SIMBAD references

2025MNRAS.537..204P - Mon. Not. R. Astron. Soc., 537, 204-216 (2025/February-2)

Properties of the lower segment of M31's North West stream.

PRESTON J., ERKAL D., COLLINS M.L.M., IBATA R. and RICH R.M.

Abstract (from CDS):

We present a kinematic and spectroscopic analysis of 40 red giant branch stars, in 9 fields, exquisitely delineating the lower segment of the North West stream (NW-K2), which extends for $\sim$80 kpc from the centre of the Andromeda galaxy. We measure the stream's systemic velocity as -439.3$^{+4.1}_{-3.8}$ km s$^{-1}$ with a velocity dispersion =16.4$^{+5.6}_{-3.8}$ km s$^{-1}$ that is in keeping with its progenitor being a dwarf galaxy. We find no detectable velocity gradient along the stream. We determine $-1.3\pm0.1$$\le$$\langle[\mathrm{ Fe/H}]_{\rm spec}\rangle$$\le$$-1.2\pm0.8$ but find no metallicity gradient along the stream. We are able to plausibly associate NW-K2 with the globular clusters PAndAS-04, PAndAS-09, PAndAS-10, PAndAS-11, and PAndAS-12 but not with PAndAS-13 or PAndAS-15, which we find to be superimposed on the stream but not kinematically associated with it.

Abstract Copyright: © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): galaxies: dwarf - galaxies: interactions - Local Group

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 19

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