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HST/WFC3 Observations of Low-Mass Globular Clusters AM 4 and Palomar 13: Physical Properties and Implications for Mass Loss
Katherine M. Hamren, Graeme H. Smith, Puragra GuhaThakurta +4
We investigate the loss of low-mass stars in two of the faintest globular clusters known, AM 4 and Palomar 13 (Pal 13), using HST/WFC3 F606W and F814W photometry. To determine the…
Tracing the Orphan Stream to 55 kpc with RR Lyrae Stars
Branimir Sesar, Carl J. Grillmair, Judith G. Cohen +10
We report positions, velocities and metallicities of 50 ab-type RR Lyrae (RRab) stars observed in the vicinity of the Orphan stellar stream. Using about 30 RRab stars classified as…
Detection of a Nearby Halo Debris Stream in the WISE and 2MASS Surveys
Carl J. Grillmair, Roc Cutri, Frank J. Masci +4
Combining the Wide-Field Infrared Survey Explorer All-Sky Release with the 2MASS Point Source Catalog, we detect a nearby, moderately metal-poor stellar debris stream spanning 24 d…
Gaps in the GD-1 Star Stream
Raymond G. Carlberg, Carl J. Grillmair
GD-1 is a long, thin, Milky Way star stream that has readily visible density variations along its length. We quantify the locations, sizes and statistical significance of the densi…
Kinematic Discovery of a Stellar Stream located in Pisces
Charles Martin, Jeffrey L. Carlin, Heidi Jo Newberg +1
We report the kinematic discovery of the Pisces Stellar Stream (PSS), at Galactic longitude of roughly l=135 degrees and longitude between -39 < b < -36 deg. We originally identifi…