Charting the Galactic Acceleration Field. I. A Search for Stellar Streams with Gaia DR2 and EDR3 with Follow-up from ESPaDOnS and UVES

Bibcode
2021ApJ...914..123I
DOI
10.3847/1538-4357/abfcc2
Ibata, Rodrigo; Malhan, Khyati; Martin, Nicolas; Aubert, Dominique; Famaey, Benoit; Bianchini, Paolo; Monari, Giacomo; Siebert, Arnaud; Thomas, Guillaume F.; Bellazzini, Michele; Bonifacio, Piercarlo; Caffau, Elisabetta; Renaud, Florent
Referencia bibliográfica

The Astrophysical Journal

Fecha de publicación:
6
2021
Revista
The Astrophysical Journal
Número de autores
13
Número de autores del IAC
1
Número de citas
118
Número de citas referidas
97
Descripción
We present maps of the stellar streams detected in the Gaia Data Release 2 (DR2) and Early Data Release 3 (EDR3) catalogs using the STREAMFINDER algorithm. We also report the spectroscopic follow-up of the brighter DR2 stream members obtained with the high-resolution CFHT/ESPaDOnS and VLT/UVES spectrographs as well as with the medium-resolution NTT/EFOSC2 spectrograph. Two new stellar streams that do not have a clear progenitor are detected in DR2 (named Hrd and Gunnthr), and seven are detected in EDR3 (named Gaia-6 to Gaia-12). Several candidate streams are also identified. The software also finds very long tidal tails associated with the 15 globular clusters: NGC 288, NGC 1261, NGC 1851, NGC 2298, NGC 2808, NGC 3201, M68, Cen, NGC 5466, Palomar 5, M5, NGC 6101, M92, NGC 6397, and NGC 7089. These stellar streams will be used in subsequent contributions in this series to chart the properties of the Galactic acceleration field on 100 pc to 100 kpc scales.
Proyectos relacionados
Una vista de nuestra galaxia, la Vía Láctea, con sus vecinos cercanos, las Nubes de Magallanes
Evolución Galáctica en el Grupo Local
La formación y evolución de galaxias es un problema fundamental en Astrofísica. Su estudio requiere “viajar atrás en el tiempo”, para lo cual hay dos enfoques complementarios. El mas extendido consiste en analizar las propiedades de las galaxias a diferentes distancias cosmológicas. Nuestro equipo se concentra en el otro enfoque, denominado
Matteo
Monelli
En ejecución
Tipo
Con árbitro
La Vía Láctea y el Grupo Local (MWLG)
Via Láctea
Materia oscura

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