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81 papers · 1 filter
Evidence for solar-like oscillations in beta Hydri
Timothy R. Bedding, R. Paul Butler, Hans Kjeldsen +6
We have made a clear detection of excess power, providing strong evidence for solar-like oscillations in the G2 subgiant beta Hyi. We observed this star over five nights with the U…
A revised Cepheid distance to NGC 4258 and a test of the distance scale
Jeffrey A. Newman, Laura Ferrarese, Peter B. Stetson +5
In a previous paper (Maoz et al. 1999), we reported a Hubble Space Telescope (HST) Cepheid distance to the galaxy NGC 4258 obtained using the calibrations and methods then standard…
Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant
W. L. Freedman, B. F. Madore, B. K. Gibson +12
We present here the final results of the Hubble Space Telescope Key Project to measure the Hubble constant. We summarize our method, the results and the uncertainties, tabulate our…
First Results from the Anglo-Australian Planet Search - A Brown Dwarf Candidate and a 51 Peg-like Planet
C. G. Tinney, R. Paul Butler, Geoffrey W. Marcy +5
We report results from the Anglo-Australian Planet Search -- a survey for planets around 200 solar-type stars in the southern hemisphere, which is being carried out on the 3.9m Ang…
A radio and optical study of Molonglo radio sources
C. H. Ishwara-Chandra, D. J. Saikia, P. J. McCarthy +1
We present multi-wavelength radio observations with the Very Large Array and narrow- and broad-band optical observations with the 2.5m telescope at the Las Campanas Observatory, of…
A Young Stellar Cluster in the Nucleus of NGC 4449
T. Boeker, R. P. van der Marel, L. Mazzuca +4
We have obtained 1-2 A resolution optical Echellette spectra of the nuclear star cluster in the nearby starburst galaxy NGC 4449. The light is clearly dominated by a very young (6-…