The Spectral Energy Distributions of White Dwarfs in 47 Tucanae: The Distance to the Cluster

Abstract

We present a new distance determination to the Galactic globular cluster 47 Tucanae by fitting the spectral energy distributions of its white dwarfs to pure hydrogen atmosphere white dwarf models. Our photometric dataset is obtained from a 121 orbit Hubble Space Telescope program using the Wide Field Camera 3 UVIS/IR channels, capturing F390W, F606W, F110W, and F160W images. These images cover more than 60 square arcmins and extend over a radial range of 5-13.7 arcmin (6.5-17.9 pc) within the globular cluster. Using a likelihood analysis, we obtain a best fitting unreddened distance modulus of (m - M)o=13.36+/-0.02+/-0.06 corresponding to a distance of 4.70+/-0.04+/-0.13 kpc, where the first error is random and the second is systematic. We also search the white dwarf photometry for infrared excess in the F160W filter, indicative of debris disks or low mass companions, and find no convincing cases within our sample.

Accepted to The Astronomical Journal, 13 Figures, 2 Tables. Figures 3 and 6 are figure sets, each composed of 59 subfigures (to appear in the electronic journal). This is a Companion paper to the article ID: submit/0375614

References in corpus (17)

• An Improved Spectroscopic Analysis of DA White Dwarfs from the Sloan Digital Sky Survey Data Release 4
• A Comprehensive Spectroscopic Analysis of DB White Dwarfs
• Ancient planetary systems are orbiting a large fraction of white dwarf stars
• Pollution of single white dwarfs by accretion of many small asteroids
• The White Dwarf Cooling Sequence of NGC6397
• HST Proper Motions and Stellar Dynamics in the Core of the Globular Cluster 47 Tucanae
• Debris Disks Around White Dwarfs: The DAZ Connection
• The Ratio of Helium- to Hydrogen-Atmosphere White Dwarfs: Direct Evidence for Convective Mixing
• Deep ACS Imaging in the Globular Cluster NGC 6397: The Cluster Color Magnitude Diagram and Luminosity Function
• A Deep, Wide-Field, and Panchromatic View of 47 Tuc and the SMC with HST: Observations and Data Analysis Methods
• Relative distances of Omega Centauri and 47 Tucanae
• The nature of the close magnetic white dwarf + probable brown dwarf binary SDSS J121209.31+013627.7
• Cool Companions to White Dwarf Stars from the Two Micron All Sky Survey All Sky Data Release
• Near-Infrared Constraints on the Presence of Warm Dust at Metal-Rich, Helium Atmosphere White Dwarfs
• The Clusters AgeS Experiment (CASE). II. The Eclipsing Blue Straggler OGLEGC-228 in the Globular Cluster 47 Tuc
• The ACS LCID project IV: detection of the RGB bump in isolated galaxies of the Local Group
• The WFC3 Galactic Bulge Treasury Program: A First Look at Resolved Stellar Population Tools

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