2D kinematics of massive stars near the Galactic Centre
Por favor, use este identificador para citar o enlazar este ítem:
http://hdl.handle.net/10045/112520
Título: | 2D kinematics of massive stars near the Galactic Centre |
---|---|
Autor/es: | Libralato, Mattia | Lennon, Daniel J. | Bellini, Andrea | van der Marel, Roeland | Clark, Simon J. | Najarro de la Parra, Francisco | Patrick, Lee R. | Anderson, Jay | Bedin, Luigi R. | Crowther, Paul A. | de Mink, Selma E. | Evans, Chris | Platais, Imants | Sabbi, Elena | Sohn, Sangmo Tony |
Grupo/s de investigación o GITE: | Astrofísica Estelar (AE) |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Física Aplicada |
Palabras clave: | Proper motions | Stars: massive | Galaxy: centre | Open clusters and associations: individual: Quintuplet | Open clusters and associations: individual: Arches |
Área/s de conocimiento: | Astronomía y Astrofísica |
Fecha de publicación: | ene-2021 |
Editor: | Oxford University Press |
Cita bibliográfica: | Monthly Notices of the Royal Astronomical Society. 2021, 500(3): 3213-3239. https://doi.org/10.1093/mnras/staa3329 |
Resumen: | The presence of massive stars (MSs) in the region close to the Galactic Centre (GC) poses several questions about their origin. The harsh environment of the GC favours specific formation scenarios, each of which should imprint characteristic kinematic features on the MSs. We present a 2D kinematic analysis of MSs in a GC region surrounding Sgr A* based on high-precision proper motions obtained with the Hubble Space Telescope. Thanks to a careful data reduction, well-measured bright stars in our proper-motion catalogues have errors better than 0.5 mas yr−1. We discuss the absolute motion of the MSs in the field and their motion relative to Sgr A*, the Arches, and the Quintuplet. For the majority of the MSs, we rule out any distance further than 3–4 kpc from Sgr A* using only kinematic arguments. If their membership to the GC is confirmed, most of the isolated MSs are likely not associated with either the Arches or Quintuplet clusters or Sgr A*. Only a few MSs have proper motions, suggesting that they are likely members of the Arches cluster, in agreement with previous spectroscopic results. Line-of-sight radial velocities and distances are required to shed further light on the origin of most of these massive objects. We also present an analysis of other fast-moving objects in the GC region, finding no clear excess of high-velocity escaping stars. We make our astro-photometric catalogues publicly available. |
Patrocinador/es: | ML and AB acknowledge support from STScI grants GO 12915 and 13771. DJL acknowledges support from the Spanish Government Ministerio de Ciencia, Innovación y Universidades through grants PGC-2018-091 3741-B-C22 and from the Canarian Agency for Research, Innovation and Information Society (ACIISI), of the Canary Islands Government, and the European Regional Development Fund (ERDF), under grant with reference ProID2017010115. LRP acknowledges support from the Generalitat Valenciana through the grant PROMETEO/2019/041. LRB acknowledges partial support by MIUR under PRIN programme no. 2017Z2HSMF. |
URI: | http://hdl.handle.net/10045/112520 |
ISSN: | 0035-8711 (Print) | 1365-2966 (Online) |
DOI: | 10.1093/mnras/staa3329 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2020 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1093/mnras/staa3329 |
Aparece en las colecciones: | INV - Astrofísica Estelar - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Libralato_etal_2021_MNRAS.pdf | 15,15 MB | Adobe PDF | Abrir Vista previa | |
Todos los documentos en RUA están protegidos por derechos de autor. Algunos derechos reservados.