41 citations · 182 across the 8 of their papers we have counts for
8 papers
Carbon stars as standard candles -- III. Un-binned maximum likelihood fitting and comparison with TRGB estimations
Javiera Parada, Jeremy Heyl, Harvey Richer +2
In the second paper of this series, we developed a new distance determination method using the median magnitude of carbon-rich asymptotic giant branch stars (CS) as standard ca…
Carbon stars as standard candles: II. The median J magnitude as a distance indicator
Javiera Parada, Jeremy Heyl, Harvey Richer +2
We introduce a new distance determination method using carbon-rich asymptotic giant branch stars (CS) as standard candles and the Large and Small Magellanic Clouds (LMC and SMC) as…
Carbon stars as standard candles: I. The luminosity function of carbon stars in the Magellanic Clouds
Paul Ripoche, Jeremy Heyl, Javiera Parada +1
Our goal in this paper is to derive a carbon-star luminosity function that will eventually be used to determine distances to galaxies at - Mpc and hence yield a value of th…
Deep HST Imaging in 47 Tucanae: A Global Dynamical Model
J. Heyl, I. Caiazzo, H. Richer +3
Multi-epoch observations with ACS and WFC3 on HST provide a unique and comprehensive probe of stellar dynamics within 47 Tucanae. We confront analytic models of the globular cluste…
Formation and Evolution of Blue Stragglers in 47 Tucanae
Javiera Parada, Harvey Richer, Jeremy Heyl +2
Blue stragglers (BSS) are stars whose position in the Color-Magnitude Diagram (CMD) places them above the main sequence turn-off (TO) point of a star cluster. Using data from the c…
Dynamical estimate of post main sequence stellar masses in 47 Tucanae
Javiera Parada, Harvey Richer, Jeremy Heyl +2
We use the effects of mass segregation on the radial distribution of different stellar populations in the core of 47 Tucanae to find estimates for the masses of stars at different…
A Measurement of Diffusion in 47 Tucanae
Jeremy Heyl, Harvey B. Richer, Elisa Antolini +4
Using images from the Hubble Space Telescope Wide-Field Camera 3, we measure the rate of diffusion of stars through the core of the globular cluster 47 Tucanae using a sample of yo…
When do stars in 47 Tucanae lose their mass?
Jeremy Heyl, Jason Kalirai, Harvey B. Richer +4
By examining the diffusion of young white dwarfs through the core of the globular cluster 47 Tucanae, we estimate the time when the progenitor star lost the bulk of its mass to bec…