Sub-Arcsecond Kinematic Structure of the Outow in the Vicinity of the Protostar in L483

Yoko Oya, Nami Sakai, Yoshimasa Watanabe, Ana Lopez-Sepulcre, Cecilia Ceccarelli, Bertrand Leoch, Satoshi Yamamoto

Research output: Contribution to journalArticlepeer-review


The bipolar outow associated with the Class 0 low-mass protostellar source (IRAS 18148-0440) in L483 has been studied in the CCH and CS line emission at 245 and 262 GHz, respectively. Sub-Arcsecond resolution observations of these lines have been conducted with ALMA. Structures and kinematics of the outow cavity wall are investigated in the CS line, and are analyzed by using a parabolic model of an outow. We constrain the inclination angle of the outow to be from 75 to 90, i.e.The outow is blowing almost perpendicular to the line of sight. Comparing the outow parameters derived from the model analysis with those of other sources, we confirm that the opening angle of the outow and the gas velocity on its cavity wall correlate with the dynamical timescale of the outows. Moreover, a hint of a rotating motion of the outow cavity wall is found. Although the rotation motion is marginal, the specific angular momentum of the gas on the outow cavity wall is evaluated to be comparable to or twice that of the infalling-rotating envelope of L483.

Original languageEnglish
JournalUnknown Journal
Publication statusPublished - 2018 Jun 27
Externally publishedYes

ASJC Scopus subject areas

  • General

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