Uncovering cold dark matter halo substructure with tidal streams

By R. Ibata, Geraint F. Lewis, M. Irwin, Thomas R. Quinn. 2001

195 citations recorded by the source corpus.

Models for the formation and growth of structure in a cold-dark-matter-dominated universe predict that galaxy haloes should contain significant substructure. Studies of the Milky Way, however, have yet to identify the expected few hundred subhaloes with masses greater than about 106 M⊙. Here we propose a test for the presence of subhaloes in the haloes of galaxies. We show that the structure of the tidal tails of ancient globular clusters is very sensitive to heating by repeated close encounters with the massive dark subhaloes. We discuss the detection of such an effect in the context of the next generation of astrometric missions, and conclude that it should be easily detectable with the GAIA data set. The finding of a single extended cold stellar stream from a globular cluster would support alternative theories, such as self-interacting dark matter, that give rise to smoother haloes.

Subfields: Astronomy and Astrophysics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/5d2dc6f83f402f83e12fed928c2433a9317ead4a

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Citations in the corpus

Dark Matter Subhalos and the Dwarf Satellites of the Milky Way (2008, background): “…may be detectable via flux ratio anomalies in strong gravitational lenses (e.g. Metcalf & Madau 2001), through its effects on stellar streams (e.g. Ibata et al. 2002; Mayer et al. 2002), or possibly via γ-rays from dark matter annihilation in their cores (Bergstrom et al. 1999; Stoehr et al.…”
Stellar Streams Discovered in the Dark Energy Survey (2018, background): “However, if this underdensity is real it could be due to perturbations by subhaloes around the Milky Way (e.g. Ibata et al. 2002; Johnston et al. 2002).”
Luminosity function and radial distribution of Milky Way satellites in a ΛCDM Universe (2009, background): “…detect the presence of a significant dark population of subhaloes in the MW halo could come from the signatures of the interaction of such a population with the thin stellar streams in the MW halo ( e.g. Odenkirchen et al. 2001, Ibata et al. 2002, Johnston et al. 2002, Grillmair & Dionatos 2006).”
Bayesian strong gravitational-lens modelling on adaptive grids: objective detection of mass substructure in Galaxies (2008, background): “The dark substructure maybe detectable for example through its eff cts on stellar streams (e.g., Ibata et al. 2002; Mayer et al. 2002), viaγ-rays from dark matter annihilation (Bergström et al. 1999; Calcáneo-Rold´an & Moore 2000; Stoehr et al. 2003; Colafrancesco et al. 2006) or through…”
A Direct Measurement of Major Galaxy Mergers at z ≲ 3 (2003, background): “Some merger tidal debris may remain for several Gyrs, such as in our own galaxy (e.g., Ibata et al. 2002; Newberg et al. 2002), although these are likely the result of recent minor mergers.”
A Two Micron All Sky Survey View of the Sagittarius Dwarf Galaxy. I. Morphology of the Sagittarius Core and Tidal Arms (2003, methodology): “A similar approach was adopted by Ibata et al. (2002a) on the 2MASS Second Incremental Data Release; in their analysis of 26.4% of the sky, Ibata et al. identified a peak in the Mgiant candidate source counts corresponding to a Sgr plane with pole at ðl; bÞ ¼ ð95 ; 13 Þ. Ibata et al. (2001b) have…”
Halo Substructure and the Power Spectrum (2002, methodology): “One method relies on studying tidal tails associated with known Galactic satellites (Johnston, Spergel, & Haydn 2002; Ibata et al. 2002a, 2002b; Mayer et al. 2002).”
THE SHAPE OF THE INNER MILKY WAY HALO FROM OBSERVATIONS OF THE PAL 5 AND GD–1 STELLAR STREAMS (2016, background): “…budget (e.g., Flynn et al. 2006; Bovy & Rix 2013; McKee et al. 2015), the dark–matter halo’s shape and radial profile near and within its scale radius (e.g., Olling & Merrifield 2000; Binney & Piffl 2015), and the abundance of lowmass substructure (e.g., Johnston et al. 2002; Ibata et al. 2002).”
The number and size of subhalo-induced gaps in stellar streams (2016, background): “…lenses (see e.g. Mao & Schneider 1998; Dalal & Kochanek 2002; Hezaveh et al. 2013), or, alternatively, be revealed by gaps in the stellar streams around the Milky Way (MW) galaxy (see e.g. Ibata et al. 2002; Johnston, Spergel & Haydn 2002; Siegal-Gaskins & Valluri 2008; Carlberg 2009).”
Dark Matter Substructure and Gamma-Ray Annihilation in the Milky Way Halo (2006, background): “…via flux ratio anomalies in strong gravitational lenses (e.g., Metcalf & Madau 2001; Chiba 2002), through its effects on stellar streams (e.g., Ibata et al. 2002; Mayer et al. 2002), or possibly via -rays from dark matter annihilation in their cores (Bergström et al. 1999;…”
The Spur and the Gap in GD-1: Dynamical Evidence for a Dark Substructure in the Milky Way Halo (2018, background): “…a stellar stream and a dark matter subhalo would perturb the orderly structure of the stellar stream, produce a gap in the stream density (e.g., Ibata et al. 2002; Johnston et al. 2002; Carlberg 2012), and, depending on the impact geometry, possibly also fold a part of the stream (e.g., Yoon…”
A Two Micron All Sky Survey View of the Sagittarius Dwarf Galaxy. II. Swope Telescope Spectroscopy of M Giant Stars in the Dynamically Cold Sagittarius Tidal Stream (2004, background): “In addition, in principle, the velocity dispersion of tidal debris should provide a sensitive probe of the lumpiness of the halo (Moore et al. 1999; Johnston et al. 2002; Ibata et al. 2002; Mayer et al. 2002).”
CLUMPY STREAMS FROM CLUMPY HALOS: DETECTING MISSING SATELLITES WITH COLD STELLAR STRUCTURES (2010, methodology): “On global scales, they can be used to constrain the radial profile, shape and orientation of the Milky Way’s triaxial dark-matter halo (e.g. Johnston et al. 1999; Ibata et al. 2002; Johnston et al. 2005; Binney 2008; Eyre 2010; Koposov et al. 2010; Law & Majewski 2010).”
Small-Scale Challenges to the ΛCDM Paradigm (2017, methodology): “A promising technique for inferring the presence of the predicted population of lowmass, dark substructure within the Milky Way is through subhalos’ effects on very cold low velocity dispersion stellar streams (Ibata et al. 2002; Carlberg 2009; Yoon, Johnston & Hogg 2011).”
A Two Micron All Sky Survey View of the Sagittarius Dwarf Galaxy. III. Constraints on the Flattening of the Galactic Halo (2004, background): “As a final concern (and one that is much harder to correct for) thickening can also result from interactions with other massive — and possibly invisible — lumps in the halo (Moore et al. 1999; Ibata et al. 2002; Johnston, Spergel, & Haydn 2002).”
The total mass of the Large Magellanic Cloud from its perturbation on the Orphan stream (2018, background): “…were put forward as a new promising diagnostic, capable of constraining masses of Galactic satellites, even those entirely devoid of light (see e.g. Ibata et al. 2002; Johnston, Spergel & Haydn 2002; SiegalGaskins & Valluri 2008; Carlberg 2009; Yoon, Johnston & Hogg 2011; Ngan & Carlberg 2014;…”