Search Publications
The Extragalactic Distance Database
Shaya, Edward J.; Tully, R. Brent; Makarov, Dmitry I. +3 more
A database can be accessed on the Web at http://edd.ifa.hawaii.edu that was developed to promote access to information related to galaxy distances. The database has three functional components. First, tables from many literature sources have been gathered and enhanced with links through a distinct galaxy nam…
The Star Formation History of the Large Magellanic Cloud
Zaritsky, Dennis; Harris, Jason
We present the first ever global, spatially resolved reconstruction of the star formation history (SFH) of the Large Magellanic Cloud (LMC), based on the application of our StarFISH analysis software to the multiband photometry of 20 million of its stars from the Magellanic Clouds Photometric Survey. The general outlines of our results are consist…
The High Angular Resolution Multiplicity of Massive Stars
Gies, Douglas R.; Henry, Todd J.; Mason, Brian D. +2 more
We present the results of a speckle interferometric survey of Galactic massive stars that complements and expands upon a similar survey made over a decade ago. The speckle observations were made with the Kitt Peak National Observatory and Cerro Tololo Inter-American Observatory 4 m telescopes and USNO speckle camera, and they are sensitive to the …
The Extragalactic Distance Database: Color-Magnitude Diagrams
Shaya, Edward J.; Tully, R. Brent; Makarov, Dmitry I. +3 more
The color-magnitude diagrams/tip of the red giant branch (CMDs/TRGB) section of the Extragalactic Distance Database contains a compilation of observations of nearby galaxies from the Hubble Space Telescope. Approximately 250 (and increasing) galaxies in the Local Volume have CMDs and the stellar photometry tables used to produce them available thr…
Red Supergiants as Potential Type IIn Supernova Progenitors: Spatially Resolved 4.6 µm CO Emission Around VY CMa and Betelgeuse
Smith, Nathan; Hinkle, Kenneth H.; Ryde, Nils
We present high-resolution 4.6 µm CO spectra of the circumstellar environments of two red supergiants (RSGs) that are potential supernova (SN) progenitors: Betelgeuse and VY Canis Majoris (VY CMa). Around Betelgeuse, 12CO emission within ±3'' (±12 km s-1) follows a mildly clumpy but otherwise spherical shell, smaller th…
Star Clusters in M31. I. A Catalog and a Study of the Young Clusters
Caldwell, Nelson; Harding, Paul; Rose, James A. +3 more
We present an updated catalog of 1300 objects in the field of M31, including 670 likely star clusters of various types, the rest being stars or background galaxies once thought to be clusters. The coordinates in the catalog are accurate to 0farcs2, and are based on images from the Local Group Survey (LGS) or from the Digitized Sky Survey (DSS). Ar…
The Lyman Alpha Morphology of Local Starburst Galaxies: Release of Calibrated Images
Hayes, Matthew; Östlin, Göran; Leitherer, Claus +4 more
We present reduced and calibrated high resolution Lyman-alpha (Lyα) images for a sample of six local star-forming galaxies. Targets were selected to represent a range in luminosity and metallicity and to include both known Lyα emitters and nonemitters. Far ultraviolet imaging was carried out with the Solar Blind Channel of the Advanced Camera for …
Orbits and Masses of the Satellites of the Dwarf Planet Haumea (2003 EL61)
Ragozzine, D.; Brown, M. E.
Using precise relative astrometry from the Hubble Space Telescope and the W. M. Keck Telescope, we have determined the orbits and masses of the two dynamically interacting satellites of the dwarf planet (136108) Haumea, formerly 2003 EL61. The orbital parameters of Hi'iaka, the outer, brighter satellite, match well the previously derived orbit. On…
Exo-Dat: An Information System in Support of the CoRoT/Exoplanet Science
Guterman, P.; Barbieri, M.; Deleuil, M. +9 more
Exo-Dat is a database and an information system created primarily in support of the exoplanet program of the COnvection ROtation & planetary Transits (CoRoT) mission. In the directions of CoRoT pointings, it provides a united interface to several sets of data: stellar published catalogs, photometric and spectroscopic data obtained during the m…
STIS Imaging of the HR 4796A Circumstellar Debris Ring
Schneider, G.; Becklin, E. E.; Weinberger, A. J. +2 more
We have obtained high spatial resolution imaging observations of the HR 4796A circumstellar debris dust ring using the broad optical response of the Hubble Space Telescope Imaging Spectrograph (STIS) in coronagraphic mode. We use our visual wavelength observations to improve upon the earlier measured geometrical parameters of the ring-like disk. T…