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A Lack of Planets in 47 Tucanae from a Hubble Space Telescope Search
- R. Gilliland, T. Brown, M. Williams
- Physics, Geology
- 10 December 2000
We report results from a large Hubble Space Telescope project to observe a significant (~34,000) ensemble of main-sequence stars in the globular cluster 47 Tucanae with a goal of defining the…
Are There Unstable Planetary Systems around White Dwarfs?
- J. Debes, S. Sigurdsson
- Physics, Geology
- 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…
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, W. 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…
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, GeologyScience
- 11 July 2003
TLDR
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).…
Perfluorinated alkylated substances (PFAS) in the Nordic environment Perfluorinated alkylated substances (PFAS) in the Nordic environment
- R. Kallenborn, U. Berger, S. Sigurdsson
- Environmental Science
- 2004
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…
Exotic Earths: Forming Habitable Worlds with Giant Planet Migration
- S. Raymond, A. Mandell, S. Sigurdsson
- Geology, PhysicsScience
- 8 September 2006
TLDR
THE Ĝ INFRARED SEARCH FOR EXTRATERRESTRIAL CIVILIZATIONS WITH LARGE ENERGY SUPPLIES. II. FRAMEWORK, STRATEGY, AND FIRST RESULT
- J. Wright, R. Griffith, S. Sigurdsson, M. Povich, B. Mullan
- Physics
- 5 August 2014
We describe the framework and strategy of the Ĝ infrared search for extraterrestrial civilizations with large energy supplies, which will use the wide-field infrared surveys of WISE and Spitzer to…
Intracluster Red Giant Stars in the Virgo Cluster
- P. Durrell, R. Ciardullo, J. Feldmeier, G. Jacoby, S. Sigurdsson
- Physics
- 14 January 2002
We have used the Wide Field Planetary Camera 2 on the Hubble Space Telescope to obtain deep F814W images of a blank field in the Virgo Cluster located 41' northwest of M87. We perform star counts in…
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