2022
DOI: 10.1051/0004-6361/202243263
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Distance to the Brick cloud using stellar kinematics

Abstract: Context. The central molecular zone at the Galactic center is currently being studied intensively to understand how star formation proceeds under the extreme conditions of a galactic nucleus. Knowing the position of molecular clouds along the line of sight toward the Galactic center has had important implications in our understanding of the physics of the gas and star formation in the central molecular zone. It was recently claimed that the dense molecular cloud G0.253 + 0.016 (the Brick) has a distance of ∼7.… Show more

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Cited by 9 publications
(8 citation statements)
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References 34 publications
(46 reference statements)
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“…The µ b distribution is described by a two-Gaussian model that accounts for the NSD stars and also the contaminant stars from the Galactic bulge/bar. Our results are consistent with previous work (Shahzamanian et al 2022;Martínez-Arranz et al 2022;Nogueras-Lara 2022), with the exception of a somewhat smaller contribution from Galactic bulge/bar stars. We believe that this is due to the region used in this work, smaller and closer to the Galactic plane, which reduces the contamination from the Galactic bulge/bar.…”
Section: Discussionsupporting
confidence: 93%
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“…The µ b distribution is described by a two-Gaussian model that accounts for the NSD stars and also the contaminant stars from the Galactic bulge/bar. Our results are consistent with previous work (Shahzamanian et al 2022;Martínez-Arranz et al 2022;Nogueras-Lara 2022), with the exception of a somewhat smaller contribution from Galactic bulge/bar stars. We believe that this is due to the region used in this work, smaller and closer to the Galactic plane, which reduces the contamination from the Galactic bulge/bar.…”
Section: Discussionsupporting
confidence: 93%
“…We estimated the uncertainties of the GMM parameters resorting to Monte Carlo simulations and generating 1000 samples of synthetic data assuming that each data point can vary following a Gaussian distribution with a standard deviation equal to its uncertainty. The three-Gaussian distribution found for µ l agrees with previous work (Shahzamanian et al 2022;Martínez-Arranz et al 2022;Nogueras-Lara 2022) and indicates the presence of two stellar populations moving eastwards and westwards, which we interpret as NSD rotation. Our results are computed using absolute proper motions, which explains why the central peak is not close to zero.…”
Section: Proper Motion Distributionsupporting
confidence: 90%
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