| Seminar: |
CPS Seminar
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| date: |
2021 December 14 (TUES) 16-17:20
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| Room: |
Online seminar (Zoom)
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| Speaker: |
KATAOKA Akimasa (National Astronomical Observatory of Japan)
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| Title: |
"ALMA revolution in the view of protoplanetary disks and planet formation"
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| Abstract: |
ALMA has revolutionized our view on protoplanetary disks, which are believed to be the birthplace of planets. We now know that protoplanetary disks are full of substructures such as rings and gaps, and it became even possible to directly compare the dust mass of the disk with that of the exoplanets. In the first half of this talk, I will summarize and share the current understanding of the disk with ALMA studies.Then, in the second half I will discuss our work using ALMA polarimetric observations. The ALMA polarization observations confirmed the dust scattering at millimeter wavelengths, suggesting that the size of the dust is around 100 microns with relatively compact structure. These results are inconsistent with previous observations suggesting millimeter-sized dust grains. If the interpretation of the polarization observations is correct, it would significantly change our understanding of the planet formation process. I would also like to discuss expectations for the ngVLA in the end of the talk.
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| Keywords: |
planet formation, ALMA, polarization
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| Organizer: |
SAITOH Takayuki
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