Circum-nuclear eccentric gas flow in the Galactic Center revealed by ALMA CMZ Exploration Survey (ACES)
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| author | Sofue, Yoshiaki Oka, Tomoharu Longmore, Steven N. Walker, Daniel Ginsburg, Adam Henshaw, Jonathan D. Bally, John Barnes, Ashley T. Battersby, Cara Colzi, Laura Ho, Paul Jimenez-Serra, Izaskun Kruijssen, J. M. Diederik Mills, Elizabeth Petkova, Maya A. Sormani, Mattia C. Wallace, Jennifer Armijos-Abendaño, Jairo Dutkowska, Katarzyna M. Enokiya, Rei García, Pablo Gramze, Savannah Henkel, Christian Hsieh, Pei-Ying Hu, Yue Immer, Katharina Iwata, Yuhei Karoly, Janik Klessen, Ralf S. Kohno, Kotaro Krumholz, Mark R. Lipman, Dani Morris, Mark R. Nogueras-Lara, Francisco Pineda, Jaime E. Martín, Sergio Requenatorres, Miguel Angel Rivilla, Víctor M. Riquelme-Vásquez, Denise Sánchez-Monge, Álvaro Santa-Maria, Miriam G. Smith, Howard A. Tolls, Volker Wang, Q. Daniel |
| author_facet | Sofue, Yoshiaki Oka, Tomoharu Longmore, Steven N. Walker, Daniel Ginsburg, Adam Henshaw, Jonathan D. Bally, John Barnes, Ashley T. Battersby, Cara Colzi, Laura Ho, Paul Jimenez-Serra, Izaskun Kruijssen, J. M. Diederik Mills, Elizabeth Petkova, Maya A. Sormani, Mattia C. Wallace, Jennifer Armijos-Abendaño, Jairo Dutkowska, Katarzyna M. Enokiya, Rei García, Pablo Gramze, Savannah Henkel, Christian Hsieh, Pei-Ying Hu, Yue Immer, Katharina Iwata, Yuhei Karoly, Janik Klessen, Ralf S. Kohno, Kotaro Krumholz, Mark R. Lipman, Dani Morris, Mark R. Nogueras-Lara, Francisco Pineda, Jaime E. Martín, Sergio Requenatorres, Miguel Angel Rivilla, Víctor M. Riquelme-Vásquez, Denise Sánchez-Monge, Álvaro Santa-Maria, Miriam G. Smith, Howard A. Tolls, Volker Wang, Q. Daniel |
| contents | We analyze the CS (J=2-1) line cube from the internal data release obtained by the large-scale program "ALMA CMZ Exploration Survey (ACES)" to investigate the kinematic structure of the innermost $\sim 10$ pc region of the Galaxy, which contains the high-velocity compact cloud (HVCC) at $(l,b,v_{\rm lsr})\sim(+0^\circ.02,-0^\circ.02, 100 {\rm km~s}^{-1})$ (hereafter G0.02). The longitude-velocity diagram (LVD) of the cloud draws an elliptical structure, which is interpreted as an orbital trajectory in the $(l,V_{\rm lsr})$ space of a noncircular (eccentric) motion of the molecular gas in the gravitational potential of an extended mass distribution in the central 10 pc of the Galaxy. We argue that G0.02 is a kinematic tracer of the inner potential, a rare case of a dense gas following an eccentric orbit in the nuclear gravitational field. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_11553 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Circum-nuclear eccentric gas flow in the Galactic Center revealed by ALMA CMZ Exploration Survey (ACES) Sofue, Yoshiaki Oka, Tomoharu Longmore, Steven N. Walker, Daniel Ginsburg, Adam Henshaw, Jonathan D. Bally, John Barnes, Ashley T. Battersby, Cara Colzi, Laura Ho, Paul Jimenez-Serra, Izaskun Kruijssen, J. M. Diederik Mills, Elizabeth Petkova, Maya A. Sormani, Mattia C. Wallace, Jennifer Armijos-Abendaño, Jairo Dutkowska, Katarzyna M. Enokiya, Rei García, Pablo Gramze, Savannah Henkel, Christian Hsieh, Pei-Ying Hu, Yue Immer, Katharina Iwata, Yuhei Karoly, Janik Klessen, Ralf S. Kohno, Kotaro Krumholz, Mark R. Lipman, Dani Morris, Mark R. Nogueras-Lara, Francisco Pineda, Jaime E. Martín, Sergio Requenatorres, Miguel Angel Rivilla, Víctor M. Riquelme-Vásquez, Denise Sánchez-Monge, Álvaro Santa-Maria, Miriam G. Smith, Howard A. Tolls, Volker Wang, Q. Daniel Astrophysics of Galaxies We analyze the CS (J=2-1) line cube from the internal data release obtained by the large-scale program "ALMA CMZ Exploration Survey (ACES)" to investigate the kinematic structure of the innermost $\sim 10$ pc region of the Galaxy, which contains the high-velocity compact cloud (HVCC) at $(l,b,v_{\rm lsr})\sim(+0^\circ.02,-0^\circ.02, 100 {\rm km~s}^{-1})$ (hereafter G0.02). The longitude-velocity diagram (LVD) of the cloud draws an elliptical structure, which is interpreted as an orbital trajectory in the $(l,V_{\rm lsr})$ space of a noncircular (eccentric) motion of the molecular gas in the gravitational potential of an extended mass distribution in the central 10 pc of the Galaxy. We argue that G0.02 is a kinematic tracer of the inner potential, a rare case of a dense gas following an eccentric orbit in the nuclear gravitational field. |
| title | Circum-nuclear eccentric gas flow in the Galactic Center revealed by ALMA CMZ Exploration Survey (ACES) |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2506.11553 |