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The spinning phase spiral in Gaia DR3

Alinder, Simon LU ; Mcmillan, Paul LU orcid and Bensby, Thomas LU orcid (2023) European Astronomical Society Annual Meeting 2023
Abstract
I will present the results of our investigation of the Gaia Phase Spiral using Gaia Data Release 3. The phase spiral is a pattern in the plane defined by the vertical velocity (VZ) and vertical distance from the Galactic plane (Z). We have been able to determine the phase spiral's orientation and strength, or amplitude, at different locations in the Galactic disc by using a model we developed for characterising the phase spiral. We have determined the rate of rotation of the phase spiral with Galactic azimuth and radius, finding that it changes like disturbance propagating through the disc. We have also found that the phase spiral is significantly stronger in a range of angular momenta in the outer disc than in the solar neighbourhood but... (More)
I will present the results of our investigation of the Gaia Phase Spiral using Gaia Data Release 3. The phase spiral is a pattern in the plane defined by the vertical velocity (VZ) and vertical distance from the Galactic plane (Z). We have been able to determine the phase spiral's orientation and strength, or amplitude, at different locations in the Galactic disc by using a model we developed for characterising the phase spiral. We have determined the rate of rotation of the phase spiral with Galactic azimuth and radius, finding that it changes like disturbance propagating through the disc. We have also found that the phase spiral is significantly stronger in a range of angular momenta in the outer disc than in the solar neighbourhood but then weakens further out in the disc. There is much to learn about the historical events which have shaped our Galaxy. Using Gaia data to investigate the phase spiral, we hope to better understand these processes. (Less)
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author
; and
organization
alternative title
Den roterande fas-spiralen i Gaia DR3
publishing date
type
Contribution to conference
publication status
published
subject
conference name
European Astronomical Society Annual Meeting 2023
conference location
Kraków, Poland
conference dates
2023-07-10 - 2023-07-14
language
English
LU publication?
yes
id
d90f703c-b7e2-4765-afcb-cb766cc73277
date added to LUP
2023-06-30 13:19:23
date last changed
2023-08-25 14:25:23
@misc{d90f703c-b7e2-4765-afcb-cb766cc73277,
  abstract     = {{I will present the results of our investigation of the Gaia Phase Spiral using Gaia Data Release 3. The phase spiral is a pattern in the plane defined by the vertical velocity (VZ) and vertical distance from the Galactic plane (Z). We have been able to determine the phase spiral's orientation and strength, or amplitude, at different locations in the Galactic disc by using a model we developed for characterising the phase spiral. We have determined the rate of rotation of the phase spiral with Galactic azimuth and radius, finding that it changes like disturbance propagating through the disc. We have also found that the phase spiral is significantly stronger in a range of angular momenta in the outer disc than in the solar neighbourhood but then weakens further out in the disc. There is much to learn about the historical events which have shaped our Galaxy. Using Gaia data to investigate the phase spiral, we hope to better understand these processes.}},
  author       = {{Alinder, Simon and Mcmillan, Paul and Bensby, Thomas}},
  language     = {{eng}},
  month        = {{06}},
  title        = {{The spinning phase spiral in Gaia DR3}},
  year         = {{2023}},
}