Circumnuclear eccentric gas flow in the Galactic Center revealed by ALMA CMZ Exploration Survey (ACES)

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 ∼10 pc region of the Galaxy, which contains the high-velocity compact cloud (HVCC) at (l, b, vLSR) ∼ (...

Descripción completa

Detalles Bibliográficos
Autores: 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, Jiménez-Serra, Izaskun, Kruijssen, J. M. Diederik, Mills, Elisabeth A. C., Petkova, Maya A ., Sormani, Mattia Carlo, Wallace, Jen, 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 R., Morris, Mark R., Nogueras Lara, Francisco, Pineda, Jaime E., Martín, Sergio, Requena-Torres, Miguel Ángel, Rivilla, Víctor M., Riquelme-Vásquez, Denise, Sánchez-Monge, Álvaro, Santa-María, Miriam G., Smith, Howard A., Tolls, Volker, Wang, Q. Daniel
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::56f2fa29e818fa15f2de6f3edbdcb2e0
Acceso en línea:http://hdl.handle.net/10261/430689
Access Level:acceso abierto
Palabra clave:Galaxy: center
Galaxy: structure
ISM: clouds
ISM: kinematics and dynamics
ISM: molecules
Descripción
Sumario: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 ∼10 pc region of the Galaxy, which contains the high-velocity compact cloud (HVCC) at (l, b, vLSR) ∼ (+0. ◦ 02, −0. ◦ 02, 100 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, vLSR) 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.

Similares en LA Referencia