22k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Massachusetts Institute of TechnologyUS255 papers
- California Institute of TechnologyUS233 papers
- Triangle Universities Nuclear LaboratoryUS232 papers
- Center for Astrophysics Harvard & SmithsonianUS218 papers
- Duke UniversityUS195 papers
- University of California, BerkeleyUS186 papers
- Lawrence Berkeley National LaboratoryUS185 papers
- Centre National de la Recherche ScientifiqueFR182 papers
- University of WashingtonUS182 papers
- Princeton UniversityUS178 papers
- The University of Texas at AustinUS168 papers
- Vanderbilt UniversityUS159 papers
15 papers · 2 filters
Observations of the pulsating subdwarf B star Feige 48: Constraints on evolution and companions
M. D. Reed, S. D. Kawaler
Since pulsating subdwarf B (sdBV or EC14026) stars were first discovered (Kilkenny et al, 1997), observational efforts have tried to realize their potential for constraining the in…
The Pisgah Automated Survey: A Photometric Search for Low-mass Detached Eclipsing Binaries and Other Variable Stars
M. Lopez-Morales, J. Christopher Clemens
The Pisgah Survey, located at the facilities of the Pisgah Astronomical Research Institute in Rosman NC, is a low cost project to acquire fully-automated I band photometry of selec…
Image-Subtraction Photometry of the Globular Cluster M3: identification of new double-mode RR Lyrae stars
G. Clementini, T. M. Corwin, B. W. Carney +1
We have applied the image subtraction method to the M3 dataset previously analyzed by Corwin & Carney (2001; CC01). The new analysis produced light curves and periods for 15 variab…
Clumpy Flows in Protoplanetary and Planetary Nebulae
A. Y. Poludnenko, A. Frank, S. Mitran
Many astrophysical flows occur in inhomogeneous media. We briefly discuss some general properties of the adiabatic and radiative inhomogeneous systems and discuss the relevance of…
A puzzling periodicity in the pulsating DA white dwarf G 117-B15A
Rubina Kotak, Marten H. van Kerkwijk, J. Christopher Clemens
We present time-resolved optical spectrophotometry of the pulsating hydrogen atmosphere (DA) white dwarf G 117-B15A. We find three periodicities in the pulsation spectrum (215s, 27…
Strings in the Eta Carinae Nebula: Hypersonic Radiative Cosmic Bullets
A. Y. Poludnenko, A. Frank, S. Mitran
We present the results of a numerical study focusing on the propagation of a hypersonic bullet subject to radiative cooling. Our goal is to explore the feasibility of such a model…
A Search for Very Extended Ionized Gas in Nearby Starburst and Active Galaxies
S. Veilleux, P. L. Shopbell, D. S. Rupke +2
We report the results from a pilot study of 10 nearby starburst and active galaxies conducted with the Taurus Tunable Filter (TTF) on the Anglo-Australian and William Herschel Tele…
Correlated Isocurvature Fluctuation in Quintessence and Suppressed CMB Anisotropies at Low Multipoles
Takeo Moroi, Tomo Takahashi
We consider cosmic microwave background (CMB) anisotropy in models with quintessence taking into account of isocurvature fluctuation in the quintessence. It is shown that, if the p…
Dark Energy Present and Future
Paul H. Frampton
By studying the present cosmological data, particularly on CMB, SNeIA and LSS, we find that the future fate of the universe, for simple linear models of the dark energy equation-of…
A Laboratory Investigation of Supersonic Clumpy Flows: Experimental Design and Theoretical Analysis
A. Y. Poludnenko, K. K. Dannenberg, R. P. Drake +5
We present a design for high energy density laboratory experiments studying the interaction of hypersonic shocks with a large number of inhomogeneities. These ``clumpy'' flows are…
High Resolution Spectroscopy of the Pulsating White Dwarf G29-38
Susan E. Thompson, J. C. Clemens, M. H. van Kerkwijk +1
We present the analysis of time-resolved, high resolution spectra of the cool white dwarf pulsator, G29-38. From measuring the Doppler shifts of the H-alpha core, we detect velocit…
Star formation histories of early-type galaxies. I: Higher order Balmer lines as age indicators
Nelson Caldwell, James A. Rose, Kristi Dendy Concannon
(shortened) We have obtained blue integrated spectra of 175 nearby early-type galaxies, covering a wide range in galaxy velocity dispersion, and emphasizing those with sigma < 100…
Amplitude and frequency variability of the pulsating DB white dwarf stars KUV 05134+2605 and PG 1654+160 observed with the Whole Earth Telescope
G. Handler
We have acquired new time series photometry of the two pulsating DB white dwarf stars KUV 05134+2605 and PG 1654+160 with the Whole Earth Telescope. Additional single-site photomet…
Probing Planck-scale Physics with Extragalactic Sources?
Y. Jack Ng, W. A. Christiansen, H. van Dam
At Planck-scale, spacetime is "foamy" due to quantum fluctuations predicted by quantum gravity. Here we consider the possibility of using spacetime foam-induced phase incoherence o…
Blue Horizontal Branch Stars in Old, Metal-Rich Stellar Systems
Ruth C. Peterson, Bruce W. Carney, Ben Dorman +5
Twenty years ago, Burstein et al. (1984)suggested that strong CN and Hbeta absorption meant younger ages among globular clusters in the Andromeda galaxy (M31), unless blue stars ab…