Academic Journal
The spectral energy distributions of white dwarfs in 47 Tucanae: the distance to the cluster
| العنوان: | The spectral energy distributions of white dwarfs in 47 Tucanae: the distance to the cluster |
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| المؤلفون: | Woodley, K. A., Goldsbury, R., Kalirai, J. S., Richer, H. B., Tremblay, P. E., Anderson, J., Bergeron, P., Dotter, A., Esteves, L., Fahlman, G. G., Hansen, B. M. S., Heyl, J., Hurley, J., Rich, R. M., Shara, M. M., Stetson, P. B. |
| المساهمون: | Swinburne University of Technology |
| المصدر: | Astronomical Journal, Vol. 143, no. 2 (Feb 2012), article no. 50 |
| بيانات النشر: | Institute of Physics |
| سنة النشر: | 2012 |
| المجموعة: | Swinburne University of Technology: Swinburne Research Bank |
| الوصف: | We present a new distance determination to the Galactic globular cluster 47 Tucanae by fitting the spectral energy distributions of its white dwarfs (WDs) to pure hydrogen atmosphere WD models. Our photometric data set 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 arcmin2 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 4.69 ± 0.04 ± 0.13 kpc, where the first error is random and the second is systematic. We also search the WD photometry for infrared excess in the F160W filter, indicative of low-mass companions, and find no convincing cases within our sample. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| Relation: | http://hdl.handle.net/1959.3/215468; https://doi.org/10.1088/0004-6256/143/2/50 |
| DOI: | 10.1088/0004-6256/143/2/50 |
| الاتاحة: | http://hdl.handle.net/1959.3/215468 https://doi.org/10.1088/0004-6256/143/2/50 |
| Rights: | Copyright © 2012 The American Astronomical Society. The American Astronomical Society either the accepted manuscript or the published version of the article. However, you can find an earlier version of the full text here: http://arxiv.org/abs/1112.1425. |
| رقم الانضمام: | edsbas.1E329BF8 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1088/0004-6256/143/2/50 |
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