Search Results - "King, Ivan R."

The End of the White Dwarf Cooling Sequence in M4: An Efficient Approach by Bedin, Luigi R, Salaris, Maurizio, Piotto, Giampaolo, Anderson, Jay, King, Ivan R, Cassisi, Santi

“…We use 14 orbits of Advanced Camera for Surveys observations to reach the end of the white dwarf cooling sequence in the globular cluster M4. Our photometry…”
Get full text

Relative Frequencies of Blue Stragglers in Galactic Globular Clusters: Constraints for the Formation Mechanisms by Piotto, Giampaolo, De Angeli, Francesca, King, Ivan R, Djorgovski, S. G, Bono, Giuseppe, Cassisi, Santi, Meylan, Georges, Recio-Blanco, Alejandra, Rich, R. M, Davies, Melvyn B

“…We discuss the main properties of the Galactic globular cluster (GC)blue straggler stars (BSSs), as inferred from our new catalog containingnearly 3000 BSSs…”
Get full text

The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XXIII. Proper-motion Catalogs and Internal Kinematics by Libralato, Mattia, Bellini, Andrea, Vesperini, Enrico, Piotto, Giampaolo, Milone, Antonino P., van der Marel, Roeland P., Anderson, Jay, Aparicio, Antonio, Barbuy, Beatriz, Bedin, Luigi R., Borsato, Luca, Cassisi, Santi, Dalessandro, Emanuele, Ferraro, Francesco R., King, Ivan R., Lanzoni, Barbara, Nardiello, Domenico, Ortolani, Sergio, Sarajedini, Ata, Sohn, Sangmo Tony

“…Abstract A number of studies based on the data collected by the Hubble Space Telescope (HST) GO-13297 program “HST Legacy Survey of Galactic Globular Clusters:…”
Get full text

Discovery of Extended Blue Horizontal Branches in Two Metal-rich Globular Clusters by Rich, R. Michael, Sosin, Craig, Djorgovski, S. George, Piotto, Giampaolo, King, Ivan R, Renzini, Alvio, Phinney, E. Sterl, Dorman, Ben, Liebert, James, Meylan, Georges

Get full text

ω Centauri: The Population Puzzle Goes Deeper by Bedin, Luigi R, Piotto, Giampaolo, Anderson, Jay, Cassisi, Santi, King, Ivan R, Momany, Yazan, Carraro, Giovanni

Get full text

Reaching the End of the White Dwarf Cooling Sequence in NGC 6791 by Bedin, Luigi R, King, Ivan R, Anderson, Jay, Piotto, Giampaolo, Salaris, Maurizio, Cassisi, Santi, Serenelli, Aldo

“…We present new observations of the white dwarf sequence of the old open cluster NGC 6791. The brighter peak previously observed in the white dwarf luminosity…”
Get full text

Toward High‐Precision Astrometry with WFPC2. I. Deriving an Accurate Point‐Spread Function by Anderson, Jay, King, Ivan R.

“…The first step toward doing high‐precision astrometry is the measurement of individual stars in individual images, a step that is fraught with dangers when the…”
Get full text

Metallicities on the Double Main Sequence of ω Centauri Imply Large Helium Enhancement by Piotto, Giampaolo, Villanova, Sandro, Bedin, Luigi R, Gratton, Raffaele, Cassisi, Santi, Momany, Yazan, Recio-Blanco, Alejandra, Lucatello, Sara, Anderson, Jay, King, Ivan R, Pietrinferni, Adriano, Carraro, Giovanni

“…Having shown in a recent paper that the main sequence of omega Centauri is split into two distinct branches, we now present spectroscopic results showing that…”
Get full text

The White Dwarf Cooling Sequence in NGC 6791 by Bedin, Luigi R, Salaris, Maurizio, Piotto, Giampaolo, King, Ivan R, Anderson, Jay, Cassisi, Santi, Momany, Yazan

Get full text

Probing the Faintest Stars in a Globular Star Cluster by Richer, Harvey B, Anderson, Jay, Brewer, James, Davis, Saul, Fahlman, Gregory G, Hansen, Brad M.S, Hurley, Jarrod, Kalirai, Jasonjot S, King, Ivan R, Reitzel, David, Rich, R. Michael, Shara, Michael M, Stetson, Peter B

“…NGC 6397 is the second closest globular star cluster to the Sun. Using 5 days of time on the Hubble Space Telescope, we have constructed an ultradeep…”
Get full text

The Space Motion of the Globular Cluster NGC 6397 by Kalirai, Jasonjot S, Anderson, Jay, Richer, Harvey B, King, Ivan R, Brewer, James P, Carraro, Giovanni, Davis, Saul D, Fahlman, Gregory G, Hansen, Brad M. S, Hurley, Jarrod R, Lépine, Sébastien, Reitzel, David B, Rich, R. Michael, Shara, Michael M, Stetson, Peter B

“…As a by-product of high-precision, ultradeep stellar photometry in the Galactic globular cluster NGC 6397 with the Hubble Space Telescope, we are able to…”
Get full text

Color-Magnitude Diagram and Luminosity Function of M4 near the Hydrogen-burning Limit by Bedin, Luigi R, Anderson, Jay, King, Ivan R, Piotto, Giampaolo

Get full text

The Luminosity Function of the Globular Cluster NGC 6397 near the Limit of Hydrogen Burning by King, Ivan R, Anderson, Jay, Cool, Adrienne M, Piotto, Giampaolo

Get full text

A Probable Dwarf Nova Outburst in the Core of the Globular Cluster M22 by Anderson, Jay, Cool, Adrienne M, King, Ivan R

Get full text

REACHING THE END OF THE WHITE DWARF COOLING SEQUENCE IN NGC 67911 by BEDIN, Luigi R, KING, Ivan R, ANDERSON, Jay, PIOTTO, Giampaolo, SALARIS, Maurizio, CASSISI, Santi, SERENELLI, Aldo

Get full text

Peculiar Multimodality on the Horizontal Branch of the Globular Cluster NGC 2808 by Sosin, Craig, Dorman, Ben, Djorgovski, S. George, Piotto, Giampaolo, Rich, R. Michael, King, Ivan R, Liebert, James, Phinney, E. Sterl, Renzini, Alvio

Get full text

Mass Segregation in the Globular Cluster NGC 6397 by King, Ivan R, Sosin, Craig, Cool, Adrienne M

Get full text

Panel Discussion on the Classification and Terminology of Stellar Populations by King, Ivan R

Get full text

An Improved Distortion Solution for the Hubble Space Telescope ’s WFPC2 by Anderson, Jay, King, Ivan R.

Get full text

An Improved Distortion Solution for theHubble Space Telescope’s WFPC21 by Anderson, Jay, King, Ivan R.

“…Having an accurate distortion correction is critical to doing accurate astrometry with the Wide Field Planetary Camera 2. Currently available solutions have…”
Get full text