Winding, Unwinding, Rewinding the Gaia Phase Spiral

Frankel, N, Semczuk, M, Antoja, T, Chakrabarti, S, Chiba, R, Grand, RJJ ORCID: 0000-0001-9667-1340, Hunt, JAS, Khoperskov, S, Li, ZY, Lutsenko, A, Ramos, P, Tavangar, K and Widrow, LM (2026) Winding, Unwinding, Rewinding the Gaia Phase Spiral. Publications of the Astronomical Society of the Pacific, 138 (6). ISSN 0004-6280

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Abstract

The Gaia Space Satellite has transformed the field of Galactic Dynamics by collecting 6D phase space information for hundreds of millions of stars. In 2018, it enabled the discovery of the Gaia Phase Spiral, a clear signal in the vertical motion of the stars that reveals how far from equilibrium the Galactic disk is. Seven years after the discovery of this structure, a workshop dedicated to the Phase Spiral took place at the Lorentz Center. Workshop participants summarized the current state of knowledge about the Phase Spiral and identified open questions and key areas to continue progressing in understanding the origin of the Phase Spiral and the physics governing the response of the disk to perturbations. Here, we aim to summarize the content and discussions of this workshop, share the resources that have been produced at this workshop with the broader community, and invite interested individuals to join on the projects that started.

Item Type:	Article
Uncontrolled Keywords:	5109 Space Sciences; 51 Physical Sciences; 5109 Space Sciences; 51 Physical Sciences; 0201 Astronomical and Space Sciences; Astronomy & Astrophysics; 5101 Astronomical sciences; 5107 Particle and high energy physics
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Astrophysics Research Institute
Publisher:	IOP Publishing
Date of acceptance:	11 May 2026
Date of first compliant Open Access:	15 September 2026
Date Deposited:	15 Sep 2026 12:47
Last Modified:	15 Sep 2026 12:47
DOI or ID number:	10.1088/1538-3873/ae6bee
URI:	https://researchonline.ljmu.ac.uk/id/eprint/29430

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