Piatek, Slawomir, Pryor, Carlton, Bristow, Paul, Olszewski, Edward W., Harris, Hugh C., Mateo, Mario, ...
The measured proper motion of Fornax, expressed in the equatorial coordinate system, is $(\mu_{\alpha},\mu_{\delta})=(47.6\pm 4.6,-36.0\pm 4.1)$ mas century$^{-1}$. This proper motion is a weighted...
HST Proper Motions and Stellar Dynamics in the Core of the Globular Cluster 47 Tucanae (2006)
McLaughlin, Dean E., Anderson, Jay, Meylan, Georges, Gebhardt, Karl, Pryor, Carlton, Minniti, Dante, ...
We have used HST imaging of the central regions (R
Gerssen, Joris, Van Der Marel, Roeland P., Gebhardt, Karl, Guhathakurta, Puragra, Peterson, Ruth, Pryor, Carlton
It has been reported that there is an error in the figure in Dull et al. (1997, D97) that shows the radial M/L profile in Fokker-Planck models of M15. We discuss how this modifies the interpretation...
Gerssen, Joris, Van Der Marel, Roeland P., Gebhardt, Karl, Guhathakurta, Puragra, Peterson, Ruth, Pryor, Carlton
We analyze HST/STIS spectra (see Paper I) of the central region of the dense globular cluster M15. We infer the velocities of 64 individual stars, two-thirds of which have their velocity measured for...
Structure of the Draco Dwarf Spheroidal Galaxy (2002)
Piatek, Slawomir, Pryor, Carlton, Armandroff, Taft E., Olszewski, Edward W.
This article studies the structure of the Draco dwarf spheroidal galaxy with an emphasis on the question of whether the spatial distribution of its stars has been affected by the tidal interaction...
Stars of the Draco Dwarf Spheroidal Galaxy Beyond its Measured Tidal Boundary (2000)
Piatek, Slawomir, Pryor, Carlton, Armandroff, Taft E., Olszewski, Edward W.
We report R- and V-band photometry derived from CCD imaging for objects in nine fields in and around the Draco dwarf spheroidal galaxy. The most distant fields are about 1.3 degrees from the center....
CFHT Adaptive Optics Observations of the Central Kinematics in M15 (1999)
Gebhardt, Karl, Pryor, Carlton, O'Connell, R. D., Williams, T. B., Hesser, James E.
We have used an Imaging Fabry-Perot Spectrophotometer with the Adaptive Optics Bonnette on the Canada-France-Hawaii Telescope to measure stellar radial velocities in the globular cluster M15. An...
Piatek, Slawomir, Pryor, Carlton, Bristow, Paul, Olszewski, Edward W., Harris, Hugh C., Mateo, Mario, ...
This article presents a measurement of the proper motion of the Ursa Minor dwarf spheroidal galaxy determined from images taken with the Hubble Space Telescope in two distinct fields. Each field...
HST Photometry of the Globular Cluster M4 (1998)
Ibata, Rodrigo A., Richer, Harvey B., Fahlman, Gregory G., Bolte, Michael, Bond, Howard E., Hesser, James E., ...
This paper presents a detailed description of the acquisition and processing of a large body of imaging data for three fields in the globular cluster M4 taken with the Wide Field and Planetary Camera...
Mass Segregation in Young LMC Clusters I. NGC 2157 (1997)
Fischer, Philippe, Pryor, Carlton, Murray, Stephen, Mateo, Mario, Richtler, Tom
We have carried out WFPC2 V- and I-band imaging of the young LMC cluster NGC 2157. Construction of a color-magnitude diagram and isochrone fitting yields an age of tau = 100 000 000 yrs, a reddening...
White Dwarfs in Globular Clusters: HST Observations of M4 (1997)
Richer, Harvey B., Fahlman, Gregory G., Ibata, Rodrigo A., Pryor, Carlton, Bell, Roger A., Bolte, Michael, ...
Using WFPC2 on the Hubble Space Telescope, we have isolated a sample of 258 white dwarfs (WDs) in the Galactic globular cluster M4. Fields at three radial distances from the cluster center were...
Fabry-Perot Observations of Globular Clusters III: M15 (1996)
Gebhardt, Karl, Pryor, Carlton, Williams, T. B., Hesser, James E., Stetson, Peter B.
We have used an Imaging Fabry-Perot Spectrophotometer with the Sub-arcsecond Imaging Spectrograph on the CFHT to measure velocities for 1534 stars in the globular cluster M15. Combined with previous...
Spectroscopic Binaries in Globular Clusters. II. A Search for Long-Period Binaries in M22 (1996)
Cote, Patrick, Pryor, Carlton, McClure, Robert D., Fletcher, J. M., Hesser, James E.
A catalog of 383 radial velocities for red giants in the globular cluster M22 has been compiled from the literature and from new observations accumulated between 1972 and 1994. This 22-year baseline...
Age Gradient and the Second Parameter Problem in the Galactic Halo (1996)
Richer, Harvey B., Harris, William E., Fahlman, Gregory G., Bell, Roger A., Bond, Howard E., Hesser, James E., ...
We establish a framework for determing absolute ages of Galactic globular clusters and then use these ages to investigate the age-metallicity and age-Galactocentric distance relations for the 36...
Hubble Space Telescope Observations of White Dwarfs in the Globular Cluster M4 (1995)
Richer, Harvey B., Fahlman, Gregory G., Ibata, Rodrigo A., Stetson, Peter B., Bell, Roger A., Bolte, Michael, ...
With the Wide Field Planetary Camera 2 (WFPC2) on the Hubble Space Telescope, we have discovered in M4 (NGC 6121, C 1620-264) the first extensive sequence of cooling white dwarfs seen in a globular...