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- Publications
- Influence
Are There Unstable Planetary Systems around White Dwarfs
- J. Debes, S. Sigurdsson
- Physics
- 14 February 2002
The presence of planets around solar-type stars suggests that many white dwarfs should have relic planetary systems. While planets closer than ~5 AU will most likely not survive the… Expand
Viral Glycosphingolipids Induce Lytic Infection and Cell Death in Marine Phytoplankton
- E. Giulotto, S. Sigurdsson, +5 authors K. Lindblad-Toh
- 2009
, 861 (2009); 326 Science et al. Assaf Vardi, Cell Death in Marine Phytoplankton Viral Glycosphingolipids Induce Lytic Infection and www.sciencemag.org (this information is current as of November 5,… Expand
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- PDF
Closing in on a Short-Hard Burst Progenitor: Constraints from Early-Time Optical Imaging and Spectroscopy of a Possible Host Galaxy of GRB 050509b
- J. Bloom, J. Prochaska, +25 authors W. M. Wood-Vasey
- Physics
- 24 May 2005
The localization of the short-duration, hard-spectrum gamma-ray burst GRB 050509b by the Swift satellite was a watershed event. We report the discovery of the probable host galaxy, a bright… Expand
A Young White Dwarf Companion to Pulsar B1620-26: Evidence for Early Planet Formation
- S. Sigurdsson, H. Richer, B. Hansen, I. Stairs, S. Thorsett
- Physics, Medicine
- Science
- 11 July 2003
The pulsar B1620-26 has two companions, one of stellar mass and one of planetary mass. We detected the stellar companion with the use of Hubble Space Telescope observations. The color and magnitude… Expand
The binary star population of the young cluster NGC 1818 in the Large Magellanic Cloud
- R. Elson, S. Sigurdsson, M. Davies, J. Hurley, G. Gilmore
- Physics
- 1 November 1998
We determine the binary star fraction as a function of radius in NGC 1818, a young rich cluster in the Large Magellanic Cloud, using Hubble Space Telescope images in bands F336W (∼U) and F555W (∼V).… Expand
Binary-single star interactions in globular clusters
- S. Sigurdsson, E. Phinney
- Physics
- 1 October 1993
An extensive series of three-body interactions involving hard binaries and single stars are calculated by direct integration of ∼10 5 encounters. Unlike previous calculations, the stars have… Expand
Measuring mass-loss rates from Galactic satellites
- K. Johnston, S. Sigurdsson, L. Hernquist
- Physics
- 21 May 1998
Number count profiles of many Galactic and some extra-galactic satellite systems show evidence for associated stars beyond the cut-off in density that is identified as the point of tidal limitation… Expand
The Metallicity Distribution of Intracluster Stars in Virgo
- B. Williams, R. Ciardullo, +11 authors K. Freeman
- Physics
- 12 October 2006
TLDR
Models of Galaxies with Central Black Holes: Adiabatic Growth in Spherical Galaxies
- G. Quinlan, L. Hernquist, S. Sigurdsson
- Physics
- 1 July 1994
We add black holes to nonrotating, spherical galaxy models, with the assumption that the black-hole growth is slow compared with the dynamical time but fast compared with the relaxation time. The… Expand
Close Binaries as the Progenitors of the Brightest Planetary Nebulae
- R. Ciardullo, S. Sigurdsson, J. Feldmeier, George H. Jacoby Penn State University, Noao, Wiyn
- Physics
- 27 April 2005
We investigate the possible progenitors of the planetary nebulae (PNs) that populate the top 0.5 mag of the [O III] λ5007 planetary nebula luminosity function (PNLF). We show that the absolute… Expand