5.4k citations
- Herzberg Institute of AstrophysicsCA876 papers
- Centre National de la Recherche ScientifiqueFR414 papers
- University of VictoriaCA314 papers
- University of TorontoCA277 papers
- Dominion Astrophysical ObservatoryCA238 papers
- California Institute of TechnologyUS237 papers
- University of OttawaCA185 papers
- Center for Astrophysics Harvard & SmithsonianUS179 papers
- University of Hawaii SystemUS165 papers
- University of British ColumbiaCA153 papers
- Canada–France–Hawaii TelescopeUS143 papers
- Johns Hopkins UniversityUS142 papers
29 papers · 2 filters
Sodium-Oxygen anticorrelation among Horizontal Branch Stars in the Globular Cluster M4
A. F Marino, S. Villanova, A. P. Milone +4
The horizontal branch (HB) morphology of globular clusters (GC) is mainly governed by metallicity. The second parameter problem, well known since the 60's, states that metallicity…
Are Proto-Planetary Nebulae Shaped by a Binary? Results of a Long-Term Radial Velocity Study
Bruce J. Hrivnak, Wenxian Lu, Katrina Loewe Wefel +4
The shaping of the nebula is currently one of the outstanding unsolved problems in planetary nebula (PN) research. Several mechanisms have been proposed, most of which require a bi…
Supernova 2008bk and Its Red Supergiant Progenitor
Schuyler D. Van Dyk, Tim J. Davidge, Nancy Elias-Rosa +8
We have obtained limited photometric and spectroscopic data for Supernova (SN) 2008bk in NGC 7793, primarily at >~ 150 d after explosion. We find that it is a Type II-Plateau (II-P…
A Submillimeter Array Survey of Protoplanetary Disks in the Orion Nebula Cluster
Rita K. Mann, Jonathan P. Williams
We present the full results of our 3-year long Submillimeter Array survey of protoplanetary disks in the Orion Nebula Cluster. We imaged 23 fields at 880 microns and 2 fields at 13…
Fiducial Stellar Population Sequences for the VJKs Photometric System
Crystal Brasseur, Peter B. Stetson, Don A. VandenBerg +3
We have obtained broad-band near-infrared photometry for seven Galactic star clusters (M92, M15, M13, M5, NGC1851, M71 and NGC6791) using the WIRCam wide-field imager on the Canada…
The Be Star HD 215227: A Candidate Gamma-ray Binary
S. J. Williams, D. R. Gies, R. A. Matson +4
The emission-line Be star HD 215227 lies within the positional error circle of the newly identified gamma-ray source AGL J2241+4454. We present new blue spectra of the star, and we…