338 citations · 1.3k across the 43 of their papers we have counts for
9 papers · 1 filter
Projected distances to host galaxy reduce SNIa dispersion
R. Hill, H. Shariff, R. Trotta +8
We use multi-band imagery data from the Sloan Digital Sky Survey (SDSS) to measure projected distances of 302 supernova type Ia (SNIa) from the centre of their host galaxies, norma…
A Bayesian Analysis of the Ages of Four Open Clusters
Elizabeth J. Jeffery, Ted von Hippel, David A. van Dyk +4
In this paper we apply a Bayesian technique to determine the best fit of stellar evolution models to find the main sequence turn off age and other cluster parameters of four interm…
Detecting Relativistic X-ray Jets in High-Redshift Quasars
Kathryn McKeough, Aneta Siemiginowska, C. C. Cheung +12
We analyze Chandra X-ray images of a sample of 11 quasars that are known to contain kiloparsec scale radio jets. The sample consists of five high-redshift (z >= 3.6) flat-spectrum…
Bayesian Analysis of Two Stellar Populations in Galactic Globular Clusters III: Analysis of 30 Clusters
R. Wagner-Kaiser, D. C. Stenning, A. Sarajedini +5
We use Cycle 21 Hubble Space Telescope (HST) observations and HST archival ACS Treasury observations of 30 Galactic Globular Clusters to characterize two distinct stellar populatio…
Standardizing Type Ia supernovae using Near Infrared rebrightening time
Hikmatali Shariff, Suhail Dhawan, Xiyun Jiao +3
Accurate standardisation of Type Ia supernovae (SNIa) is instrumental to the usage of SNIa as distance indicators. We analyse a homogeneous sample of 22 low-z SNIa, observed by the…
Bayesian Analysis of Two Stellar Populations in Galactic Globular Clusters I: Statistical and Computational Methods
D. C. Stenning, R. Wagner-Kaiser, E. Robinson +4
We develop a Bayesian model for globular clusters composed of multiple stellar populations, extending earlier statistical models for open clusters composed of simple (single) stell…
Bayesian Analysis of Two Stellar Populations in Galactic Globular Clusters II: NGC 5024, NGC 5272, and NGC 6352
R. Wagner-Kaiser, D. C. Stenning, E. Robinson +5
We use Cycle 21 Hubble Space Telescope (HST) observations and HST archival ACS Treasury observations of Galactic Globular Clusters to find and characterize two stellar populations…
Bayesian Estimates of Astronomical Time Delays between Gravitationally Lensed Stochastic Light Curves
Hyungsuk Tak, Kaisey Mandel, David A. van Dyk +3
The gravitational field of a galaxy can act as a lens and deflect the light emitted by a more distant object such as a quasar. Strong gravitational lensing causes multiple images o…
A Repelling-Attracting Metropolis Algorithm for Multimodality
Hyungsuk Tak, Xiao-Li Meng, David A. van Dyk
Although the Metropolis algorithm is simple to implement, it often has difficulties exploring multimodal distributions. We propose the repelling-attracting Metropolis (RAM) algorit…