Candidate Hypervelocity Red Clump Stars in the Galactic Bulge Found Using the VVV and Gaia Surveys
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Archivos
Fecha
2019-12
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
Institute of Physics Publishing
Nombre de Curso
Licencia CC
Atribución 3.0 Chile (CC BY 3.0 CL)
Licencia CC
https://creativecommons.org/licenses/by/3.0/cl/
Resumen
We propose a new way to search for hypervelocity stars (HVS) in the Galactic bulge, by using red clump (RC) giants, that are good distance indicators. The second Gaia Data Release and the near-IR data from the VISTA Variables in the Via Lactea (VVV) Survey led to the selection of a volume limited sample of 34 bulge RC stars. A search in this combined data set leads to the discovery of seven candidate hypervelocity red clump stars in the Milky Way bulge. Based on this search we estimate the total production rate of hypervelocity RC stars from the central supermassive black hole (SMBH) to be N HVRC = 3.26 × 10-4 yr-1. This opens up the possibility of finding larger samples of HVS in the Galactic bulge using future surveys, closer to their main production site, if they originated from interactions of binaries with the central SMBH. © 2019. The American Astronomical Society. All rights reserved..
Notas
Indexación: Scopus
Palabras clave
Hypervelocity, Gaia, Black Hole
Citación
Astrophysical Journal Letters Volume 887, Issue 220 December 2019 Article number L39
DOI
10.3847/2041-8213/ab5c27