@article{e88620a11f2b4df2895b9d921437173e,
title = "SUBARCSECOND ANALYSIS OF THE INFALLING-ROTATING ENVELOPE AROUND THE CLASS I PROTOSTAR IRAS 04365+2535",
abstract = "Subarcsecond images of the rotational line emission of CS and SO have been obtained toward the Class I protostar IRAS 04365+2535 in TMC-1A with ALMA. A compact component around the protostar is clearly detected in the CS and SO emission. The velocity structure of the compact component of CS reveals infalling-rotating motion conserving the angular momentum. It is well explained by a ballistic model of an infalling-rotating envelope with the radius of the centrifugal barrier (one-half of the centrifugal radius) of 50 au, although the distribution of the infalling gas is asymmetric around the protostar. The distribution of SO is mostly concentrated around the radius of the centrifugal barrier of the simple model. Thus, a drastic change in chemical composition of the gas infalling onto the protostar is found to occur at a 50 au scale probably due to accretion shocks, demonstrating that the infalling material is significantly processed before being delivered into the disk.",
keywords = "ISM: molecules, stars: low-mass, stars: protostars, techniques: interferometric",
author = "Nami Sakai and Yoko Oya and Ana L{\'o}pez-Sepulcre and Yoshimasa Watanabe and Takeshi Sakai and Tomoya Hirota and Yuri Aikawa and Cecilia Ceccarelli and Bertrand Lefloch and Emmanuel Caux and Charlotte Vastel and Claudine Kahane and Satoshi Yamamoto",
note = "Funding Information: This paper makes use of the following ALMA data: ADS/JAO.ALMA#2013.0.01102.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, auI/NRAO and NAOJ. This study is supported by Grant-in-Aids from Ministry of Education, Culture, Sports, Science, and Technologies of Japan (21224002, 25400223, and 25108005). The authors acknowledge financial support by JSPS and MAEE under the Japan-France integrated action programme (SAKURA: 25765VC). Publisher Copyright: {\textcopyright} 2016. The American Astronomical Society. All rights reserved.",
year = "2016",
month = apr,
day = "1",
doi = "10.3847/2041-8205/820/2/L34",
language = "English",
volume = "820",
journal = "Astrophysical Journal Letters",
issn = "2041-8205",
publisher = "IOP Publishing Ltd.",
number = "2",
}