The Detection of a 45° Tidal Stream Associated with the Globular Cluster NGC 5466

By C. Grillmair, R. Johnson. 2006

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We report on the detection in Sloan Digital Sky Survey data of a 45° tidal stream of stars, extending from Bootes to Ursa Major, which we associate with the halo globular cluster NGC 5466. Using an optimal contrast, matched-filter technique, we find a long, almost linear stellar stream with an average width of 1.°4. The stream is an order of magnitude more tenuous than the stream associated with Palomar 5. The stream's orientation on the sky is consistent to a greater or lesser extent with existing proper-motion measurements for the cluster.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/3893a79665b79a2bd87ff10e9ba7e54887453581

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Citations in the corpus

The VPOS: a vast polar structure of satellite galaxies, globular clusters and streams around the Milky Way (2012, background): “NGC 5466: There is a stellar tail associated with the globular cluster NGC 5466 (Grillmair & Johnson 2006).”
Multiple populations in globular clusters (2012, background): “…is ample evidence for this loss, either from tidal tails and extra-tidal stars around some globular clusters (e.g., Odenkirchen et al. 2001, 2003; Grillmair & Johnson 2006; Belokurov et al. 2006; Chun et al. 2010; Jordi & Grebel 2010; Sollima et al. 2011 and references therein), or from the…”
The Accretion Origin of the Milky Way’s Stellar Halo (2007, background): “…of possible disrupted disk origin of much of the Low-Latitude stream) — and a host of tidal tails from globular clusters (e.g., Odenkirchen et al. 2003; Grillmair & Johnson 2006), dwarf galaxies (e.g., Irwin & Hatzidimitriou 1995; Martínez-Delgado et al. 2001), and of unknown origin (e.g.,…”
CONSTRAINING THE MILKY WAY POTENTIAL WITH A SIX-DIMENSIONAL PHASE-SPACE MAP OF THE GD-1 STELLAR STREAM (2009, methodology): “Grillmair (2006), Grillmair & Dionatos (2006a,b), Grillmair & Johnson (2006) were successful in the detection of very long stellar streams using this technique, including the 63◦ long stellar stream GD-1 .”
The stellar halo of the Galaxy (2008, background): “Narrow streams have been detected around globular clusters (Grillmair et al. 1995), the most spectacular examples being Pal 5 (Odenkirchen et al. 2001) and NGC5466 (Grillmair & Johnson 2006; Belokurov et al. 2006a).”
Tracing Galaxy Formation with Stellar Halos. II. Relating Substructure in Phase and Abundance Space to Accretion Histories (2008, background): “…stream (see also Grillmair & Dionatos 2006; Grillmair 2006), which has tentatively been associated with the Ursa Major dwarf galaxy (Fellhauer et al. 2007), and there are several more such streams from globular clusters (Odenkirchen et al. 2003; Grillmair & Johnson 2006; Grillmair & Dionatos 2006).”
CLUMPY STREAMS FROM CLUMPY HALOS: DETECTING MISSING SATELLITES WITH COLD STELLAR STRUCTURES (2010, background): “…of other cold streams with small widths and angular extents (and therefore ages) that rival or even surpass Pal 5 (for example, GD1, NGC5466, Acheron, Cocytos, Lethe, and Styx streams, Grillmair & Johnson 2006; Grillmair & Dionatos 2006b; Fellhauer et al. 2007; Grillmair 2009; Koposov et al. 2010).”
FOUR NEW STELLAR DEBRIS STREAMS IN THE GALACTIC HALO (2008, methodology): “…the remarkably strong tidal tails of Palomar 5 (Odenkirchen et al. 2001; Rockosi et al. 2002; Odenkirchen et al. 2003; Grillmair & Dionatos 2006a) and NGC 5466 (Belokurov et al. 2006a; Grillmair & Johnson 2006), as well as the presumed globular cluster stream GD-1 (Grillmair & Dionatos 2006b).”
Detection of a 63° Cold Stellar Stream in the Sloan Digital Sky Survey (2006, unknown): “Again using the Galactic model of Allen & Santillan (1991) (which Grillmair & Johnson 2006 and Grillmair & Dionatos 2006 found to work reasonably well for NGC 5466 and Pal 5), we use a least-squares method to fit both the orientation on the sky and the distance measurements in § 3.1.”