We will present preliminary results obtained from ALPPS in this workshop.
asiaa.sinica.edu.tw