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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
ALMA ACA and Nobeyama Observations of Two Orion Cores in Deuterated Molecular Lines
Astrophysical Journal, Volume 895, No. 2, Article 119, Year 2020
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Description
We mapped two molecular cloud cores in the Orion A cloud with the 7 m Array of the Atacama Compact Array (ACA) of the Atacama Large Millimeter/submillimeterArray (ALMA) and with the Nobeyama 45 m radio telescope. These cores have bright N2D+ emission in single-pointing observations with the Nobeyama 45 m radio telescope, have a relatively high deuterium fraction, and are thought to be close to the onset of star formation. One is a star-forming core, and the other is starless. These cores are located along filaments observed in N2H+ and show narrow line widths of 0.41 km s-1 and 0.45 km s-1 in N2D+, respectively, with the Nobeyama 45 m telescope. Both cores were detected with the ALMA ACA 7 m Array in the continuum and molecular lines at Band 6. The starless core G211 shows a clumpy structure with several sub-cores, which in turn show chemical differences. Also, the sub-cores in G211 have internal motions that are almost purely thermal. The starless sub-core G211D, in particular, shows a hint of the inverse P Cygni profile, suggesting infall motion. The star-forming core G210 shows an interesting spatial feature of two N2D+ peaks of similar intensity and radial velocity located symmetrically with respect to the single dust continuum peak. One interpretation is that the two N2D+ peaks represent an edge-on pseudo-disk. The CO outflow lobes, however, are not directed perpendicular to the line connecting both N2D+ peaks. © 2020. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Tatematsu, Ken'Ichi
Japan, Minato
National Institutes of Natural Sciences
Japan, Hayama
The Graduate University for Advanced Studies
Liu, Tie
China, Beijing
Chinese Academy of Sciences
South Korea, Daejeon
Korea Astronomy and Space Science Institute
United States, Hilo
East Asian Observatory
Kim, Gwanjeong
Japan, Minato
National Institutes of Natural Sciences
Yi, Heeweon
South Korea, Seoul
Kyung Hee University
Lee, Jeong Eun
South Korea, Seoul
Kyung Hee University
Hirano, Naomi
Taiwan, Nankang
Academia Sinica Taiwan
Liu, Shengyuan
Taiwan, Nankang
Academia Sinica Taiwan
Ohashi, Satoshi
Japan, Wako
Riken the Institute of Physical and Chemical Research
Sanhueza, Patricio
Japan, Hayama
The Graduate University for Advanced Studies
Japan, Minato
National Institutes of Natural Sciences
Evans, Neal J.
United States, Austin
The University of Texas at Austin
Fuller, Gary A.
United Kingdom, Manchester
The University of Manchester
Kandori, Ryo
Japan, Minato
National Institutes of Natural Sciences
Choi, Minho
South Korea, Daejeon
Korea Astronomy and Space Science Institute
Kang, Miju
South Korea, Daejeon
Korea Astronomy and Space Science Institute
Feng, Siyi
Japan, Minato
National Institutes of Natural Sciences
China, Beijing
Peking University
Hirota, Tomoya
Japan, Hayama
The Graduate University for Advanced Studies
Japan, Minato
National Institutes of Natural Sciences
Lu, Xing
Japan, Minato
National Institutes of Natural Sciences
Thompson, Mark A.
United Kingdom, Hatfield
University of Hertfordshire
Wu, Yuefang
China, Beijing
Peking University
Li, D. H.
China, Beijing
Chinese Academy of Sciences
Kim, Kee-tae
South Korea, Daejeon
Korea Astronomy and Space Science Institute
South Korea, Daejeon
University of Science and Technology Ust
Wang, Ke
China, Beijing
Peking University
Germany, Garching Bei Munchen
European Southern Observatory
Ristorcelli, Isabelle
France, Paris
Cnrs Centre National de la Recherche Scientifique
Juvela, Mika J.
Finland, Helsinki
Helsingin Yliopisto
Toth, L. Viktor
Hungary, Budapest
Eötvös Loránd Tudományegyetem
Statistics
Citations: 13
Authors: 25
Affiliations: 22
Identifiers
Doi:
10.3847/1538-4357/ab8d3e
ISSN:
0004637X
Research Areas
Environmental