Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/29803
DC Field | Value | Language |
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dc.contributor.author | Hoeijmakers, H. J. | en_US |
dc.contributor.author | Ehrenreich, D. | en_US |
dc.contributor.author | Kitzmann, D. | en_US |
dc.contributor.author | Allart, R. | en_US |
dc.contributor.author | Grimm, S. L. | en_US |
dc.contributor.author | Seidel, J. V. | en_US |
dc.contributor.author | Wyttenbach, A. | en_US |
dc.contributor.author | Pino, Lorenzo | en_US |
dc.contributor.author | Nielsen, L. D. | en_US |
dc.contributor.author | Fisher, C. | en_US |
dc.contributor.author | Rimmer, P. B. | en_US |
dc.contributor.author | Bourrier, V. | en_US |
dc.contributor.author | Cegla, H. M. | en_US |
dc.contributor.author | Lavie, B. | en_US |
dc.contributor.author | Lovis, C. | en_US |
dc.contributor.author | Patzer, A. B. C. | en_US |
dc.contributor.author | Stock, J. W. | en_US |
dc.contributor.author | Pepe, F. A. | en_US |
dc.contributor.author | Heng, Kevin | en_US |
dc.date.accessioned | 2021-01-18T09:20:34Z | - |
dc.date.available | 2021-01-18T09:20:34Z | - |
dc.date.issued | 2019 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/29803 | - |
dc.description.abstract | Context. KELT-9 b exemplifies a newly emerging class of short-period gaseous exoplanets that tend to orbit hot, early type stars - termed ultra-hot Jupiters. The severe stellar irradiation heats their atmospheres to temperatures of 4000 K, similar to temperatures of photospheres of dwarf stars. Due to the absence of aerosols and complex molecular chemistry at such temperatures, these planets offer the potential of detailed chemical characterization through transit and day-side spectroscopy. Detailed studies of their chemical inventories may provide crucial constraints on their formation process(es) and evolution history. <BR /> Aims: We aim to search the optical transmission spectrum of KELT-9 b for absorption lines by metals using the cross-correlation technique. <BR /> Methods: We analysed two transit observations obtained with the HARPS-N spectrograph. We used an isothermal equilibrium chemistry model to predict the transmission spectrum for each of the neutral and singly ionized atoms with atomic numbers between three and 78. Of these, we identified the elements that are expected to have spectral lines in the visible wavelength range and used those as cross-correlation templates. <BR /> Results: We detect (>5σ) absorption by Na I, Cr II, Sc II and Y II, and confirm previous detections of Mg I, Fe I, Fe II, and Ti II. In addition, we find evidence of Ca I, Cr I, Co I, and Sr II that will require further observations to verify. The detected absorption lines are significantly deeper than predicted by our model, suggesting that the material is transported to higher altitudes where the density is enhanced compared to a hydrostatic profile, and that the material is part of an extended or outflowing envelope. There appears to be no significant blue-shift of the absorption spectrum due to a net day-to-night side wind. In particular, the strong Fe II feature is shifted by 0.18 ± 0.27 km s<SUP>-1</SUP>, consistent with zero. Using the orbital velocity of the planet we derive revised masses and radii of the star and the planet: M<SUB>*</SUB> = 1.978 ± 0.023 M<SUB>☉</SUB>, R<SUB>*</SUB> = 2.178 ± 0.011 R<SUB>☉</SUB>, m<SUB>p</SUB> = 2.44 ± 0.70 M<SUB>J</SUB> and R<SUB>p</SUB> = 1.783 ± 0.009 R<SUB>J</SUB>. <P />Cross-correlation templates are available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/627/A165">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/627/A165</A> | en_US |
dc.language.iso | eng | en_US |
dc.title | A spectral survey of an ultra-hot Jupiter. Detection of metals in the transmission spectrum of KELT-9 b | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201935089 | en_US |
dc.identifier.scopus | 2-s2.0-85070108073 | en_US |
dc.identifier.isi | 000475840500002 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/abs/2019/07/aa35089-19/aa35089-19.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 627 | en_US |
dc.relation.firstpage | A165 | en_US |
dc.type.referee | REF_1 | 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 | 2019A&A...627A.165H | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_6 Stars and stellar systems | 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.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.orcid | 0000-0002-1321-8856 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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1905.02096.pdf | 11.58 MB | Adobe PDF | View/Open | |
aa35089-19.pdf | PDF editoriale | 13.29 MB | Adobe PDF | View/Open |
29803-aa35089-19_P01.pdf | Miur | 9.26 MB | Adobe PDF | |
29803-aa35089-19_P02.pdf | Miur | 4.11 MB | Adobe PDF |
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