Baby Star Growing Fast through
A 3-Layer Pancake-like Protostellar Disk
Released: 4th July, 2023, Academia Sinica, Institute of Astronomy & Astrophysics (ASIAA), Taiwan
Figure1. The ALMA Map and Model of the HH 211 Protostellar Disk: (a) The map of the disk obtained by ALMA in dust emission. A Solar System size scale is added for the size comparison. (b) A highpass filter was applied to remove the smooth structure of the disk, in order to reveal the 3 linear structures (as marked by 3 dotted lines) perpendicular to the disk axis. (c) A disk model that can reproduce the disk structure. The left and right linear structures can be reproduced by the two warm disk surfaces, while the middle one is produced by the warm spiral arm in the midplane. (d) A face-on view of the disk model to show the full structure of the spiral arms. The spiral arms are trailing with their outer tip pointing in the direction opposite to the disk rotation. Credit: Lee et al.
The Atacama Large Millimeter/submillimeter Array (ALMA), an international astronomy facility, is a partnership of the European Organization for Astronomical Research in the Southern Hemisphere (ESO), the U.S. National Science Foundation (NSF) and the National Institutes of Natural Sciences (NINS) of Japan in cooperation with the Republic of Chile. ALMA is funded by ESO on behalf of its Member States, by NSF in cooperation with the National Research Council of Canada (NRC) and the National Science and Technology Council of Taiwan (NSTC), and by NINS in cooperation with the Academia Sinica (AS) in Taiwan and the Korea Astronomy and Space Science Institute (KASI).
ALMA construction and operations are led by ESO on behalf of its Member States; by the National Radio Astronomy Observatory (NRAO), managed by Associated Universities, Inc. (AUI), on behalf of North America; and by the National Astronomical Observatory of Japan (NAOJ) on behalf of East Asia. The Joint ALMA Observatory (JAO) provides the unified leadership and management of the construction, commissioning and operation of ALMA.
This research was presented in a paper “First Detection of A Linear Structure in the Midplane of the Young HH 211 Protostellar Disk: A Spiral Arm?” by Lee et al. appeared in Astrophysical Journal Letters.
The team is composed of Chin-Fei Lee (ASIAA, Taiwan; National Taiwan University, Taiwan), Kai-Syun Jhan (ASIAA, Taiwan; National Taiwan University, Taiwan) and Anthony Moraghan (ASIAA, Taiwan)
Dr. Chin-Fei Lee, Email: firstname.lastname@example.org, Tel: +886 2 2366 5445