Grain growth in the inner regions of Herbig Ae/Be star disks
| العنوان: | Grain growth in the inner regions of Herbig Ae/Be star disks |
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| المؤلفون: | Laurentius Waters, Cornelis P. Dullemond, R. van Boekel, A. de Koter, Carsten Dominik, Francesco Paresce, J. Bouwman |
| المساهمون: | Low Energy Astrophysics (API, FNWI), Physics of Living Systems |
| المصدر: | Astronomy & Astrophysics, 400, L21-L24. EDP Sciences Van Boekel, R, Waters, L, Dominik, C, Bouwman, J G, de Koter, A, Dullemond, C P & Paresce, F 2003, ' Grain growth in the inner regions of Herbig Ae/Be star disks ', Astronomy and Astrophysics, vol. 400, no. 3, pp. L21-L24 . https://doi.org/10.1051/0004-6361:20030141 Astronomy and Astrophysics, 400(3), L21-L24. EDP Sciences |
| بيانات النشر: | EDP Sciences, 2003. |
| سنة النشر: | 2003 |
| مصطلحات موضوعية: | Physics, Astronomy, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Herbig Ae/Be star, Silicate, chemistry.chemical_compound, Grain growth, Stars, chemistry, Settling, Space and Planetary Science, Particle-size distribution, Astrophysics::Solar and Stellar Astrophysics, Circumstellar dust, Astrophysics::Earth and Planetary Astrophysics, Spectroscopy, Astrophysics::Galaxy Astrophysics |
| الوصف: | We present new mid-infrared spectroscopy of the emission from warm circumstellar dust grains in Herbig Ae/Be stars. Our survey significantly extends the sample that was studied by Bouwman et al. (2001). We find a correla- tion between the strength of the silicate feature and its shape. We interpret this as evidence for the removal of small (0.1m) grains from the disk surface while large (1-2m) grains persist. If the evolution of the grain size distribution is dominated by gravitational settling, large grains are expected to disappear first, on a timescale which is much shorter than the typical age of our programme stars. Our observations thus suggest a continuous replenishment of micron sized grains at the disk surface. If the grain replenishment is due to the dredge-up of dust from the disk interior, the mineralogy we observe is representative of the bulk composition of dust in these stars. |
| وصف الملف: | application/pdf |
| تدمد: | 1432-0746 0004-6361 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5bf3d605fcc7c4c4e7be3598999e1398 https://doi.org/10.1051/0004-6361:20030141 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....5bf3d605fcc7c4c4e7be3598999e1398 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14320746 00046361 |
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