SIMBAD references

2009ApJ...705L.158K - Astrophys. J., 705, L158-L162 (2009/November-2)

Spectroscopic confirmation of the Pisces overdensity.

KOLLMEIER J.A., GOULD A., SHECTMAN S., THOMPSON I.B., PRESTON G.W., SIMON J.D., CRANE J.D., IVEZIC Z. and SESAR B.

Abstract (from CDS):

We present spectroscopic confirmation of the "Pisces Overdensity," also known as "Structure J," a photometric overdensity of RR Lyrae stars discovered by the Sloan Digital Sky Survey at an estimated photometric distance of ∼85 kpc. We measure radial velocities for eight RR Lyrae stars within Pisces. We find that five of the eight stars have heliocentric radial velocities within a narrow range of -87 km/s < vr< -67 km/s, suggesting that the photometric overdensity is mainly due to a physically associated system, probably a dwarf galaxy or a disrupted galaxy. Two of the remaining three stars differ from one another by only 9 km/s, but it would be premature to identify them as a second system.

Abstract Copyright: ∼

Journal keyword(s): galaxies: dwarf - Galaxy: halo - Galaxy: structure - stars: individual: RR Lyrae

Simbad objects: 17

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