The Astrophysical Journal (Jan 2024)
Large-scale Mapping Observations of DCN and DCO+ toward Orion KL
- Kotomi Taniguchi,
- Prathap Rayalacheruvu,
- Teppei Yonetsu,
- Tatsuya Takekoshi,
- Bunyo Hatsukade,
- Kotaro Kohno,
- Tai Oshima,
- Yoichi Tamura,
- Yuki Yoshimura,
- Víctor Gómez-Rivera,
- Sergio Rojas-García,
- Arturo I. Gómez-Ruiz,
- David H. Hughes,
- F. Peter Schloerb,
- Liton Majumdar,
- Masao Saito,
- Iván Rodríguez-Montoya,
- David Sánchez-Arguelles,
- Ryohei Kawabe
Affiliations
- Kotomi Taniguchi
- ORCiD
- National Astronomical Observatory of Japan, National Institutes of Natural Sciences , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan ; [email protected]
- Prathap Rayalacheruvu
- ORCiD
- School of Earth and Planetary Sciences, National Institute of Science Education and Research , Jatni 752050, Odisha, India; Homi Bhabha National Institute , Training School Complex, Anushaktinagar, Mumbai 400094, India
- Teppei Yonetsu
- ORCiD
- Department of Physics, Graduate School of Science, Osaka Metropolitan University , 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
- Tatsuya Takekoshi
- ORCiD
- Kitami Institute of Technology , 165, Koen-cho, Kitami, Hokkaido 090-8507, Japan
- Bunyo Hatsukade
- ORCiD
- National Astronomical Observatory of Japan, National Institutes of Natural Sciences , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan ; [email protected]; Graduate Institute for Advanced Studies , SOKENDAI, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; Institute of Astronomy, Graduate School of Science, The University of Tokyo , 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan
- Kotaro Kohno
- ORCiD
- Institute of Astronomy, Graduate School of Science, The University of Tokyo , 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan; Research Center for the Early Universe, Graduate School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Tai Oshima
- ORCiD
- National Astronomical Observatory of Japan, National Institutes of Natural Sciences , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan ; [email protected]; Graduate Institute for Advanced Studies , SOKENDAI, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
- Yoichi Tamura
- ORCiD
- Department of Physics, Graduate School of Science, Nagoya University , Furocho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
- Yuki Yoshimura
- ORCiD
- Institute of Astronomy, Graduate School of Science, The University of Tokyo , 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan
- Víctor Gómez-Rivera
- ORCiD
- Corporación Mexicana de Investigación en Materiales S.A. de C.V. , Mexico; Instituto Nacional de Astrofísica , Óptica y Electrónica, Luis Enrique Erro 1, Tonantzintla C.P. 72840, Puebla, Mexico
- Sergio Rojas-García
- ORCiD
- Instituto Nacional de Astrofísica , Óptica y Electrónica, Luis Enrique Erro 1, Tonantzintla C.P. 72840, Puebla, Mexico
- Arturo I. Gómez-Ruiz
- ORCiD
- Instituto Nacional de Astrofísica , Óptica y Electrónica, Luis Enrique Erro 1, Tonantzintla C.P. 72840, Puebla, Mexico; Consejo Nacional de Ciencia y Tecnología , Av. Insurgentes Sur 1582, Col. Crédito Constructor, Demarcación Territorial Benito Juárez C.P. 03940, Ciudad de México, Mexico
- David H. Hughes
- Instituto Nacional de Astrofísica , Óptica y Electrónica, Luis Enrique Erro 1, Tonantzintla C.P. 72840, Puebla, Mexico
- F. Peter Schloerb
- Department of Astronomy, University of Massachusetts , Amherst, MA 01003, USA
- Liton Majumdar
- ORCiD
- School of Earth and Planetary Sciences, National Institute of Science Education and Research , Jatni 752050, Odisha, India; Homi Bhabha National Institute , Training School Complex, Anushaktinagar, Mumbai 400094, India
- Masao Saito
- ORCiD
- National Astronomical Observatory of Japan, National Institutes of Natural Sciences , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan ; [email protected]; Graduate Institute for Advanced Studies , SOKENDAI, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
- Iván Rodríguez-Montoya
- Instituto Nacional de Astrofísica , Óptica y Electrónica, Luis Enrique Erro 1, Tonantzintla C.P. 72840, Puebla, Mexico; Consejo Nacional de Humanidades, Ciencias y Tecnologías , Av. Insurgentes Sur 1582, Col. Crédito Constructor, Demarcación Territorial Benito Juárez, C.P. 03940, Ciudad de México, México
- David Sánchez-Arguelles
- ORCiD
- Instituto Nacional de Astrofísica , Óptica y Electrónica, Luis Enrique Erro 1, Tonantzintla C.P. 72840, Puebla, Mexico; Consejo Nacional de Humanidades, Ciencias y Tecnologías , Av. Insurgentes Sur 1582, Col. Crédito Constructor, Demarcación Territorial Benito Juárez, C.P. 03940, Ciudad de México, México
- Ryohei Kawabe
- ORCiD
- National Astronomical Observatory of Japan, National Institutes of Natural Sciences , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan ; [email protected]
- DOI
- https://doi.org/10.3847/1538-4357/ad1e5a
- Journal volume & issue
-
Vol. 963,
no. 1
p. 12
Abstract
We present emission maps ( $1\buildrel{\,\prime}\over{.} 5\,\times \,1\buildrel{\,\prime}\over{.} 5$ scale, corresponding to 0.18 pc) of the DCN ( J = 2 − 1) and DCO ^+ ( J = 2 − 1) lines in the 2 mm band toward the Orion KL region obtained with the 2 mm receiver system named B4R installed on the Large Millimeter Telescope. The DCN emission shows a peak at the Orion KL hot core position, whereas no DCO ^+ emission has been detected there. The DCO ^+ emission shows enhancement at the west side of the hot core, which is well shielded from the UV radiation from OB massive stars in the Trapezium cluster. We have derived the abundance ratio of DCN/DCO ^+ at three representative positions where both species have been detected. The gas components with V _LSR ≈ 7.5–8.7 km s ^−1 are associated with low abundance ratios of ∼4–6, whereas much higher abundance ratios (∼22–30) are derived for the gas components with V _LSR ≈ 9.2–11.6 km s ^−1 . We have compared the observed abundance ratio to our chemical models and found that the observed differences in the DCN/DCO ^+ abundance ratios are explained by different densities.
Keywords