The abundance and thermal history of water ice in the disk surrounding HD 142527 from the DIGIT Herschel Key Program
<i>Context. <i/>The presence or absence of ice in protoplanetary disks is of great importance to the formation of planets. By enhancing solid surface density and increasing sticking efficiency, ice catalyzes the rapid formation of planetesimals and decreases the timescale of giant planet...
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| Main Authors: | , , , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
29 August 2016
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| In: |
Astronomy and astrophysics
Year: 2016, Volume: 593 |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/201425432 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1051/0004-6361/201425432 Verlag, lizenzpflichtig, Volltext: https://www.aanda.org/articles/aa/abs/2016/09/aa25432-14/aa25432-14.html 
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| Author Notes: | M. Min, J. Bouwman, C. Dominik, L.B.F.M. Waters, K.M. Pontoppidan, S. Hony, G.D. Mulders, Th Henning, E.F. van Dishoeck, P. Woitke, Neal J. Evans II and The DIGIT Team |
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| 245 | 0 | 4 | |a The abundance and thermal history of water ice in the disk surrounding HD 142527 from the DIGIT Herschel Key Program |c M. Min, J. Bouwman, C. Dominik, L.B.F.M. Waters, K.M. Pontoppidan, S. Hony, G.D. Mulders, Th Henning, E.F. van Dishoeck, P. Woitke, Neal J. Evans II and The DIGIT Team |
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| 520 | |a <i>Context. <i/>The presence or absence of ice in protoplanetary disks is of great importance to the formation of planets. By enhancing solid surface density and increasing sticking efficiency, ice catalyzes the rapid formation of planetesimals and decreases the timescale of giant planet core accretion.<i>Aims. <i/>In this paper, we analyze the composition of the outer disk around the Herbig star HD 142527. We focus on the composition of water ice, but also analyze the abundances of previously proposed minerals.<i>Methods. <i/>We present new <i>Herschel <i/>far-infrared spectra and a re-reduction of archival data from the Infrared Space Observatory (ISO). We modeled the disk using full 3D radiative transfer to obtain the disk structure. Also, we used an optically thin analysis of the outer disk spectrum to obtain firm constraints on the composition of the dust component.<i>Results. <i/>The water ice in the disk around HD 142527 contains a large reservoir of crystalline water ice. We determine the local abundance of water ice in the outer disk (i.e., beyond 130 AU). The re-reduced ISO spectrum differs significantly from that previously published, but matches the new <i>Herschel <i/>spectrum at their common wavelength range. In particular, we do not detect any significant contribution from carbonates or hydrous silicates, in contrast to earlier claims.<i>Conclusions. <i/>The amount of water ice detected in the outer disk requires ~80% of oxygen atoms. This is comparable to the water ice abundance in the outer solar system, comets, and dense interstellar clouds. The water ice is highly crystalline while the temperatures where we detect it are too low to crystallize the water on relevant timescales. We discuss the implications of this finding. | ||
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| 700 | 1 | |a Dominik, C. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Waters, L. B. F. M. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Pontoppidan, K. M. |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Woitke, P. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Ii, Neal J. Evans |e VerfasserIn |4 aut | |
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