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  4. The Hidden Past of M92: Detection and Characterization of a Newly Formed 17 degrees Long Stellar Stream Using the Canada-France Imaging Survey
 
research article

The Hidden Past of M92: Detection and Characterization of a Newly Formed 17 degrees Long Stellar Stream Using the Canada-France Imaging Survey

Thomas, Guillaume F.
•
Jensen, Jaclyn
•
McConnachie, Alan
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October 1, 2020
The Astrophysical Journal

We present an analysis of the structure, kinematics, and orbit of a newly found stellar stream emanating from the globular cluster M92 (NGC 6341). This stream was discovered in an improved matched-filter map of the outer Galaxy, based on a "color-color-magnitude" diagram, created using photometry from the Canada-France Imaging Survey and the Pan-STARRS 1 3 pi survey. We find the stream to have a length of 17 degrees (2.5 kpc at the distance of M92), a width dispersion of 029(42 pc), and a stellar mass of [3.17 0.89] x 10(4)M(10% of the stellar mass of the current main body of M92). We examine the kinematics of main-sequence, red giant, and blue horizontal branch stars belonging to the stream and that have proper motion measurements from the second data release of Gaia.N-body simulations suggest that the stream was likely formed very recently (during the last similar to 500 Myr) forcing us to question the orbital origin of this ancient, metal-poor globular cluster.

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Type
research article
DOI
10.3847/1538-4357/abb6f7
Web of Science ID

WOS:000578810200001

Author(s)
Thomas, Guillaume F.
Jensen, Jaclyn
McConnachie, Alan
Cote, Patrick
Venn, Kim
Longeard, Nicolas  
Carlberg, Raymond
Chapman, Scott
Cuillandre, Jean-Charles
Famaey, Benoit
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Date Issued

2020-10-01

Publisher

IOP PUBLISHING LTD

Published in
The Astrophysical Journal
Volume

902

Issue

2

Start page

89

Subjects

Astronomy & Astrophysics

•

globular star clusters

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milky way dynamics

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milky way stellar halo

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galaxy formation

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milky-way

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globular-clusters

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tidal tails

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star-clusters

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galactic bar

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palomar 5

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halo

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substructure

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gaps

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mass

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LASTRO  
Available on Infoscience
June 19, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/179389
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