The Pristine survey - XVI. The metallicity of 26 stellar streams around the Milky Way detected with the STREAMFINDER in Gaia EDR3 - Archive ouverte du site Alsace Access content directly
Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2022

The Pristine survey - XVI. The metallicity of 26 stellar streams around the Milky Way detected with the STREAMFINDER in Gaia EDR3

Abstract

We use the photometric metallicities provided by the panoramic Pristine survey to study the veracity and derive the metallicities of the numerous stellar streams found by the application of the STREAMFINDER algorithm to the Gaia Early Data Release 3 data. All 26 streams present in Pristine show a clear metallicity distribution function, which provides an independent check of the reality of these structures, supporting the reliability of STREAMFINDER in finding streams and the power of Pristine to measure precise metallicities. We further present six candidate structures with coherent phase-space and metallicity signals that are very likely streams. The majority of studied streams are very metal-poor (14 structures with [Fe/H] < -2.0) and include three systems with [Fe/H] < -2.9 (C-11, C-19, and C-20). These streams could be the closest debris of low-luminosity dwarf galaxies or may have originated from globular clusters of significantly lower metallicity than any known current Milky Way globular cluster. Our study shows that the promise of the Gaia data for Galactic Archeology studies can be substantially strengthened by quality photometric metallicities, allowing us to peer back into the earliest epochs of the formation of our Galaxy and its stellar halo constituents.
Fichier principal
Vignette du fichier
stac2426.pdf (7.5 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

insu-03794481 , version 1 (23-03-2023)

Identifiers

Cite

Nicolas F. Martin, Rodrigo A. Ibata, Else Starkenburg, Zhen Yuan, Khyati Malhan, et al.. The Pristine survey - XVI. The metallicity of 26 stellar streams around the Milky Way detected with the STREAMFINDER in Gaia EDR3. Monthly Notices of the Royal Astronomical Society, 2022, 516, pp.5331-5354. ⟨10.1093/mnras/stac2426⟩. ⟨insu-03794481⟩
27 View
33 Download

Altmetric

Share

Gmail Facebook X LinkedIn More