تقرير
An Empirical Determination of the Dust Mass Absorption Coefficient, $\kappa_{d}$, Using the Herschel Reference Survey
| العنوان: | An Empirical Determination of the Dust Mass Absorption Coefficient, $\kappa_{d}$, Using the Herschel Reference Survey |
|---|---|
| المؤلفون: | Clark, Christopher J. R., Schofield, Simon P., Gomez, Haley L., Davies, Jonathan I. |
| سنة النشر: | 2016 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies |
| الوصف: | We use the published photometry and spectroscopy of 22 galaxies in the Herschel Reference Survey to determine that the value of the dust mass absorption coefficient $\kappa_{d}$ at a wavelength of 500 $\mu m$ is $\kappa_{500} = 0.051^{+0.070}_{-0.026}\,{\rm m^{2}\,kg^{-1}}$. We do so by taking advantage of the fact that the dust-to-metals ratio in the interstellar medium of galaxies appears to be constant. We argue that our value for $\kappa_{d}$ supersedes that of James et al. (2002) -- who pioneered this approach for determining $\kappa_{d}$ -- because we take advantage of superior data, and account for a number of significant systematic effects that they did not consider. We comprehensively incorporate all methodological and observational contributions to establish the uncertainty on our value, which represents a marked improvement on the oft-quoted 'order-of-magnitude' uncertainty on $\kappa_{d}$. We find no evidence that the value of $\kappa_{d}$ differs significantly between galaxies, or that it correlates with any other measured or derived galaxy properties. We note, however, that the availability of data limits our sample to relatively massive ($10^{9.7}<{M_{\star}}<10^{11.0}\ {\rm M_{\odot}}$), high metallicity ($8.61<[12+{\rm log}_{10}\frac{O}{H}]<8.86$) galaxies; future work will allow us to investigate a wider range of systems. Comment: Accepted for publication in Monthly Notices of the Royal Astronomical Society |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/stw647 |
| URL الوصول: | http://arxiv.org/abs/1603.04860 |
| رقم الأكسشن: | edsarx.1603.04860 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/stw647 |
|---|