Dr
Philippe André
(CEA Saclay)
05/06/2019 13:30
Herschel imaging surveys of Galactic molecular clouds have emphasized the
quasi-universality of the filamentary structure of the cold ISM and the key
role of filaments in the star formation process. Planck polarization data
moreover suggest that the formation and evolution of star-forming filaments
is at least partly controlled by magnetic fields.
I will summarize the main objectives...
Dr
Alessia Ritacco
(IRAM - Granada)
05/06/2019 14:00
NIKA2 is equipped with a polarization system composed by a multi-mesh half wave plate (HWP) and a polarizer placed at the cryostat stage of 100 mK which transmits and re
ects the two orientation of the linear polarization on two 1mm KID-arrays. The polarizer is needed because the NIKA2 detectors KIDs are unsensitive to the polarization, the warm HWP placed in front of the cryostat window...
M.
Hamza AJEDDIG
(Département d’Astrophysique (AIM), CEA Saclay, 91191 Gif-sur-Yvette, France)
05/06/2019 14:30
Highlighting the role of magnetic fields in the star formation process is crucial. Observations have already shown that magnetic fields play an important role in the early stages of star formation. The high spatial resolution (~0.01 to 0.05 pc) provided by NIKA2-Pol 1.2 mm polarimetric imaging of nearby clouds will help us to start clarifying the geometry of the B field within dense cores and...
Dr
Jean-François Robitaille
(IPAG - Univ. Grenoble Alpes)
05/06/2019 14:55
Observations of the polarised dust emission with Planck and the future SPICA at large scale and with ALMA, SCUBA2 and NIKA2 at smaller scales trace the interaction between the magnetic field and the denser part of the ISM as molecular clouds and star formation regions. However, a clear interpretation of the Stokes parameters Q and U, and of the associated polarisation vector P, is difficult....
Dr
Alessia Ritacco
(IRAM - Granada)
05/06/2019 15:55
NIKA, the NIKA2 pathnder, was equipped of a room temperature polarization system (a half
wave plate and a grid polarizer facing the cryostat window). This polarization system was the test bench for the NIKA2 polarimeter and was used during few observational/technical campaigns between 2014 and 2015. In particular during the last observing week of NIKA at the IRAM 30m telescope, in February...
