SIMBAD references

2020ApJ...902...89T - Astrophys. J., 902, 89-89 (2020/October-3)

The hidden past of M92: detection and characterization of a newly formed 17° long stellar stream using the Canada-France Imaging Survey.

THOMAS G.F., JENSEN J., McCONNACHIE A., COTE P., VENN K., LONGEARD N., CARLBERG R., CHAPMAN S., CUILLANDRE J.-C., FAMAEY B., FERRARESE L., GWYN S., HAMMER F., IBATA R.A., MALHAN K., MARTIN N.F., MEI S., NAVARRO J.F., REYLE C. and STARKENBURG E.

Abstract (from CDS):

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 3π survey. We find the stream to have a length of 17° (2.5 kpc at the distance of M92), a width dispersion of 0.°29(42 pc), and a stellar mass of [3.17 ± 0.89] x 104 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 ∼500 Myr) forcing us to question the orbital origin of this ancient, metal-poor globular cluster.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Globular star clusters - Milky Way dynamics - Milky Way stellar halo - Galaxy formation

Simbad objects: 16

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2021.04.19-00:08:40

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