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Copy file name to clipboardExpand all lines: bibliography.bib
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doi = {10.1086/380390},
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year = {2003}
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}
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@article{marvin2006meteorites,
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title = {Meteorites in history: An overview from the Renaissance to the 20th century},
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author = {Marvin, Ursula B},
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year = {2006},
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doi = {10.1144/GSL.SP.2006.256.01.02}
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}
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@book{tielens2005physics,
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title = {The physics and chemistry of the interstellar medium},
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author = {Tielens, Alexander GGM},
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year = {2005},
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publisher = {Cambridge University Press},
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doi = {10.1017/CBO9780511819056}
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}
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@article{wild2011empirical,
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title = {Empirical determination of the shape of dust attenuation curves in star-forming galaxies},
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author = {Wild, Vivienne and Charlot, St{\'e}phane and Brinchmann, Jarle and Heckman, Timothy and Vince, Oliver and Pacifici, Camilla and Chevallard, Jacopo},
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journal = {Monthly Notices of the Royal Astronomical Society},
Copy file name to clipboardExpand all lines: content/research/The late formation of chondrites as a consequence of Jupiter-induced gaps and rings.md
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The birth of [[Cosmochemistry|cosmochemistry]] as field of study can be perhaps traced back to the commune of Alès in Southern France, when Louis Jacques Thénard analyzed and published a study on two soft black stones that had fell on a spring evening of 1806. It was a [[Meteorites|meteorite]], now named after the commune it fell in, and the first carbonaceous [[Chondrites|chondrite]] identified. The study was an elementary analysis of the strange rock's composition, and the field would still take more than a century and then some to become fully accepted within the scientific establishment, after Harold Urey engaged in research on the abundance of elements on Earth and beyond.
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Meteorites however, have been part of the recorded human history since much before. Ursula Marvin's chapter on history of meteorites is an excellent read going much further back. It has been an experiment-first field since its inception, and one of the principal ways to study composition of these rocks has been through [[The Significance of Isotope Chemistry in Cold and Dense Cores#Beyond Clouds|measurement of isotopic ratios]]. In the same vein, the work which is the subject of this post, also finds its motivation in an observation, inferred through analysis of isotopic abundances in these rocks. Apparently,
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Meteorites however, have been part of the recorded human history since much before. @marvin2006meteorites highlights this history of meteorites and is an excellent read going much further back. It has been an experiment-first field since its inception, and one of the principal ways to study composition of these rocks has been through [[The Significance of Isotope Chemistry in Cold and Dense Cores#Beyond Clouds|measurement of isotopic ratios]]. In the same vein, the work which is the subject of this post, also finds its motivation in an observation, inferred through analysis of isotopic abundances in these rocks. Apparently,
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>[!References]- References
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>-[Marvin, Ursula B. (2006). “Meteorites in History: An Overview from the Renaissance to the 20th Century”](https://pubs.geoscienceworld.org/gsl/books/edited-volume/1632/chapter-abstract/107423930/Meteorites-in-historyan-overview-from-the?redirectedFrom=fulltext)
Simplifying by substituting the expression for [[Optically Thick and Optically Thin Media#Optical Depth|optical depth]], $F_{\lambda} = F_{\lambda, \text{unatten}} e^{-\tau_{\lambda}}$
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Simplifying by substituting the expression for [[Optically Thick and Optically Thin Media#Optical Depth|optical depth]], $F_{\lambda} = F_{\lambda, \text{unatten}} e^{-\tau_{\lambda}}$[@wild2011empirical]
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A_{\lambda} = 1.086 \tau_V
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\tau_{\lambda} = \tau_{V} Q_{\lambda}
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The latter factor represents dust extinction and accounts for grain composition and shape, but more importantly also is a function of local geometry of dust and stars along the line of sight as well the global geometry of the galaxy. There are multiple empirical derivation for values of $Q_{\lambda}$, with one of them being the defined as the slopes of the (dust) attenuation curves. The value for this factor used in Tielens (2005), uses $Q_{\lambda} = 2.6$ (see Equation 3.19).
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The latter factor represents dust extinction and accounts for grain composition and shape, but more importantly also is a function of local geometry of dust and stars along the line of sight as well the global geometry of the galaxy. There are multiple empirical derivation for values of $Q_{\lambda}$, with one of them being the defined as the slopes of the (dust) attenuation curves. The value for this factor used in @tielens2005physics, uses $Q_{\lambda} = 2.6$ (see Equation 3.19).
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Now, given this formulation, if one were to express visual extinction ($A_V$) using, say, UV flux or intensities, the final expression comes together as follows
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