229 citations · 1.9k across the 39 of their papers we have counts for
12 papers · 2 filters
The Survival Rate of Ejected Terrestrial Planets with Moons
J. H. Debes, S. Sigurdsson
During planet formation, a gas giant will interact with smaller protoplanets that stray within its sphere of gravitational influence. We investigate the outcome of interactions bet…
Modeling of Emission Signatures of Massive Black Hole Binaries: I Methods
Tamara Bogdanovic, Britton D. Smith, Steinn Sigurdsson +1
We model the electromagnetic signatures of massive black hole binaries (MBHBs) with an associated gas component. The method comprises numerical simulations of relativistic binaries…
Blue straggler stars in dwarf spheroidal galaxies
M. Mapelli, E. Ripamonti, E. Tolstoy +3
Blue straggler star (BSS) candidates have been observed in all old dwarf spheroidal galaxies (dSphs), however whether or not they are authentic BSSs or young stars has been a point…
Cool Customers in the Stellar Graveyard IV: Spitzer Search for Mid-IR excesses Around Five DAs
J. H. Debes, S. Sigurdsson, B. Hansen
Hydrogen atmosphere white dwarfs with metal lines, so-called DAZs, require external accretion of material to explain the presence of weak metal line absorption in their photosphere…
Metal Cooling in Simulations of Cosmic Structure Formation
Britton D. Smith, Steinn Sigurdsson, Tom Abel
The addition of metals to any gas can significantly alter its evolution by increasing the rate of radiative cooling. In star-forming environments, enhanced cooling can potentially…
Role of Dynamical Research in the Detection and Characterization of Exoplanets
Eric B. Ford, Fred C. Adams, Phil Armitage +6
(Abridged) The discovery of extrasolar planetary systems revealed an unexpected diversity of planetary systems that has revolutionized planet formation theory. A strong program of…