Molecular Clouds in the Galactic Plane from l = [59.°75, 74.°75] and b = [−5.°25, +5.°25]
In this paper we present the distribution of molecular gas in the Milky Way Galactic plane from l = [59.75, 74.75]° and b = [−5.25, +5.25]°, using the MWISP ^12 CO/ ^13 CO/C ^18 O emission-line data. The molecular gas in this region can be mainly attributed to the Local Spur, Local Arm, Perseus arm,...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal Supplement Series |
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| Online Access: | https://doi.org/10.3847/1538-4365/acd9a7 |
| _version_ | 1797694598032654336 |
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| author | Chunxue Li Hongchi Wang Yuehui Ma Lianghao Lin Yang Su Chong Li Yan Sun Xin Zhou Ji Yang |
| author_facet | Chunxue Li Hongchi Wang Yuehui Ma Lianghao Lin Yang Su Chong Li Yan Sun Xin Zhou Ji Yang |
| author_sort | Chunxue Li |
| collection | DOAJ |
| description | In this paper we present the distribution of molecular gas in the Milky Way Galactic plane from l = [59.75, 74.75]° and b = [−5.25, +5.25]°, using the MWISP ^12 CO/ ^13 CO/C ^18 O emission-line data. The molecular gas in this region can be mainly attributed to the Local Spur, Local Arm, Perseus arm, and Outer arm. Statistics of the physical properties of the molecular gas in each arm, such as excitation temperature, optical depth, and column density, are presented. Using the DBSCAN algorithm, we identified 15 extremely distant molecular clouds with kinematic distances of 14.72−17.77 kpc and masses of 363−520 M _⊙ , which we find could be part of the Outer Scutum–Centaurus (OSC) arm identified by Dame & Thaddeus and Sun et al. It is also possible that 12 of these 15 extremely distant molecular clouds constitute an independent structure between the Outer and the OSC arms or a spur. Two Gaussian components exist in the vertical distribution of the molecular gas in the Perseus spiral arm. These two Gaussian components correspond to two giant filaments parallel to the Galactic plane. We find an upward warping of the molecular gas in the Outer spiral arm with a displacement of around 270 pc with respect to the Galactic midplane. |
| first_indexed | 2024-03-12T02:59:10Z |
| format | Article |
| id | doaj.art-7e0912c086ef4755bdcba849c1faae19 |
| institution | Directory Open Access Journal |
| issn | 0067-0049 |
| language | English |
| last_indexed | 2024-03-12T02:59:10Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Supplement Series |
| spelling | doaj.art-7e0912c086ef4755bdcba849c1faae192023-09-03T14:59:26ZengIOP PublishingThe Astrophysical Journal Supplement Series0067-00492023-01-0126723010.3847/1538-4365/acd9a7Molecular Clouds in the Galactic Plane from l = [59.°75, 74.°75] and b = [−5.°25, +5.°25]Chunxue Li0https://orcid.org/0000-0002-8409-7908Hongchi Wang1https://orcid.org/0000-0003-0746-7968Yuehui Ma2https://orcid.org/0000-0002-8051-5228Lianghao Lin3https://orcid.org/0000-0001-8926-2215Yang Su4https://orcid.org/0000-0002-0197-470XChong Li5https://orcid.org/0000-0003-2218-3437Yan Sun6https://orcid.org/0000-0002-3904-1622Xin Zhou7https://orcid.org/0000-0003-2418-3350Ji Yang8https://orcid.org/0000-0001-7768-7320Purple Mountain Observatory and Key Laboratory of Radio Astronomy, Chinese Academy of Sciences , 10 Yuanhua Road, Qixia District, Nanjing 210033, People's Republic of China ; hcwang@pmo.ac.cn; School of Astronomy and Space Science, University of Science and Technology of China , 96 Jinzhai Road, Hefei 230026, People's Republic of ChinaPurple Mountain Observatory and Key Laboratory of Radio Astronomy, Chinese Academy of Sciences , 10 Yuanhua Road, Qixia District, Nanjing 210033, People's Republic of China ; hcwang@pmo.ac.cn; School of Astronomy and Space Science, University of Science and Technology of China , 96 Jinzhai Road, Hefei 230026, People's Republic of ChinaPurple Mountain Observatory and Key Laboratory of Radio Astronomy, Chinese Academy of Sciences , 10 Yuanhua Road, Qixia District, Nanjing 210033, People's Republic of China ; hcwang@pmo.ac.cnMax-Planck-Institut für Radioastronomie , Auf dem Hügel 69, D-53121 Bonn, GermanyPurple Mountain Observatory and Key Laboratory of Radio Astronomy, Chinese Academy of Sciences , 10 Yuanhua Road, Qixia District, Nanjing 210033, People's Republic of China ; hcwang@pmo.ac.cnSchool of Astronomy and Space Science, Nanjing University , 163 Xianlin Avenue, Nanjing 210023, People's Republic of China; Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University) , Ministry of Education, Nanjing 210023, People's Republic of ChinaPurple Mountain Observatory and Key Laboratory of Radio Astronomy, Chinese Academy of Sciences , 10 Yuanhua Road, Qixia District, Nanjing 210033, People's Republic of China ; hcwang@pmo.ac.cnPurple Mountain Observatory and Key Laboratory of Radio Astronomy, Chinese Academy of Sciences , 10 Yuanhua Road, Qixia District, Nanjing 210033, People's Republic of China ; hcwang@pmo.ac.cnPurple Mountain Observatory and Key Laboratory of Radio Astronomy, Chinese Academy of Sciences , 10 Yuanhua Road, Qixia District, Nanjing 210033, People's Republic of China ; hcwang@pmo.ac.cnIn this paper we present the distribution of molecular gas in the Milky Way Galactic plane from l = [59.75, 74.75]° and b = [−5.25, +5.25]°, using the MWISP ^12 CO/ ^13 CO/C ^18 O emission-line data. The molecular gas in this region can be mainly attributed to the Local Spur, Local Arm, Perseus arm, and Outer arm. Statistics of the physical properties of the molecular gas in each arm, such as excitation temperature, optical depth, and column density, are presented. Using the DBSCAN algorithm, we identified 15 extremely distant molecular clouds with kinematic distances of 14.72−17.77 kpc and masses of 363−520 M _⊙ , which we find could be part of the Outer Scutum–Centaurus (OSC) arm identified by Dame & Thaddeus and Sun et al. It is also possible that 12 of these 15 extremely distant molecular clouds constitute an independent structure between the Outer and the OSC arms or a spur. Two Gaussian components exist in the vertical distribution of the molecular gas in the Perseus spiral arm. These two Gaussian components correspond to two giant filaments parallel to the Galactic plane. We find an upward warping of the molecular gas in the Outer spiral arm with a displacement of around 270 pc with respect to the Galactic midplane.https://doi.org/10.3847/1538-4365/acd9a7Interstellar mediumInterstellar cloudsMolecular cloudsSurveys |
| spellingShingle | Chunxue Li Hongchi Wang Yuehui Ma Lianghao Lin Yang Su Chong Li Yan Sun Xin Zhou Ji Yang Molecular Clouds in the Galactic Plane from l = [59.°75, 74.°75] and b = [−5.°25, +5.°25] The Astrophysical Journal Supplement Series Interstellar medium Interstellar clouds Molecular clouds Surveys |
| title | Molecular Clouds in the Galactic Plane from l = [59.°75, 74.°75] and b = [−5.°25, +5.°25] |
| title_full | Molecular Clouds in the Galactic Plane from l = [59.°75, 74.°75] and b = [−5.°25, +5.°25] |
| title_fullStr | Molecular Clouds in the Galactic Plane from l = [59.°75, 74.°75] and b = [−5.°25, +5.°25] |
| title_full_unstemmed | Molecular Clouds in the Galactic Plane from l = [59.°75, 74.°75] and b = [−5.°25, +5.°25] |
| title_short | Molecular Clouds in the Galactic Plane from l = [59.°75, 74.°75] and b = [−5.°25, +5.°25] |
| title_sort | molecular clouds in the galactic plane from l 59 °75 74 °75 and b 5 °25 5 °25 |
| topic | Interstellar medium Interstellar clouds Molecular clouds Surveys |
| url | https://doi.org/10.3847/1538-4365/acd9a7 |
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