Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/26082
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kama, M. | en_US |
dc.contributor.author | Bruderer, S. | en_US |
dc.contributor.author | van Dishoeck, E. F. | en_US |
dc.contributor.author | Hogerheijde, M. | en_US |
dc.contributor.author | Folsom, C. P. | en_US |
dc.contributor.author | Miotello, A. | en_US |
dc.contributor.author | FEDELE , DAVIDE | en_US |
dc.contributor.author | Belloche, A. | en_US |
dc.contributor.author | Güsten, R. | en_US |
dc.contributor.author | Wyrowski, F. | en_US |
dc.date.accessioned | 2020-06-16T15:24:26Z | - |
dc.date.available | 2020-06-16T15:24:26Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/26082 | - |
dc.description.abstract | Aims: The composition of planetary solids and gases is largely rooted in the processing of volatile elements in protoplanetary disks. To shed light on the key processes, we carry out a comparative analysis of the gas-phase carbon abundance in two systems with a similar age and disk mass, but different central stars: HD 100546 and TW Hya. <BR /> Methods: We combine our recent detections of C<SUP>0</SUP> in these disks with observations of other carbon reservoirs (CO, C<SUP>+</SUP>, C<SUB>2</SUB>H) and gas-mass and warm-gas tracers (HD, O<SUP>0</SUP>), as well as spatially resolved ALMA observations and the spectral energy distribution. The disks are modelled with the DALI 2D physical-chemical code. Stellar abundances for HD 100546 are derived from archival spectra. <BR /> Results: Upper limits on HD emission from HD 100546 place an upper limit on the total disk mass of ≤0.1 M<SUB>☉</SUB>. The gas-phase carbon abundance in the atmosphere of this warm Herbig disk is, at most, moderately depleted compared to the interstellar medium, with [C]/[H]<SUB>gas</SUB> = (0.1-1.5) × 10<SUP>-4</SUP>. HD 100546 itself is a λBoötis star, with solar abundances of C and O but a strong depletion of rock-forming elements. In the gas of the T Tauri disk TW Hya, both C and O are strongly underabundant, with [C]/[H]<SUB>gas</SUB> = (0.2-5.0) × 10<SUP>-6</SUP> and C / O > 1. We discuss evidence that the gas-phase C and O abundances are high in the warm inner regions of both disks. Our analytical model, including vertical mixing and a grain size distribution, reproduces the observed [C]/[H]<SUB>gas</SUB> in the outer disk of TW Hya and allows to make predictions for other systems. <P />Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO programmes 093.C-0926, 093.F-0015, 077.D-0092, 084.A-9016, and 085.A-9027.Spectra and models are only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://130.79.128.5">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/592/A83">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/592/A83 | en_US |
dc.language.iso | eng | en_US |
dc.title | Volatile-carbon locking and release in protoplanetary disks. A study of TW Hya and HD 100546 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201526991 | en_US |
dc.identifier.scopus | 2-s2.0-84982817015 | en_US |
dc.identifier.isi | 000384722600026 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/abs/2016/08/aa26991-15/aa26991-15.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 592 | en_US |
dc.relation.firstpage | A83 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2016A&A...592A..83K | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.orcid | 0000-0001-6156-0034 | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
kama_2016.pdf | Pdf editoriale | 2.51 MB | Adobe PDF | View/Open |
Items in DSpace are published in Open Access, unless otherwise indicated.