Navigation auf zora.uzh.ch

Search ZORA

ZORA (Zurich Open Repository and Archive)

A Globular Cluster toward M87 with a Radial Velocity < - 1000 km s-1: The First Hypervelocity Cluster

Caldwell, Nelson; Strader, Jay; Romanowsky, Aaron J; Brodie, Jean P; Moore, Ben; Diemand, Jürg; Martizzi, Davide (2013). A Globular Cluster toward M87 with a Radial Velocity < - 1000 km s-1: The First Hypervelocity Cluster. Astrophysical Journal Letters, 787:L11.

Abstract

We report the discovery of an object near M87 in the Virgo Cluster with an extraordinary blueshift of -1025 km s-1, offset from the systemic velocity by >2300 km s-1. Evaluation of photometric and spectroscopic data provides strong evidence that this object is a distant massive globular cluster, which we call HVGC-1 in analogy to Galactic hypervelocity stars. We consider but disfavor more exotic interpretations, such as a system of stars bound to a recoiling black hole. The odds of observing an outlier as extreme as HVGC-1 in a virialized distribution of intracluster objects are small; it appears more likely that the cluster was (or is being) ejected from Virgo following a three-body interaction. The nature of the interaction is unclear, and could involve either a subhalo or a binary supermassive black hole at the center of M87.

Additional indexing

Item Type:Journal Article, refereed, further contribution
Communities & Collections:07 Faculty of Science > Institute for Computational Science
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > Astronomy and Astrophysics
Physical Sciences > Space and Planetary Science
Language:English
Date:May 2013
Deposited On:13 Aug 2014 14:40
Last Modified:03 Nov 2024 04:30
Publisher:IOP Publishing
ISSN:2041-8205
OA Status:Closed
Free access at:Official URL. An embargo period may apply.
Publisher DOI:https://doi.org/10.1088/2041-8205/787/1/L11

Metadata Export

Statistics

Citations

Dimensions.ai Metrics
16 citations in Web of Science®
18 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

32 downloads since deposited on 13 Aug 2014
2 downloads since 12 months
Detailed statistics

Authors, Affiliations, Collaborations

Similar Publications